31,993 results match your criteria Environmental Science and Technology [Journal]


Bouncier Particles at Night: Biogenic Secondary Organic Aerosol Chemistry and Sulfate Drive Diel Variations in the Aerosol Phase in a Mixed Forest.

Environ Sci Technol 2019 Apr 19. Epub 2019 Apr 19.

Aerosol phase state is critical for quantifying aerosol effects on climate and air quality. However, significant challenges remain in our ability to predict and quantify phase state during its evolution in the atmosphere. Herein, we demonstrate that aerosol phase (liquid, semi-solid, solid) exhibits a diel cycle in a mixed forest environment, oscillating between a viscous, semi-solid phase state at night and liquid phase state with phase separation during the day. Read More

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http://dx.doi.org/10.1021/acs.est.8b07319DOI Listing

POLYBROMINATED DIPHENYL ETHERS AND BIPHENYL IN SERUM - TIME TREND STUDY FROM THE NATIONAL HEALTH AND NUTRITION EXAMINATION SURVEY FOR YEARS 2005/06 THROUGH 2013/14.

Environ Sci Technol 2019 Apr 19. Epub 2019 Apr 19.

Eleven polybrominated diphenyl ether (tri- to decaBDE) congeners and 2,2',4,4',5,5'-hexabromobiphenyl (BB153) have been measured in pooled samples from the National Health and Nutrition Examination Survey (NHANES) for one decade (from survey years 2005/06 through 2013/14). The pools, which are representative of the general noninstitutionalized population of the United States, encompassed thirty-two demographic groups defined by sex, race/ethnicity (Mexican American, non-Hispanic black, non-Hispanic white, all other race/ethnicities), and age (12-19, >20-39, >40-59, ≥60 years). The adjusted geometric means were determined for the six congeners (BDE28, BDE47, BDE99, BDE100, BDE153, BB153) with detectable concentrations in at least 60% of pools in each of the thirty-two demographic groups; the level of significance for pairwise comparisons thereof were determined. Read More

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http://dx.doi.org/10.1021/acs.est.9b00471DOI Listing

How do richness and composition of diet shape trace metal exposure in a free-living generalist rodent, Apodemus sylvaticus.

Environ Sci Technol 2019 Apr 19. Epub 2019 Apr 19.

Exposure of terrestrial mammals to chemical contaminants like trace metals (TMs) is considered to be mainly based on trophic transfer. Although relationships between TM transfer to animals and identity of contaminated food have been studied, the variation of the TM transfer with respect to diet diversity has been poorly documented. In this study, the oral exposure to TMs of wood mice Apodemus sylvaticus was investigated with respect to both the number of different items, i. Read More

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http://dx.doi.org/10.1021/acs.est.8b07194DOI Listing

Novel Concepts for Novel Entities: Updating Ecotoxicology for a Sustainable Anthropocene.

Environ Sci Technol 2019 Apr 19. Epub 2019 Apr 19.

Leibniz- Institute of Freshwater Ecology and Inland Fisheries . Berlin , Germany.

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http://dx.doi.org/10.1021/acs.est.9b02031DOI Listing

Occurrence and degradation potential of fluoroalkylsilane substances as precursors of perfluoroalkyl carboxylic acids.

Environ Sci Technol 2019 Apr 19. Epub 2019 Apr 19.

Polyfluoroalkylsilanes (PFASis) substances are a class of artificial chemicals with wide applications in surface coating, which arouse attention due to the hydrophobic/oleophobic properties and potential biological effects. In this study, a robust high-resolution mass spectrometry method through direct injection into Fourier transform ion cyclotron resonance instrument was established, with the aid of CF2-scaled Kendrick mass defect analysis and isotope fine structure elucidation. The occurrence of 8:2 polyfluoroalkyl trimethoxysilane (8:2 PTrMeOSi ) and 8:2 polyfluoroalkyl triethoxysilane (8:2 PTrEtOSi ), as well as their cationic adducts, solvent substitutions and other compound analogues, were identified in commercial anti-fingerprint liquid products. Read More

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http://dx.doi.org/10.1021/acs.est.9b00690DOI Listing

Fate and transformation of graphene oxide in estuarine and marine waters.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

The possibility of graphene oxide (GO) exposure to the environment has spurred several studies investigating the fate of this nanoparticle (NP). However, there is currently little or no data on the fate of GO in estuarine and marine waters. This study investigated the aggregation, sedimentation and transformation of GO in saline waters, considering the role of salinity (0-50 ‰), light (visible light and solar irradiation), aging, among others. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.8b06485
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http://dx.doi.org/10.1021/acs.est.8b06485DOI Listing
April 2019
5 Reads

Organic Functional Group Chemistry in Mineralized Deposits containing U(IV) and U(VI) from the Jackpile Mine in New Mexico.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

We investigated the functional group chemistry of natural organic matter (NOM) associated with both U(IV) and U(VI) in solids from mineralized deposits exposed to oxidizing conditions from the Jackpile Mine, Laguna Pueblo, NM. The Uranium (U) content in unreacted samples was 0.44% to 2. Read More

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http://dx.doi.org/10.1021/acs.est.9b00407DOI Listing

Selecting household water treatment options on the basis of World Health Organization performance testing protocols.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

The World Health Organization's International Scheme to Evaluate Household Water Treatment Technologies serves to benchmark microbiological performance of existing and novel technologies and processes for small-scale drinking water treatment according to a tiered system. There is widespread uncertainty around which tiers of performance are most appropriate for technology selection and recommendation in humanitarian response or for routine safe water programming. We used quantitative microbial risk assessment (QMRA) to evaluate attributable reductions in diarrheal disease burden associated with water treatment technologies meeting the three tiers of performance under this Scheme, across a range of conditions. Read More

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http://dx.doi.org/10.1021/acs.est.8b05682DOI Listing

Photomineralization of Effluent Organic Phosphorus to Orthophosphate under Simulated Light Illumination.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , P. R. China.

Organic phosphorus (OP), one of the main forms of phosphorus in effluent from biological wastewater treatment plants, may contribute to the bioavailable phosphorus pool as well as water eutrophication. However, little is known about the photomineralization of OP or the possible impacts on the phosphorus cycle in water bodies. Herein, the photomineralization of effluent OP was investigated. Read More

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http://dx.doi.org/10.1021/acs.est.9b00348DOI Listing

Characterizing Properties and Environmental Behaviors of Dissolved Organic Matter Using Two-Dimensional Correlation Spectroscopic Analysis.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

Dissolved organic matter (DOM) exists ubiquitously in environments and plays critical roles in pollutant mitigation, transformation and organic geochemical cycling. Understanding its properties and environmental behaviors is critically important to develop water treatment processes and environmental remediation strategies. Generalized two-dimensional correlation spectroscopy (2DCOS), which has numerous advantages including enhancing spectral resolution and discerning specific order of structural change under an external perturbation, could be used as a powerful tool to interpret a wide range of spectroscopic signatures relating to DOM. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.9b01103
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http://dx.doi.org/10.1021/acs.est.9b01103DOI Listing
April 2019
1 Read

One-step treatment of phosphite-laden wastewater: A single electrochemical reactor integrating superoxide radical-induced oxidation and electrocoagulation.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

Elimination of phosphite from water is more difficult than elimination of phosphate owing to its higher solubility and resistance to biotransformation. Herein, we report an efficient, facile electrochemical method integrating electrooxdiation (EO) and electrocoagulation (EC) to treat phosphite-laden wastewater. The mechanistic studies demonstrate that in situ-generated Fe2+ at an Fe anode can react with in situ-generated O2 at a mixed metal oxide (MMO) anode, leading to formation of •O2-, a reactive species predominantly responsible for oxidation of phosphite to phosphate. Read More

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http://dx.doi.org/10.1021/acs.est.9b00841DOI Listing

Tracing molybdenum attenuation in mining environments using molybdenum stable isotopes.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

Molybdenum contamination is a concern in mining regions worldwide. Better understanding of processes controlling Mo mobility in mine wastes is critical for assessing potential impacts and developing water-quality management strategies associated to this element. Here, we used Mo stable isotope (δMo) analyses to investigate geochemical controls on Mo mobility within a tailings management facility (TMF) featuring oxic and anoxic environments. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.9b00766
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http://dx.doi.org/10.1021/acs.est.9b00766DOI Listing
April 2019
1 Read

PCB Emissions from Paint Colorants.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

Department of Civil & Environmental Engineering, IIHR-Hydroscience and Engineering , The University of Iowa , Iowa City , Iowa 52242 , United States.

Polychlorinated biphenyls (PCBs) are known human carcinogens that are byproducts of pigment manufacturing and found in colorants used to tint consumer paints sold in the United States and elsewhere. PCBs have the potential to be emitted from paint containing these pigments. To quantify the gas-phase emissions of ∑PCBs, we used polyurethane foam (PUF) to capture emissions from freshly applied colorants. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.9b01087
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http://dx.doi.org/10.1021/acs.est.9b01087DOI Listing
April 2019
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Insights into Heteroatom-Doped Graphene for Catalytic Ozonation: Active Centers, Reactive Oxygen Species Evolution, and Catalytic Mechanism.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

To guide the design of novel graphene-based catalysts in catalytic ozonation for micro-pollutant degradation, the mechanism of catalytic ozonation with heteroatom-doped graphene was clarified. Reduced graphene oxide doped with nitrogen, phosphorus, boron, and sulfur atoms (N-, P-, B-, and S-rGO) were synthesized and their catalytic ozonation performances were evaluated in the degradation of refractory organics and bromate elimination simultaneously. Doping with heteroatoms, except sulfur, significantly improved the catalytic ozonation activity of graphene. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.9b01361
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http://dx.doi.org/10.1021/acs.est.9b01361DOI Listing
April 2019
1 Read

In situ measurements of explosive compound dissolution fluxes from exposed munition material in the Baltic Sea.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

Underwater munitions containing millions of tons of toxic explosives are present worldwide in coastal marine waters as a result of unexploded ordnance and intentional dumping. Dissolution flux of solid explosives following corrosion of metal munition housings controls exposure of biological receptors to toxic munition compounds (MC; including TNT: 2,4,6-Trinitrotoluene, RDX: 1,3,5-Trinitro-1,3,5-triazinane, and DNB: 1,3-Dinitrobenzene). Very little is known about the dissolution behavior of MC in the marine environment. Read More

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http://dx.doi.org/10.1021/acs.est.8b06974DOI Listing

Estimated Long-term (1981-2016) Concentrations of Ambient Fine Particulate Matter across North America from Chemical Transport Modeling, Satellite Remote Sensing and Ground-based Measurements.

Environ Sci Technol 2019 Apr 17. Epub 2019 Apr 17.

Accurate data concerning historical fine particulate matter (PM2.5) concentrations are needed to assess long-term changes in exposure and associated health risks. We estimated historical PM2. Read More

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http://dx.doi.org/10.1021/acs.est.8b06875DOI Listing

Potential consequences of regional species loss for global species richness - a quantitative approach for estimating global extinction probabilities.

Environ Sci Technol 2019 Apr 17. Epub 2019 Apr 17.

Because the biosphere is highly heterogeneous, species diversity impacts are typically assessed at local or regional scales. Since regional species richness impact metrics refer to different species compositions, they cannot be easily compared or aggregated to global impacts. Translating regional species richness impacts into global impacts allows for comparisons between impacts and facilitates the estimation of global species extinctions. Read More

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http://dx.doi.org/10.1021/acs.est.8b06173DOI Listing

On-Board Sensor-Based NO Emissions from Heavy-Duty Diesel Vehicles.

Environ Sci Technol 2019 Apr 17. Epub 2019 Apr 17.

Real-world nitrogen oxides (NO) emissions were estimated using on-board sensor readings from 72 heavy-duty diesel vehicles (HDDVs) equipped with Selective Catalytic Reduction (SCR) system in California. The results showed that there were large differences between in-use and certification NO emissions, with 12 HDDVs emitted more than three times the standard during hot-running and idling operations in the real world. The overall NO conversion efficiencies of the SCR system on many vehicles were well below the 90% threshold that is expected for an efficient SCR system, even when the SCR system was above the optimum operating temperature threshold of 250°C. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.8b07048
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http://dx.doi.org/10.1021/acs.est.8b07048DOI Listing
April 2019
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Microbial turnover of glyphosate to biomass: utilization as nutrient source, formation of AMPA and biogenic NER in an OECD 308 test.

Environ Sci Technol 2019 Apr 17. Epub 2019 Apr 17.

Environmental fate assessment of chemicals involves standardized simulation tests with isotope-labeled molecules to balance transformation, mineralization, and formation of non-extractable residues (NER). Methods to predict microbial turnover and biogenic NER have been developed, having limited use when metabolites accumulate, the chemicals are not the only C source, or provides for other macro-elements. To improve predictive capability, we extended a recently developed method for microbial growth yield estimation for incomplete degradation and multiple-element assimilation and combined it with a dynamic model for fate description in soils and sediments. Read More

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http://dx.doi.org/10.1021/acs.est.9b01259DOI Listing

Silicon availability from chemically diverse fertilizers and secondary raw materials.

Environ Sci Technol 2019 Apr 17. Epub 2019 Apr 17.

Crops may require Si fertilization to sustain yields. Potential Si fertilizers include industrial by-products (e.g. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.8b06597
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http://dx.doi.org/10.1021/acs.est.8b06597DOI Listing
April 2019
3 Reads

Historical Black Carbon Reconstruction from the Lake Sediments of the Himalayan - Tibetan Plateau.

Environ Sci Technol 2019 Apr 17. Epub 2019 Apr 17.

Black Carbon (BC) is one of the major drivers of climate change and its measurement in different environment is crucial for better understanding of long-term trend in Himalayan-Tibetan Plateau (HTP) as climate warming has intensified in the region. We present measurement of BC concentration from six lake sediments in HTP to reconstruct historical BC deposition since the preindustrial era. Our results show an increasing trend of BC, concurrent with increased anthropogenic emission pattern after the commencement of an industrialization era during the 1950s. Read More

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http://dx.doi.org/10.1021/acs.est.8b07025DOI Listing

Modifying the Parboiling of Rice to Remove Inorganic Arsenic, While Fortifying with Calcium.

Environ Sci Technol 2019 Apr 17. Epub 2019 Apr 17.

Institute for Global Food Security , Queen's University Belfast , David Keir Building, Malone Road , Belfast BT9 5BN , Northern Ireland.

Using village-based rice processing plants in rural Bangladesh, this study considered how parboiling rice could be altered to reduce the content of the carcinogen inorganic arsenic. Parboiling is normally conducted with rough rice (i.e. Read More

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http://dx.doi.org/10.1021/acs.est.8b06548DOI Listing
April 2019
3 Reads

Identification of Per- and Polyfluoroalkyl Substances in the Cape Fear River by High Resolution Mass Spectrometry and Nontargeted Screening.

Environ Sci Technol 2019 Apr 17. Epub 2019 Apr 17.

National Exposure Research Laboratory , U.S. Environmental Protection Agency , Research Triangle Park , Durham , North Carolina 27711 , United States.

Ongoing chemical development in response to regulation of historical perfluorinated compounds, (i.e., perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS)) has resulted in a proliferation of novel per- and polyfluorinated species. Read More

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http://dx.doi.org/10.1021/acs.est.8b06017DOI Listing

Determinants of Exposure to Pyrethroid Insecticides in the VHEMBE Cohort, South Africa.

Environ Sci Technol 2018 Nov 17;52(21):12108-12121. Epub 2018 Oct 17.

Center for Environmental Research and Children's Health (CERCH), School of Public Health , University of California at Berkeley , Berkeley , California 94720 , United States.

Exposure to pyrethroid insecticides has been linked to adverse health effects, and can originate from several sources, including indoor residual spraying (IRS) for malaria control, home pest control, food contamination, and occupational exposure. We aimed to explore the determinants of urinary pyrethroid metabolite concentrations in a rural population with high pesticide use. The Venda Health Examination of Mothers, Babies and their Environment (VHEMBE) is a birth cohort of 752 mother-child pairs in Limpopo, South Africa. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.8b02767
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http://dx.doi.org/10.1021/acs.est.8b02767DOI Listing
November 2018
1 Read

Human-Associated Indicator Bacteria and Human-Specific Viruses in Surface Water: A Spatial Assessment with Implications on Fate and Transport.

Environ Sci Technol 2018 Nov 15;52(21):12162-12171. Epub 2018 Oct 15.

U.S. Geological Survey, Upper Midwest Water Science Center , 8505 Research Way , Middleton , Wisconsin 53562 , United States.

Hydrologic, seasonal, and spatial variability of sewage contamination was studied at six locations within a watershed upstream from water reclamation facility (WRF) effluent to define relative loadings of sewage from different portions of the watershed. Fecal pollution from human sources was spatially quantified by measuring two human-associated indicator bacteria (HIB) and eight human-specific viruses (HSV) at six stream locations in the Menomonee River watershed in Milwaukee, Wisconsin from April 2009 to March 2011. A custom, automated water sampler, which included HSV filtration, was deployed at each location and provided unattended, flow-weighted, large-volume (30-913 L) sampling. Read More

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http://dx.doi.org/10.1021/acs.est.8b03481DOI Listing
November 2018

Environmental Science & Technology Presents the 2018 Reviewer Awards.

Authors:
David L Sedlak

Environ Sci Technol 2018 Nov;52(21):11971-11972

Department of Civil & Environmental Engineering , University of California, Berkeley , Berkeley , California 94720 , United States.

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http://dx.doi.org/10.1021/acs.est.8b05703DOI Listing
November 2018

Impact of Organic Matter on Iron(II)-Catalyzed Mineral Transformations in Ferrihydrite-Organic Matter Coprecipitates.

Environ Sci Technol 2018 Nov 16;52(21):12316-12326. Epub 2018 Oct 16.

Soil Chemistry Group, Institute of Biogeochemistry and Pollutant Dynamics, Department of Environmental Systems Science , ETH Zurich , Universitätstrasse 16, CHN , CH-8092 Zurich , Switzerland.

Poorly crystalline Fe(III) (oxyhydr)oxides like ferrihydrite are abundant in soils and sediments and are often associated with organic matter (OM) in the form of mineral-organic aggregates. Under anoxic conditions, interactions between aqueous Fe(II) and ferrihydrite lead to the formation of crystalline secondary minerals, like lepidocrocite, goethite, or magnetite. However, the extent to which Fe(II)-catalyzed mineral transformations are influenced by ferrihydrite-associated OM is not well understood. Read More

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http://dx.doi.org/10.1021/acs.est.8b03206DOI Listing
November 2018

Biodegradation of Polystyrene by Dark ( Tenebrio obscurus) and Yellow ( Tenebrio molitor) Mealworms (Coleoptera: Tenebrionidae).

Environ Sci Technol 2019 Apr 16. Epub 2019 Apr 16.

Yellow mealworms (larvae of Tenebrio molitor, Coleoptera: Tenebrionidae) have been proven capable of biodegrading polystyrene (PS) products. Using four geographic sources, we found that dark mealworms (larvae of Tenebrio obscurus) ate PS as well. We subsequently tested T. Read More

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http://dx.doi.org/10.1021/acs.est.8b06963DOI Listing

Growth Characteristics and Thermodynamics of Syntrophic Acetate Oxidizers.

Environ Sci Technol 2019 Apr 16. Epub 2019 Apr 16.

Syntrophic acetate oxidation (SAO) plays a pivotal role in biogas production processes when aceticlastic methanogens are inhibited. Despite the importance of SAO, the metabolic interactions and syntrophic growth of the organisms involved are still poorly understood. Therefore we studied growth parameters and interactions within constructed defined co-cultures comprising the methanogen Methanoculleus bourgensis and one, or several, of the syntrophic acetate oxidizers Syntrophaceticus schinkii, [Clostridium] ultunense, Tepidanaerobacter acetatoxydans, and a novel, uncharacterized bacterium. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.9b00288
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http://dx.doi.org/10.1021/acs.est.9b00288DOI Listing
April 2019
1 Read

Time-Resolved Measurements of Indoor Chemical Emissions, Deposition, and Reactions in a University Art Museum.

Environ Sci Technol 2019 Apr 16. Epub 2019 Apr 16.

A six-week study was conducted at the University of Colorado Art Museum during which volatile organic compounds (VOCs), CO, O, NO, NO, other trace gases, and submicron aerosol were measured continuously. These measurements were then analyzed using a box model to quantify the rates of major processes that transformed the composition of the air. VOC emission factors were quantified for museum occupants and their activities. Read More

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http://dx.doi.org/10.1021/acs.est.9b00276DOI Listing

Assessing the air-surface exchange and fate of mercury in a subtropical forest using a novel passive exchange-meter device.

Environ Sci Technol 2019 Apr 16. Epub 2019 Apr 16.

A novel passive exchange meter (EM) device was developed based on the mass balance approach, and on the use of 202Hg as field internal standard. It simultaneously and dynamically resolves Hg budgets in vegetation litter and assess the fate of Hg in the air and forest soil interface. Measurements of Hg fluxes were carried out in a subtropical forest ecosystem during a full year. Read More

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http://dx.doi.org/10.1021/acs.est.8b06343DOI Listing

In Situ Intermediates Determination and Cytotoxicological Assessment in Catalytic Oxidation of Formaldehyde: Implications for Catalyst Design and Selectivity Enhancement under Ambient Conditions.

Environ Sci Technol 2019 Apr 16. Epub 2019 Apr 16.

Formation and decay of formaldehyde oxides (CH2OO) affect the complete oxidation of formaldehyde. However, the speciation and reactivity of CH2OO are poorly understood because of its extremely fast kinetics and indirect measurements. Herein, three isomers of CH2OO (i. Read More

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http://dx.doi.org/10.1021/acs.est.8b06234DOI Listing
April 2019
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Ru/CeO2 Catalyst with Optimized CeO2 Support Morphology and Surface Facet for Propane Combustion.

Environ Sci Technol 2019 Apr 16. Epub 2019 Apr 16.

Tailoring the interfaces between active metal centers and supporting materials is an efficient strategy to obtain a superior catalyst for a certain reaction. Herein, an active interface between Ru and CeO2 was identified and constructed by adjusting the morphology of CeO2 support, such as rods (R), cubes (C) and octahedra (O), to optimize both the activity and stability of Ru/CeO2 catalyst for propane combustion. We found that the morphology of CeO2 support does not significantly affect the chemical states of Ru species, but controls the interaction between the Ru and CeO2, leading to the tuning of oxygen vacancy in the CeO2 surface around the Ru-CeO2 interface. Read More

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http://dx.doi.org/10.1021/acs.est.9b01929DOI Listing

Enhanced Permanganate Oxidation of Sulfamethoxazole and Removal of Dissolved Organics with Biochar: Formation of Highly Oxidative Manganese Intermediate Species and in-situ Activation of Biochar.

Environ Sci Technol 2019 Apr 15. Epub 2019 Apr 15.

Sulfamethoxazole (SMX) is a broad-spectrum antibiotic and was largely used in breeding industry. The reaction rate of SMX with KMnO4 is slow, and the adsorption efficiency of biochar for SMX was inferior (less than 11% in 30 min). By adding biochar powder into SMX solution with addition of permanganate, the oxidation ratio of SMX surged to 97% in 30 min, and over 58% of the total organic carbon (TOC) was simultaneously removed. Read More

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http://dx.doi.org/10.1021/acs.est.9b00180DOI Listing

Increased methylmercury accumulation in rice after straw amendment.

Environ Sci Technol 2019 Apr 15. Epub 2019 Apr 15.

Consumption of rice has been shown to be an important route of dietary exposure to methylmercury (MeHg, a neurotoxin) for Asians having a low fish but high rice diet. Therefore, factors that increase MeHg production and bioaccumulation in soil-rice systems, could enhance the risk of MeHg exposure. Based on a national-scale survey in China (64 sites in 12 provinces) and rice cultivation experiments, we report that straw amendment, a globally prevalent farming practice, could increase MeHg concentrations in paddy soils (11-1043%) and rice grains (95%). Read More

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http://dx.doi.org/10.1021/acs.est.8b07145DOI Listing

Long-term changes in precipitation and temperature have already impacted nitrogen loading.

Environ Sci Technol 2019 Apr 12. Epub 2019 Apr 12.

Increases in nitrogen loading over the past several decades have led to widespread water quality impairments across the U.S. Elevated awareness of the influence of climate variability on nitrogen loading has led to several studies investigating future climate change impacts on water quality. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.8b06898
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http://dx.doi.org/10.1021/acs.est.8b06898DOI Listing
April 2019
5 Reads

RNA stable isotope probing of potential Feammox population in paddy soil.

Environ Sci Technol 2019 Apr 12. Epub 2019 Apr 12.

Anaerobic ammonium oxidation coupled to iron reduction (Feammox) is a recently discovered pathway contributing to nitrogen loss in various ecosystems such as paddy soils and sediments. However, little is known about the microbes driving Feammox in agricultural ecosystem. Here, we demonstrated the occurrence of Feammox in paddy soils of Southern China by using a 15N isotopic tracing technique, and examined the microbial communities associated with Feammox using RNA based stable isotope probing (RNA-SIP) combined with Illumina sequencing. Read More

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http://dx.doi.org/10.1021/acs.est.8b05016DOI Listing
April 2019
2 Reads

Sunlight-Mediated Lead and Chromium Release from Commercial Lead Chromate Pigments in Aqueous Phase.

Environ Sci Technol 2019 Apr 12. Epub 2019 Apr 12.

Lead chromate pigments are a group of most widely-used pigments, which account for 3% of the worldwide lead consumption. This study reports the photoactivity of commercial lead chromate pigment (i.e. Read More

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http://dx.doi.org/10.1021/acs.est.8b06839DOI Listing

Electrospun nanofiber membranes incorporating PDMS-aerogel superhydrophobic coating with enhanced flux and improved anti-wettability in membrane distillation.

Environ Sci Technol 2019 Apr 12. Epub 2019 Apr 12.

Electrospun nanofiber membranes (ENMs) have garnered increasing interest due to their controllable nanofiber structure and high void volume fraction properties in membrane distillation (MD). However, MD technology still faces limitations mainly due to low permeate flux and membrane wetting for feeds containing low surface tension compounds. Perfluorinated superhydrophobic membranes could be an alternative, but it has negative environmental impacts. Read More

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http://dx.doi.org/10.1021/acs.est.8b07254DOI Listing

Tissue-Specific Accumulation, Sexual Difference, and Maternal Transfer of Chlorinated Paraffins in Black-Spotted Frogs.

Environ Sci Technol 2019 Apr 19. Epub 2019 Apr 19.

Department of Environmental Science and Analytical Chemistry , Stockholm University , SE-10691 Stockholm , Sweden.

The restriction on usage of short-chain chlorinated paraffins (SCCPs) under Stockholm Convention may promote the production and application of medium chain chlorinated paraffins (MCCPs) and long chain chlorinated paraffins (LCCPs) as substitutes. This study focused on the tissue-specific exposure to SCCPs, MCCPs, and LCCPs in black-spotted frog, a prevalent amphibian species in the Yangtze River Delta, China. The total CP concentrations in frog liver, muscle, and egg samples ranged of 35-1200, 6. Read More

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http://dx.doi.org/10.1021/acs.est.8b06350DOI Listing

Geochemical Stability of Dissolved Mn(III) in the Presence of Pyrophosphate as a Model Ligand: Complexation and Disproportionation.

Environ Sci Technol 2019 Apr 11. Epub 2019 Apr 11.

Dissolved Mn(III) species have recently been recognized as a significant form of Mn in redox transition zones, but their speciation, stability and reactivity are poorly understood. Besides acting as the intermediate for Mn redox chemistry, Mn(III) can undergo disproportionation producing insoluble Mn oxides and aqueous Mn(II). Using pyrophosphate(PP) as a model ligand, we evaluated the thermodynamic and kinetic stability of Mn(III) complexes. Read More

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http://dx.doi.org/10.1021/acs.est.9b00498DOI Listing

Hydrophilic Silver Nanoparticles Induce Selective Nanochannels in Thin Film Nanocomposite Polyamide Membranes.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

Department of Civil Engineering , The University of Hong Kong , Pokfulam , Hong Kong.

Thin-film nanocomposite (TFN) membranes have been widely studied over the past decade for their desalination applications. For some cases, the incorporation of nonporous hydrophilic nanofillers has been reported to greatly enhance membrane separation performance, yet the underlying mechanism is poorly understood. The current study systematically investigates TFN membranes incorporated with silver nanoparticles (AgNPs). Read More

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http://dx.doi.org/10.1021/acs.est.9b00473DOI Listing

Antimonite complexation with thiol and carboxyl/phenol groups of peat organic matter.

Environ Sci Technol 2019 Apr 11. Epub 2019 Apr 11.

Peatlands and other wetlands with abundant natural organic matter (NOM) are important sinks for antimony (Sb). While formation of Sb(III) sulfide phases or Sb(III) binding to NOM are discussed to decrease Sb mobility, the exact binding mechanisms remain elusive. Here, we reacted increasing sulfide concentrations with purified model peat at pH 6, forming reduced organic sulfur species, and subsequently equilibrated the reaction products with 50 µM antimonite under anoxic conditions. Read More

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http://dx.doi.org/10.1021/acs.est.9b00495DOI Listing
April 2019
5.330 Impact Factor

Metabolomics of Children and Adolescents Exposed to Industrial Carcinogenic Pollutants.

Environ Sci Technol 2019 Apr 11. Epub 2019 Apr 11.

Studies on metabolomes of carcinogenic pollutants among children and adolescents are limited. We aim to identify metabolic perturbations in 107 children and adolescents (aged 9-15) exposed to multiple carcinogens in a polluted area surrounding the largest petrochemical complex in Taiwan. We measured urinary concentrations of eight carcinogen exposure biomarkers (heavy metals and polycyclic aromatic hydrocarbons (PAHs) represented by 1-hydroxypyrene), and urinary oxidative stress biomarkers and serum acylcarnitines as biomarkers of early health effects. Read More

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http://dx.doi.org/10.1021/acs.est.9b00392DOI Listing

Combined deterministic and stochastic processes control microbial succession in replicate granular biofilm reactors.

Environ Sci Technol 2019 Apr 10. Epub 2019 Apr 10.

Granular sludge is an efficient and compact biofilm process for wastewater treatment. However, the ecological factors involved in microbial community assembly during the granular biofilm formation are poorly understood and little is known about the reproducibility of the process. Here, three replicate bioreactors were used to investigate microbial succession during the formation of granular biofilms. Read More

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http://dx.doi.org/10.1021/acs.est.8b06669DOI Listing

Low Molecular Weight Organic Acid Complexation Affects Antimony(III) Adsorption by Granular Ferric Hydroxide.

Environ Sci Technol 2019 Apr 10. Epub 2019 Apr 10.

Antimony(III) mobility in natural aquatic environments is generally enhanced by dissolved organic matter. Tartaric acid is often used to form complexes with and stabilize dissolved Sb(III) in adsorption studies. However, competition between such low molecular organic acid complexation and adsorption of Sb(III) has received little attention, which prompted us to measure Sb(III) adsorption by iron oxyhydroxide adsorbents commonly used in water treatment plants. Read More

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http://dx.doi.org/10.1021/acs.est.8b06297DOI Listing

Addition to Metals in the European Marine Strategies Legislation: A Challenge for the Managers and Decision-Makers.

Environ Sci Technol 2019 Apr 10. Epub 2019 Apr 10.

ICMAN-Instituto de Ciencias Marinas de Andalucía (CSIC) . Campus Universitario Río San Pedro , 11510 Puerto Real , Cádiz . Spain.

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http://dx.doi.org/10.1021/acs.est.9b01851DOI Listing

Tracing the Dynamic Changes of Element Profiles by Novel Soil Porewater Samplers with Ultralow Disturbance to Soil-Water Interface.

Environ Sci Technol 2019 Apr 19. Epub 2019 Apr 19.

Department of Health and Environmental Sciences , Xi'an Jiaotong-Liverpool University , 111 Ren'ai Road , Suzhou , Jiangsu 215123 , P. R. China.

In flooded soils, soil-water interface (SWI) is the key zone controlling biogeochemical dynamics. Chemical species and concentrations vary greatly at micro- to cm-scales. Techniques able to track these changing element profiles both in space and over time with appropriate resolution are rare. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.8b05390
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http://dx.doi.org/10.1021/acs.est.8b05390DOI Listing
April 2019
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Efficiency and Carbon Footprint of the German Meat Supply Chain.

Environ Sci Technol 2019 Apr 10. Epub 2019 Apr 10.

SDU Life Cycle Engineering, Department of Chemical Engineering, Biotechnology, and Environmental Technology , University of Southern Denmark , 5230 Odense , Denmark.

Meat production and consumption contribute significantly to environmental impacts such as greenhouse gas (GHG) emissions. These emissions can be reduced via various strategies ranging from production efficiency improvement to process optimization, food waste reduction, trade pattern change, and diet structure change. On the basis of a material flow analysis approach, we mapped the dry matter mass and energy balance of the meat (including beef, pork, and poultry) supply chain in Germany and discussed the emission reduction potential of different mitigation strategies in an integrated and mass-balance consistent framework. Read More

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http://pubs.acs.org/doi/10.1021/acs.est.8b06079
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http://dx.doi.org/10.1021/acs.est.8b06079DOI Listing
April 2019
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Observing Severe Drought Influences on Ozone Air Pollution in California.

Environ Sci Technol 2019 Apr 10. Epub 2019 Apr 10.

Department of Environmental Sciences , University of Virginia , Charlottesville , Virginia 22904 , United States.

Drought conditions affect ozone air quality, potentially altering multiple terms in the O mass balance equation. Here, we present a multiyear observational analysis using data collected before, during, and after the record-breaking California drought (2011-2015) at the O-polluted locations of Fresno and Bakersfield near the Sierra Nevada foothills. We separately assess drought influences on O chemical production ( PO) from O concentration. Read More

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http://dx.doi.org/10.1021/acs.est.8b04852DOI Listing