Brief Summary of Minutes of Annual Meeting

The following is a brief report of several items discussed:

1. Nancy Cavallaro gave a synopsis of upcoming grant opportunities.
2. The group thought of holding the next meeting in Washington, DC during fall 2018 since there will be no SSSA meeting next fall (meets in San Diego in January 2019).  Nancy was supportive of this option and offered to help with meeting room, etc.
3. Annual reports
   1. The report needs to be submitted within 60 days of the annual meeting (Dec. 24, 2017). 
   2. Daniel Strawn is to send out a notice to have everyone submit their reports to Daniel or Ganga Hettiarachchi by Dec. 1.
   3. The reason the report is critical at this time is this project will be reviewed as a mid-term project in early January 2018.  They reviewers will need to see a report from the 2017 meeting.
4. Recruitment of new members to the group is also discussed.
5. Reports on special activities for development and use of advanced microscopic molecular analysis in soils
   1. Special Section entitled “Application of Synchrotron Radiation-Based Methods for Environmental Biogeochemistry” in Journal of Environmental Quality Nov-Dec 2017 Issue is mentioned. Organization of this special section and several published manuscripts were from the members of this group.
6. The future leadership for the group
   1. Chair – Ganga Hettiarachchi
   2. Vice Chair/Secretary- Wei Zhang

Members of this project are applying a wide range of analytical tools to elucidate mechanisms of physical and chemical protection of carbon in soils, cycling and reaction pathways of nutrient elements in soils, colloid transport through soil, removal and in situ stabilization of soil contaminants, effect of climate change on soil structure, storage and transport of soil water, and deposition of synthetic nanoparticles on the human respiratory system. More detailed description of research outcomes by the different groups is presented below. 

Groundwater vulnerability to pollutant transport through soil and geologic materials is an environmental concern. Dr. Steve Anderson and his group at University of Missouri conducted a study to evaluate selected methods for averaging pixels in computed tomography (CT) images obtained with dynamic chemical transport through several undisturbed core samples. Computed tomography scans of dynamic fluid transport studies allowed spatial estimates of transport pore velocity and dispersivity parameters. Group pixel averaging methods were used to determine these properties. Averaging methods ranged from 0.5 by 0.5 mm resolution to 10 by 10 mm resolution. Results showed that transport parameter estimates varied slightly as a function of which method was selected. These studies showed that the lower resolution images produced more consistent values as well as values approximating estimates determined from the core average experiments. Recommendations for future studies indicate accurate results are obtained with the 2 by 2 mm resolution (compromise between the highest resolution for more data and the lowest resolution for results similar to the core average). Experimental results appeared appropriate for the geomedia used in this study.

Dr. Daniel Giménez and his group at Rutgers University continued working on the characterization of soil pore structure obtained with x-ray computed tomography (CT). He and his collaborators tested changes in pore size distributions measured at four scales (local distributions) in samples of four soils, and proposed a method to generate global pore size distributions containing information on pore sizes imaged at the several scales. Global distributions are likely to better represent 'true' pore size distributions of soils. In their study, global size distributions compared well with pore size distributions derived from water retention curves. They also demonstrated for the first time that enrichment of atmospheric CO₂ could lead to a change in the fractal structure of soils and to a shift in pore size distributions, which has important implications for soil management under climate change. An important component of Dr. Giménez group efforts was dedicated to characterize the shape of soil peds from qualitative descriptions done in the field. The importance of this work is that it could potentially unlock valuable information contained in databases with soil profile descriptions such as those in the National Cooperative Soil Survey (NCSS) Characterization Database. The group is also documenting changes in infiltration rates on a long-term experiment, designed to test the effect of supplemental irrigation on ecosystem properties.

Dr. Allen Goldstein and his group at the University of California, Berkeley generated new insights into gas/particle partitioning of organics and secondary aerosol formation in the atmosphere from oxidation of both naturally emitted biogenic volatile organic compounds as well as anthropogenically emitted air pollutants. The group published results this year from field studies in California, the Southeastern United States, and the Brazilian Amazon. In these field campaigns and associated laboratory studies we applied novel technologies developed in our laboratory for speciated organic gas and particle measurements.

Rhizobacterial biofilm development influences terrestrial carbon and nitrogen cycles with ramifications for crop and soil health. Phenazine-1-carboxylic acid (PCA) is a redox-active metabolite produced by rhizobacteria in dryland wheat fields of Washington and Oregon. Dr. James Harsh and his colleagues at the Washington State University compared irrigated and dryland wheat systems inoculated with a PCA-producing (PCA⁺) strain and a PCA-deficient (PCA^‑) mutant strain of Pseudomonas synxantha. Biofilms in dryland rhizospheres were more robust in PCA+ than in PCA- inoculated rhizospheres, and few biofilms were observed in irrigated rhizospheres. In dryland PCA⁺ rhizospheres, the turnover of some ¹⁵N-labelled rhizobacterial biomass was slower than in the other treatments, and incorporation of bacterial ¹⁵N into root cell walls was observed in multiple treatments. These results indicate that PCA promotes the development of biofilms in dryland rhizospheres and likely influences crop nutrition and soil health in dryland wheat fields. They quantified the transport of Escherichia coli pathogenic O157:H7 and nonpathogenic K12 strains in water-saturated Quincy sand (QS) columns amended with oxidized or unoxidized pine wood (PW) or pine bark (PB) biochar produced at either 350 or 600 degrees C. Their results showed that (1) the addition of oxidized biochar into QS columns enhanced the transport of E. coli O157:H7 by 3.1 fold compared to the unoxidized counterparts, likely due to increased negative charge density. (2) The retention of E. coli O157:H7 was 3.3 fold higher than that of E. coli K12 in all biochar-amended sand columns. (3) Increased application rates of unoxidized PW600 biochar from 0 to 20 wt % led to a reduction in the transport of E. coli O157:H7 and K12 from 98 to 10% and from 95 to 70%, respectively. Mixing sand with unoxidized PW350 at a 20 wt % application rate resulted in almost complete retention of the pathogenic E. coli in the subsurface, suggesting that utilizing sand mixed with biochar can act as a biofilter capable of protecting natural aquifers from pathogens. They also examined the potential relationships between porosity and surface functionality of biochar and soil water retention characteristics. Their results indicated that the amount of oxygenated functional groups on the surface of biochars clearly differentiated the biochars in terms of hydrophilicity, with the oxidized biochars being superior, followed by the low-temperature biochars, while the high temperature biochars possessed lowest hydrophilicity. As a result, oxidized biochars exhibited better wettability compared to unoxidized biochars, regardless their feedstock source. Significant correlation occurred between the total acidic functional groups on biochar surface and water contents at different matric potentials. Over a wide range of soil water potentials, oxidized biochar-soil mixtures held more water than the unoxidized biochar-soil mixtures except near saturation (-0.1 to -5 kPa). Soil water contents at different matric potentials were significantly inter-correlated (P < 0.01) and correlated with bulk densities of biochar-amended soil samples.

Phosphorus fertilizer use efficiency is poor (10-30%) in many acid and calcareous soils as a result of fixation reactions between the orthophosphate anion and various forms of Ca, Fe or Al that limit the nutrient’s availability to plants. In response to concern of crop P deficiency, growers tend to apply more than is necessary creating a surplus of P in soil that is not labile but can still erode or leach into nearby waterbodies compromising drinking water quality, recreational activities, and aquatic wildlife. Moreover inclusion of micronutrients in commercial macronutrient fertilizers is a common practice throughout the world and has been driven mainly by product physical characteristics than by considerations of fertilizer efficiency. The cost of conventional micronutrient fertilizers as well as yield loss due to their inefficient utilization is considerable and therefore it is essential to find new application methods that increase the efficiency of micronutrient acquisition. Dr. Ganga Hettiarachchi and her group at the Kansas State University have been investigating the mobility, availability and reaction products of phosphorus and micronutrient fertilizers in different soils. The group used synchrotron based x-ray techniques to obtain nutrient speciation to understand/explain P and micronutrient mobility and potential plant availability in soils. Improved understanding of the fundamental mechanisms responsible for the enhanced mobility or availability of different P and micronutrient fertilizers in carefully selected soil types will help to determine under which circumstances certain P and micronutrient fertilizers offer the potential to significantly increase agricultural productivity.

Dr. Gediminas (Gedi) Mainelis and his group at the Rutgers University continued the investigation of the release of nanoparticles due to the use of nanotechnology-enabled clothing, especially those that are advertised as containing silver. In addition, they started an investigation of resuspension of nanoparticles from surfaces and their agglomerates due to the use nanotechnology sprays in households. In the first project, particle release was simulated using a rotary abrader, and the released particles were measured using a Scanning Mobility Particle Sizer and an Aerodynamic Particle Sizer. The data were analyzed to examine potential user exposures to particles due to the use of clothing items and also to determine if there is a difference in the released particle concentration when the clothing items are new or used (e.g., washed). They also focused on the morphology and composition of particles in the clothing items versus the morphology and composition of particles in the airborne state. They found that particles varying in size from tens of nanometers to micrometers would be released into the air during simulated clothing wear. The acquired material had varying concentrations and composition of metals. For example, one of the products had the Ti concentration as high as ~74 mg/kg. They acquired 11 items that were advertised as containing silver and concentrations of silver varied substantially among the investigated items: from 51 µg/kg to as high 45 g/kg. The very high silver concentration in this item was consistent with it releasing the highest concentration of particles >1 µm as well as the highest overall particle concentration. They also confirmed that particles released from the products are nanoparticles, their agglomerates, and particles from product matrix. Nanoparticle agglomerates contained primary nanoparticles sized 60-100nm. Presence of metals in the released particles was confirmed by collecting particles on a filter and examining them using SEM-EDS. The collected samples were shown to have Ti and Ag particles. The overall airborne silver concentration released from some products reached as high as several micrograms for a cubic meter. Their data from this project show that nano-sized particles, including those containing silver, could be released during clothing use. The user may be exposed to those per via inhalation route. In the second project, various nanosprays were used in a specially-built room where the concentration of background particles is controlled. The silver and zinc-based nanosprays were used in the room, and their concentrations were measured. The sprays were allowed to settle for a day on the floor (either carpet or linoleum) and then a researcher walked on the floor and the resuspended particles were measured. They found that resuspended particles included nanoparticle agglomerates. The mass concentration of resuspended particles was higher closer to the floor compared to concentrations measured at 1.5 m height. This suggests that children playing on the floor would be exposed to higher concentrations of resuspended nanoparticle agglomerates compared to adults.

Climate change-induced perturbations in the hydrologic regime are expected to impact biogeochemical processes, including contaminant mobility and cycling. Elevated levels of geogenic and anthropogenic arsenic are found along many coasts around the world, most notably in south and southeast Asia but also in the United States, particularly along the Mid-Atlantic coast. The mechanism by and the extent to which arsenic may be released in contaminated coastal soils due to sea level rise are unknown. Dr. Don Sparks and his group at the University of Delaware showed a series of data from a coastal arsenic contaminated soil exposed to sea and river waters in biogeochemical microcosm reactors across field-validated redox conditions. They found that reducing conditions lead to arsenic release from historically contaminated coastal soils through reductive dissolution of arsenic-bearing mineral oxides in both sea and river water inundations, with less arsenic release from seawater scenarios than river water due to inhibition of oxide dissolution. For the first time, they systematically display gradation of solid phase soil-arsenic speciation across defined redox windows from reducing to oxidizing conditions in natural waters by combining biogeochemical microcosm experiments and X-ray absorption spectroscopy. Their results demonstrate the threat of sea level rise stands to impact arsenic release from contaminated coastal soils by changing redox conditions.

Dr. Dan Strawn and his group at the University of Idaho conducted researching on a waste water treatment process that will supply unrestricted reuse water, will recycle nutrients, and will sequester carbon in soils to help mitigate greenhouse gas increases in the atmosphere. The Strawn’s group conducted research on how soil factors affect cadmium uptake by wheat grown in the Inland Pacific Northwest wheat growing regions. His group also investigated the effects of dissolved organic matter from animal manure on phosphate precipitation on soil minerals using P K-edge and L-edge spectroscopy. The group researched how dissolved organic matter in manure-amended soils affects Cu mobility, and used FTIR and UV/Vis spectroscopy to elucidate speciation of the dissolved organic matter. They conducted experiments on soil P availability and watershed export from a long-term agriculture watershed research site located on the R. J. Cook Agronomy Farm (CAF) on the Palouse landscape in the Northwest Wheat and Range Region. In this project, the group speciated P as inorganic and organic phases.

The distribution of ferric iron (Fe(III)) between the octahedral and tetrahedral sheets of smectites is still an active problem due to the difficulty of identifying and quantifying the tetrahedral ferric iron (tetrahedral Fe(III), denoted [4]Fe(III)). Mossbauer spectroscopy has often been used to address this problem, with the spectra being fitted by a sum of doublets, but the empirical attribution of each doublet has failed to yield a uniform interpretation of the spectra of natural reference Fe(III)-rich smectites, especially with regard to [4]Fe(III)), because little consensus exists as to the [4]Fe((III)) content of natural samples. In an effort to resolve this problem, Dr. Joseph Stucki and his group at the University of Illinois conducted a study using a series of synthetic nontronites [4]Si(IV)x Fe(III)(1-x)] (Fe(III)2O10)-Fe2(OH)Nax with x ranging from 0.51 to 1.3. Mossbauer spectra were obtained at 298, 77, and 4 K. Statistically acceptable deconvolutions of the Mossbauer at 298 and 77 K were used to develop a model of the distribution of tetrahedral substitutions, taking into account: (1) the [4]Fe((III) content; (2) the three possible tetrahedral cationic environments around [6]Fe(III), i.e., [4Si]-(3([6])Fe((III))), [3Si [4]Fe(III)]-(3([6])Fe((III))), and [2Si 2[4]Fe((III))]-(3([6])Fe((III))); and (3) the local environment around a [4]Fe((III)), i.e., [3Si]-(2([6])Fe((III))) respecting Lowenstein's Rule. This approach allowed the range of Mossbauer parameters for [6]Fe(III) and [4]Fe(III) to be determined and then applied to spectra of natural Fe(III)-rich smectites. Results revealed the necessity of taking into account the distribution of tetrahedral cations [4]R(III) around [6]Fe(III) cations to deconvolute the Mossbauer spectra, and also highlighted the influence of sample crystallinity on Mossbauer parameters.

Dr. Kang Xia and her group at the Virginia Tech investigated the antibacterial activity of Fe³⁺-saturated montmorillonite mechanistically using municipal wastewater effluents. Bacterial deactivation efficiency (bacteria viability loss) was 92±0.64% when a secondary wastewater effluent was mixed with Fe³⁺-saturated montmorillonite for 30 min, and further enhanced to 97±0.61% after 4 hours. This deactivation efficiency was similar to that when the same effluent was UV-disinfected before it exited a wastewater treatment plant. Furthermore, 99.6-99.9% of total coliforms, E. coli, and enterococci in a secondary wastewater effluent was deactivated when the water was exposed to Fe³⁺-saturated montmorillonite for 1 h. Bacterial colony count results coupled with the live/dead fluorescent staining assay observation suggested that Fe³⁺-saturated montmorillonite deactivated bacteria in wastewater through two possible stages: electrostatic sorption of bacterial cells to the surfaces of Fe³⁺-saturated montmorillonite, followed by bacterial deactivation due to mineral surface-catalyzed bacterial cell membrane disruption by the surface sorbed Fe³⁺. Freeze-drying the recycled Fe³⁺-saturated montmorillonite after each usage resulted in 82±0.51% bacterial deactivation efficiency even after its fourth consecutive use. As a follow up this study, a novel method to impregnate Fe³⁺-saturated montmorillonite in cellulose filter paper was tested and its effectiveness in reducing the levels of harmful microorganisms in water was demonstrated. The Scanning Electron Microscopy (SEM) imaging showed that Fe³⁺-saturated montmorillonite was evenly dispersed and coated over the cellulose fiber surface. When it was used to filter water spiked with live Escherichia coli (E. coli) cells at 3.67×10⁸ CFU/mL, 99% of E. coli was deactivated. SEM test of E. coli cells trapped on the filter paper indicated dehydration of the cells, resulting in their deactivation. The dielectrophoresis and impedance analysis of E. coli cells passing through the filter paper to filtrate confirmed their non-viability.

At Michigan State University the group of Dr. Wei Zhang has been studying the fate and transport of fine particulate matter (i.e., colloids and engineered nanoparticles) and emerging contaminants such as pharmaceuticals and antibiotic resistance genes (ARGs), as well as the use of particulate sorbents for contaminant immobilization in soil and water. Specifically, Dr. Zhang’s group has been investigating soil biochar amendment as a sustainable practice. The work in his lab has shown that manure-derived biochars have the long-term sequestration potential for antibiotics in water. His lab characterized the amount and properties of dissolved organic carbon (DOC) in 46 biochars, and developed a UV-vis spectrophotometry method to predict the DOC concentrations in biochars. The manuscript on this study is currently under revision. The release of DOC from biochars will likely open up biochar pores and enhance the sequestration of contaminants by biochars, which is very important to development of soil biochar amendment technique. His group also investigated the effect of irrigation methods (i.e., overhead vs soil surface irrigation) on pharmaceutical residues and changes of bacterial community and ARGs in greenhouse lettuce leaves, roots, and soils upon exposure to pharmaceuticals in irrigation water. The level of pharmaceutical residues in lettuce shoots was greater under overhead irrigation than under soil surface irrigation. One manuscript summarizing the results is currently under revision. The pharmaceutical exposure also changed the bacterial community and ARG profiles. A manuscript on these results is under preparation. In collaboration with Chinese scientists, their work also showed that the release of DOC from biochars enhanced the sorption of hydrophobic organic contaminants. River sediments inhibited the sorption of 17β-estradiol and 17α-ethinylestradiol by carbon nanotubes and graphene oxide, as modulated by sediment particle size and organic matter. These results have interesting implications to the environmental fate and transport of the hormones. Finally, their work also showed that the aggregation of extracellular DNA (i.e., biological nanoparticles) is influenced by Fe(III) and Al(III) species in water, and revealed the binding mechanisms between DNA and the cations.

Journal publications

Acikgoz, S., S.H. Anderson, C.J. Gantzer, A.L. Thompson, and R.J. Miles. 2017. 125 years of soil and crop management on Sanborn Field: Effects on soil physical properties related to soil erodibility. Soil Science 182:172-180.

Adams, R.I., D.S. Lymperopoulou, P.K. Misztal. R.D.C. Pessotti, S.W. Behie, Y. Tian, A.H. Goldstein, S.E. Lindow, W.W. Nazaroff, J.W. Taylor, M.F. Traxler, T.D. Bruns, 2017. Microbes and associated soluble and volatile chemicals on periodically wet household surfaces, Microbiome, 5:128, DOI 10.1186/s40168-017-0347-6, 2017.  

Attanayake, C.P., G.M. Hettiarachchi, Q. Ma, G.M. Pierzynski, M.D. Ransom. 2017. Lead speciation and in vitro bioaccessibility of compost-amended urban garden soils. J. Environ. Qual. Published online 09/07/2017, doi:10.2134/jeq2017.02.0065.

Baron, F., S. Petit, M. Pentrak, A. Decarreau, and J.W. Stucki. 2017. Revisiting the nontronite Mössbauer spectra. American Mineralogist, 102, 1501-1515.

Bedmar, F.; D. Giménez, J. C. Costa, and P. Daniel. 2017. Persistence of acetochlor, atrazine and s-metolachlor in surface and sub-surface horizons of two Typic Argiudolls under no-tillage. Environ. Toxicol. Chem. 36: 3065-3073.

Blair, S.L., A.C. MacMillan, G.T. Drozd, A.H. Goldstein, R.K. Chu, L. Paša-Tolić, J.B. Shaw, N. Tolić, P. Lin, J. Laskin, A. Laskin, and S.A. Nizkorodov, Molecular Characterization of Organosulfur Compounds in Biodiesel and Diesel Fuel Secondary Organic Aerosol. 2017. Environmental Science & Technology, 51, 119−127, DOI: 10.1021/acs.est.6b03304.

Caplan, J.S., D. Giménez, V. Subroy, R. J. Heck, S. A. Prior, G. B. Runion, and H. A. Torbert. 2017. Nitrogen mediates the effect of CO₂ on soil pore structure. Glob Change Biol. 23, 1585–1597.

Cássaro, F.AM, A. N. Posadas, D. Giménez, and C. M. P. Vaz. 2017. Pore-size distributions of soils derived using a geometrical approach and multiple resolution micro CT images. Soil Sci. Soc. Am. J. 81:468–476.

Chao, Q., C. Q. Chen, C. Shang, and K. Xia*. 2017. Fe³⁺-Saturated Montmorillonite Effectively Deactivates Microorganisms in Wastewater. Sci. Total Environ. (accepted)

Chen, Z., W. Zhang, G. Wang, Y. Zhang, Y. Gao, S.A. Boyd, B.J. Teppen, J.M. Tiedje, D. Zhu, and H. Li. 2017. Bioavailability of soil-sorbed tetracycline to Escherichia coli under unsaturated conditions. Environmental Science & Technology, 51: 6165-6173. DOI: 10.1021/acs.est.7b00590.

de Sá, S. S., B.B. Palm, P. Campuzano-Jost, D.A. Day, M.K. Newburn, W. Hu, G. Isaacman-VanWertz, L.D. Yee, R. Thalman, J. Brito, S. Carbone, P. Artaxo, A.H. Goldstein, A.O. Manzi, R.A.F. Souza, F. Mei, J.E. Shilling, S.R. Springston, J. Wang, J.D. Surratt, M.L. Alexander, J.L. Jimenez, and S.T. Martin 2017. Influence of urban pollution on the production of organic particulate matter from isoprene epoxydiols in central Amazonia, Atmos. Chem. Phys., 17, 6611-6629, https://doi.org/10.5194/acp-17-6611-2017.

Galkaduwa, M.B., G.M. Hettiarachchi, G.J. Kluitenberg, S.L. Hutchinson, L. Erickson, L. Davis. 2017. Transport and transformation of selenium and other constituents of flue-gas desulfurization wastewater in water-saturated soil materials. J. Environ Qual. 46:384-392. 

Gao, Y., X. Hu, Z. Zhou, W. Zhang, Y. Wang, and B. Sun. 2017. Phytoavailability and mechanism of bound PAH residues in filed contaminated soils. Environmental Pollution, 222, 465-476. DOI: 10.1016/j.envpol.2016.11.076.

Gentner, D.R., S.H. Jathar, T.D. Gordon, R. Bahreini, D.A. Day, I. El Haddad, P.L. Hayes, S.M. Pieber, S.M. Platt, J.A. de Gouw, A.H. Goldstein, R.A. Harley, J.L. Jimenez, A.S.H. Prevot, and A.L. Robinson, Review of Urban Secondary Organic Aerosol Formation from Gasoline and Diesel Motor Vehicle Emissions, Environ. Sci. Technol., DOI: 10.1021/acs.est.6b04509, 51, 1074−1093, 2017.

Haruna, S.I., S.H. Anderson, N.V. Nkongolo, T. Reinbott, and S. Zaibon. 2017. Soil thermal properties influenced by perennial biofuel and cover crop management. Soil Sci. Soc. Am. J. 81:1147-1156.

Hettiyadura, A. P. S., T. Jayarathne, K. Baumann, A.H. Goldstein, J.A. de Gouw, A. Koss, F.N. Keutsch, K. Skog, and E.A. Stone. 2017. Qualitative and quantitative analysis of atmospheric organosulfates in Centreville, Alabama, Atmos. Chem. Phys., 17, 1343-1359, doi:10.5194/acp-17-1343-2017.

Hirmas, D., and D. Giménez. 2017. A geometric equation for representing morphological field information in horizons with compound structure. Soil Sci. Soc. Am. J. 81:863–867.

Hunter, J. F., D. A. Day, R. L. N. Yatavelli, B. B. Palm, A. W. H. Chan, L. Kaser, L. Cappellin, P. L. Hayes, E. S. Cross, A. J. Carrasquillo, P. Campuzano-Jost, H. Stark, Y. Zhao, T. Hohaus, J. N. Smith, A. Hansel, T. Karl, A. H. Goldstein, A. Guenther, D. R. Worsnop, J. A. Thornton, C. L. Heald, J. L. Jimenez, and J. H. Kroll. 2017. Comprehensive characterization of atmospheric organic carbon at a forested site, Nature Geoscience, DOI: 10.1038/NGEO3018, published online: 4 Sept, 2017.

Ippolito, J. C.M. Berry, D.G. Strawn, J.M. Novak, J. Levine, A. Harley. 2017. Heavy Metal Sorption Mechanisms in Biochar Amended Mine Tailings. Journal of Environmental Quality 46:411–419.

Isaacman-VanWertz, G., P. Massoli, R.E. O’Brien, J.B. Nowak, M.R. Canagaratna, J.T. Jayne, D.R. Worsnop, L. Su, D.A. Knopf, P.K. Misztal, C. Arata, A.H. Goldstein, and J. H. Kroll, Using advanced mass spectrometry techniques to fully characterize atmospheric organic carbon: current capabilities and remaining gaps, Faraday Discussions, DOI: 10.1039/c7fd00021a, 2017.

LeMonte, J.J., J.W. Stuckey, J.Z. Sanchez, R.V. Tappero, J. Rinklebe and D.L. Sparks. 2017. Sea level rise induced arsenic release from historically contaminated coastal soils. Environ. Sci. Technol. 51(11): 5913−5922. DOI: 10.1021/acs.est.6b06152

Lerch, R.N., C.H. Lin, K.W. Goyne, R.J. Kremer, and S.H. Anderson. 2017. Vegetative buffer strips for reducing herbicide transport in runoff: effects of buffer width, vegetation, and season. J. Am. Water Resour. Assoc. 53:667-683.

Liang, X., D.G. Strawn, J. Chen, J. Marshall. 2017. Variation in cadmium accumulation in spring wheat cultivars: uptake and redistribution to grain. Plant and Soil. 421:219–231.

Ma, P. K., Y. Zhao, A.L. Robinson, D.R. Worton, A.H. Goldstein, A.M. Ortega, J.-L. Jimenez, P. Zotter, A.S.H. Prévôt, S. Szidat, and P.L. Hayes, Evaluating the impact of new observational constraints on P-S/IVOC emissions, multi-generation oxidation, and chamber wall losses on SOA modeling for Los Angeles, CA, Atmos. Chem. Phys., 17, 9237-9259, https://doi.org/10.5194/acp-17-9237-2017, 2017.

Madsen, R.B., Zhang, H., Biller, B., Goldstein, A.H., Glasius, M. 2017. Characterizing semi-volatile organic compounds of bio-crude from hydrothermal liquefaction of biomass, Energy and Fuels, DOI: 10.1021/acs.energyfuels.7b00160.

Martin, S. T., P. Artaxo, L. Machado, A. O. Manzi, R. A. F. Souza, C. Schumacher, J. Wang, T. Biscaro, J. Brito, A. Calheiros, K. Jardine, A. Medeiros, B. Portela, S. S. d. Sá, K. Adachi, A. C. Aiken, R. Albrecht, L. Alexander, M. O. Andreae, H. M. J. Barbosa, P. Buseck, D. Chand, J. M. Comstock, D. A. Day, M. Dubey, J. Fan, J. Fast, G. Fisch, E. Fortner, S. Giangrande, M. Gilles, A. H. Goldstein, A. Guenther, J. Hubbe, M. Jensen, J. L. Jimenez, F. N. Keutsch, S. Kim, C. Kuang, A. Laskin, K. McKinney, F. Mei, M. Miller, R. Nascimento, T. Pauliquevis, M. Pekour, J. Peres, T. Petäjä, C. Pöhlker, U. Pöschl, L. Rizzo, B. Schmid, J. E. Shilling, M. A. S. Dias, J. N. Smith, J. M. Tomlinson, J. Tóta, and M. Wendisch. 2017. The Green Ocean Amazon Experiment (GoAmazon2014/5) observes pollution affecting gases, aerosols, clouds, and rainfall over the rain forest. Bull. Am. Meteorol. Soc., 98, 981-997, doi:10.1175/bams-d-15-00221.1.

Ott, M.R., D.S. Page-Dumroese, D.G. Strawn, J.M. Tirocke. Using organic amendments to restore soil physical and chemical properties of a mine site in northeastern Oregon, USA. Transactions of the ASABE 2017; 0: 0.

Pye, H. O. T., B.N. Murphy, L. Xu, N.L. Ng, A.G. Carlton, H. Guo, R. Weber, P. Vasilakos, K.W. Appel, S.H. Budisulistiorini, J.D. Surratt, A. Nenes, A., W. Hu, J.L. Jimenez, G. Isaacman-VanWertz, P. K. Misztal, and A. H. Goldstein. 2017. On the implications of aerosol liquid water and phase separation for organic aerosol mass, Atmos. Chem. Phys., 17, 343-369, doi:10.5194/acp-17-343-2017.

Qin, C., F. Kang, W. Zhang, W. Shou, and Y. Gao. 2017. Environmentally-relevant concentrations of Al(III) and Fe(III) cations induce aggregation of free DNA by complexation with phosphate group. Water Research, 123, 58-66. DOI: 10.1016/j.watres.2017.06.043.

Romer, P.S., K.C. Duffey, P.J. Wooldridge, E. Edgerton, K. Baumann, P.A. Feiner, D.O. Miller, W.H. Brune, A.R. Koss, J.A. de Gouw, P.K. Misztal, A.H. Goldstein, and R. C. Cohen, Effects of temperature-dependent NOx emissions on continental ozone production, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-881, in review, 2017.

Saliba, G., R. Saleh, Y. Zhao, A.A. Presto, A.T. Lambe, B. Frodin, S. Sardar, H. Maldonado, C. Maddox, A.A. May, G.T. Drozd, A.H. Goldstein, L.M. Russell, F.P. Hagen, and A.L. Robinson. 2017. A comparison of gasoline direct injection (GDI) and port fuel injection (PFI) vehicle emissions: emission certification standards, cold start, secondary organic aerosol formation potential, and potential climate impacts, Environ. Sci. Technol., Article ASAP, 10.1021/acs.est.6b06509.  

Sanchez, D., D. Jeong, R. Seco, I. Wrangham., J.H. Park, W.H. Brune, A. Koss., J..Gilman, J. de Gouw, P. Misztal, A. Goldstein, K. Baumann, P.O. Wennberg, F.N. Keutsch, A. Guenther, S. Kim. 2017. Intercomparison of OH concentrations and OH reactivity measurements in a high isoprene and low NO environment during the Southern Oxidants and Aerosol Study (SOAS), Atmospheric Environment, Available online.

Shrivastava, M., C.D. Cappa, J. Fan, A.H. Goldstein, A.B. Guenther, J.L. Jimenez, C. Kuang, A. Laskin, S.T. Martin, N.L. Ng, T. Petaja, J. R. Pierce, P.J. Rasch, P. Roldin, J.H. Seinfeld, J. Shilling, J.N. Smith, J.A. Thornton, R. Volkamer, J. Wang, D.R. Worsnop, R.A. Zaveri, A. Zelenyuk, Q. Zhang. 2017. Recent advances in understanding secondary organic aerosol: implications for global climate forcing, Reviews of Geophysics, 10.1002/2016RG000540, accepted manuscript online.

Starcher, A., E. J. Elzinga and D. L. Sparks. 2017. Formation of a mixed Fe(II)-Zn-Al layered hydroxide: Effects of Zn co-sorption on Fe(II) layered hydroxide formation and kinetics. Chem. Geol 464: 46–56.

Suliman, W., J. B. Harsh, N. Abu-Lail, Fortuna, A-M., I. Dallmeyer, and M. Garcia-Perez. 2017. The role of biochar porosity and surface functionality in augmenting hydrologic properties of a sandy soil. Sci. Total Environ. 574:139-147. 

Suliman, W., J.B. Harsh, A.M. Fortuna, M. Garcia-Perez and N.I. Abu-Lail. 2017. Quantitative effects of biochar oxidation and pyrolysis temperature on the transport of pathogenic and nonpathogenic escherichia coli in biochar-amended sand columns. Environmental Science & Technology 51: 5071-5081. doi:10.1021/acs.est.6b04535.

Sun, W., M. Li, W. Zhang, J. Wei, B. Chen, and C. Wang. 2017. Sediments inhibit adsorption of 17β-estradiol and 17α-ethinylestradiol to carbon nanotubes and graphene oxide. Environmental Science: Nano, 4, 1900-1910. DOI: 10.1039/C7EN00416H.

Uehling, J., A. Gryganskyi, K. Hameed, T. Tschaplinski, P. K. Misztal, S. Wu, A. Desirò, N. Vande Pol, Z. Du, A. Zienkiewicz, K. Zienkiewicz, E. Morin, E. Tisserant, R. Splivallo, M. Hainaut, B. Henrissat, R. Ohm, A. Kuo, J. Yan, A. Lipzen, M. Nolan, K. LaButti, K. Barry, A. H. Goldstein, J. Labbé, C. Schadt, G. Tuskan, I. Grigoriev, F. Martin, R. Vilgalys and G. Bonito. 2017. Comparative genomics of Mortierella elongata and its bacterial endosymbiont Mycoavidus cysteinexigens, Environmental Microbiology, doi:10.1111/1462-2920.13669.

Vaughan, A.R., J.D. Lee, M.D. Shaw, P. Misztal, S. Metzger, M. Vieno, B. Davidson, T. Karl, L. Carpenter, A.C. Lewis, R. Purvis, A. Goldstein, and C.N. Hewitt, VOC emission rates over London and South East England obtained by airborne eddy covariance, Faraday Discussions, doi: 10.1039/C7FD00002B, 2017.

Vega, M. A., H. V. Kulkarni, N. Mladenov, K. Johannesson, G. M. Hettiarachchi, P. Bhattacharya, N. Kumar, J. Weeks, M. Galkaduwa and S. Datta. 2017. Biogeochemical Controls on the Release and Accumulation of Mn and As in Shallow Aquifers, West Bengal, India. Front. Environ. Sci., 5:29. doi: 10.3389/fenvs.2017.00029. 

Wang, B., W. Zhang, H. Li, H. Fu, X. Qu, and D. Zhu. 2017. Micropore clogging by leachable pyrogenic organic carbon: A new perspective on sorption irreversibility and kinetics of hydrophobic organic contaminants to black carbon. Environmental Pollution, 220, 1349–1358. DOI: 10.1016/j.envpol.2016.10.100.

Weyers, E., D.G. Strawn, D. Peak, A.L. Baker. 2017. Inhibition of phosphorus sorption on calcite by dairy manure-sourced DOC. Chemosphere 184:99-105.

Worton, D.R., M. Decker, G. Isaacman-VanWertz, A.W.H. Chan, K.R. Wilson and A.H. Goldstein, Improved molecular level identification of organic compounds using comprehensive two-dimensional chromatography, dual ionization energies and high resolution mass spectrometry, Analyst, 10.1039/C7AN00625J, 142, 2395–2403, 2017.

Yu, H., A. Guenther, D. Gu, C. Warneke, J. DeGouw, C. Geron, A. Goldstein, M. Graus, T. Karl, L. Kaser, P. Misztal, and B. Yuan, Airborne measurements of isoprene and monoterpene emissions from southeastern U.S. forests, Science of The Total Environment, http://doi.org/10.1016/j.scitotenv.2017.03.262, 595, 149–158, 2017.

Zaibon, S., S.H. Anderson, A.L. Thompson, N.R. Kitchen, C.J. Gantzer, and S.I. Haruna. 2017. Soil water infiltration affected by topsoil thickness in row crop and switchgrass production systems. Geoderma 286:46-53.

Zhao, Y., R. Saleh, G. Saliba, A.A. Presto, T.D. Gordon, G.T. Drozd, A.H. Goldstein, N.M. Donahue, and A.L. Robinson, Reducing secondary organic aerosol formation from gasoline vehicle exhaust, Proceedings of the National Academy of Sciences, Early Online Edition, doi: 10.1073/pnas.1620911114, 2017.

Abstracts/presentations

Alagele, S.M., S.H. Anderson, and R.P. Udawatta. 2017. Effects of management practices on soil hydraulic properties for claypan landscapes. 2017 American Society of Agronomy/Soil Science Society of America International Meeting Abstracts [CD-ROM]. October 22-25, Tampa, Florida.

Chen, Z., G.D. Bhalsod, Y. Shen, H. Li, and W. Zhang. 2017. Physicochemical controls on bioavailability of antibiotics to bacteria and plant. International Workshop of Soil Physics and the Nexus of Food, Energy and Water, August 3-5, Shenyang, China.

Fleetwood, M., S.H. Anderson, K. Goyne, M. Jiang, and X. Jiang. 2017. Evaluation of surface tension and infiltration of wetting agents. 2017 American Society of Agronomy/Soil Science Society of America International Meeting Abstracts [CD-ROM]. 22-25 October, Tampa, Florida.

He, J., Y. Zhang, H. Li, J. Yeom, and W. Zhang. 2017. ZnO nanowires effectively degrade cefalexin in water under ultraviolet light. EDAR 2017, 4^th International Symposium on the Environmental Dimension of Antibiotic Resistance, August 13-17, Lansing, Michigan.

Hettiarachchi, G.M., M. B. Galkaduwa, G. J. Kluitenberg, and S. L. Hutchinson. 2017. Poorly crystalline iron oxides minimize arsenic mobility in a water-saturated soil column system designed for flue-gas desulfurization wastewater treatment. The 14^th International Conference on Biogeochemistry of Trace Elements. July 16-20, Zurich, Switzerland.

Jeon, S., C.S. Krasnow, G.D. Bhalsod, H. Blair, M.K. Hausbeck, and W. Zhang. 2016. Pathogen filtration in recycled irrigation water to control plant disease outbreaks in greenhouse. ASA, CSSA, & SSSA International Annual Meeting, November 6-9, Phoenix, Arizona.

Li, Y., J.B. Sallach, W. Zhang, S.A. Boyd, and H. Li. 2017. Uptake of pharmaceuticals by radish from soil. EDAR 2017, 4^th International Symposium on the Environmental Dimension of Antibiotic Resistance, August 13-17Lansing, Michigan.

Li, Y., J.B. Sallach, W. Zhang, S.A. Boyd, and H. Li. 2017. Insight into distributions of pharmaceuticals in soil-water-radish systems. ASA, CSSA, & SSSA International Annual Meeting, October 22-25, Tampa, Florida.

Liu, C.-H., Y.-H. Chuang, H. Li, S.A. Boyd, and W. Zhang. 2016. Black carbon facilitated transport of lincomycin, oxytetracycline, and sulfamethoxazole in saturated sand. ASA, CSSA, & SSSA International Annual Meeting, November 6-9, Phoenix, Arizona.

Liu, C.-H., Y.-H. Chuang, H. Li, S.A. Boyd, B.J. Teppen, and W. Zhang. 2017. Black carbon nanoparticles facilitated transport of lincomycin, oxytetracycline, and sulfamethoxazole in saturated sand. EDAR 2017, 4^th International Symposium on the Environmental Dimension of Antibiotic Resistance, August 13-17, Lansing, Michigan.

Liu, C.-H., Y.-H. Chuang, H. Li, S.A. Boyd, and W. Zhang. 2016. Black carbon facilitated transport of lincomycin, oxytetracycline, and sulfamethoxazole in saturated sand. ASA, CSSA, & SSSA International Annual Meeting, November 6-9, Phoenix, Arizona.

Mainelis, G., L. Calderón, L. Yang, and K.B. Lee. 2017. Nanoparticle Release from Nanotechnology-enabled Clothing Products, Platform presentation at the Nanotech 2017 Conference and Expo. May 14-17, 2017, Washington, District of Columbia.

Rankoth, L.M., R.P. Udawatta, C.J. Gantzer, S. Jose, S.H. Anderson, and C. Weerasekara. 2017. Cover crop influence on soil water dynamics under corn-soybean rotation. 2017 American Society of Agronomy/Soil Science Society of America International Meeting Abstracts [CD-ROM]. 22-25 October, Tampa, Florida.

Shen, Y., G.D. Bhalsod, X. Guo, L. Yang, S. Jeon, R.D. Stedtfeld, J.M. Tiedje, H. Li, and W. Zhang. 2017. Distribution of antibiotic resistance genes in surface and overhead irrigated greenhouse lettuce. ASM Conference on Innovative Microbial Ecology for Mitigation of Antibiotic Resistance and Bacterial Diseases, March 22-25, Crystal City, Virginia.

Shen, Y., G.D. Bhalsod, X. Guo, S. Jeon, T. Stedtfeld, R.D. Stedtfeld, J.M. Tiedje, H. Li, and W. Zhang. 2017. Antibiotic stress changed microbial community and distribution of antibiotic resistance genes in surface and overhead irrigated greenhouse lettuce. EDAR 2017, 4^th International Symposium on the Environmental Dimension of Antibiotic Resistance, August 13-17, Lansing, Michigan.

Weeks, J.J. and G. M. Hettiarachchi. 2016. Fixing Phosphorus: Considering Cation Complexing Co-Applicants to Maintain Phosphorus Lability in Calcareous Soils. 2016. ASA/SSSA/CSA Annual Meetings Abstracts [CD-ROM], Nov. 6-9, Phoenix, Arizona.

Weeks, J.J. and G. M. Hettiarachchi. 2017. In Search of a Solution to Pollution: Improving Phosphorus Fertilizer Use Efficiency through Simple Formulation Alterations. 2017 American Society of Agronomy/Soil Science Society of America International Meeting Abstracts [CD-ROM]. 22-25 October, Tampa, Florida.

Weeks, J.J. and G. M. Hettiarachchi. 2017. Fixing Phosphorus: Considering Cation Complexing Co-Applicants to Maintain Phosphorus Lability in an Acid Soil. 2017 American Society of Agronomy/Soil Science Society of America International Meeting Abstracts [CD-ROM]. 22-25 October, Tampa, Florida.

Wickramarathne, N., R. Lerch, F. Liu, R.P. Udawatta, and S.H. Anderson. 2017. Groundwater nitrogen and phosphorus dynamics in a claypan watershed under crop management. 2017 American Society of Agronomy/Soil Science Society of America International Meeting Abstracts [CD-ROM]. 22-25 October, Tampa, Florida.

Zhang, W., H. Li, S.A. Boyd, and D. Zhu. 2016. Biochar technology in the nexus of food, energy, water, and soil Systems. 2016 China-US Joint Annual Symposium on “International Nexus of Food, Energy, Water, and Soil”, October 26-29, Yixing, China.

Zhang, W., C.-H. Liu, and T.S. Steenhuis. 2016. Versatility of the Langmuir equation is rooted in its theoretical and empirical nature. ASA, CSSA, & SSSA International Annual Meeting, November 6-9, Phoenix, Arizona.

Zhang, W., G.D. Bhalsod, Y.-H. Chuang, S. Jeon, W.J. Gui, and H. Li. 2016. Assessing and managing impact of pharmaceuticals in irrigation water on fresh produce safety. ASA, CSSA, & SSSA International Annual Meeting, November 6-9, Phoenix, Arizona.

Zhang, W., Y. Shen, G.D. Bhalsod, R.D. Stedtfeld, J.M. Tiedje, and H. Li. 2017. Pharmaceutical residues, antibiotic resistance genes, and bacterial communities in lettuce under overhead and surface Irrigation. ASA, CSSA, & SSSA International Annual Meeting, October 22-25, Tampa, Florida.

Zhang, W., C.-H. Liu, G.D. Bhalsod, Y. Shen, W.J. Gui, Y.-H. Chuang, R.D. Stedtfeld, J.M. Tiedje, B.J. Teppen, S.A. Boyd, and H. Li. 2017. Proliferation and mitigation of antibiotics and antibiotic resistance genes in soil, water and plant systems. EDAR 2017, 4^th International Symposium on the Environmental Dimension of Antibiotic Resistance, August 13-17, Lansing, Michigan.

Reports

Goldstein, A.H., A. Robinson, J. Kroll, G. Drozd, Y. Zhao, G. Saliba, R. Saleh, A. Presto, Investigating Semi-Volatile Organic Compound Emissions from Light-Duty Vehicles, Final Report, California Air Resources Board Award No. 12-318, February 20, 2017.

Scholarships

Weeks, Joseph (Jay) at Kansas State University, 2017 International Plant Nutrient Institute (IPNI) Scholar Award.