journal
https://read.qxmd.com/read/38810222/isotope-data-constrains-redox-chemistry-of-atmospheric-mercury
#1
JOURNAL ARTICLE
Zhengcheng Song, Shaojian Huang, Peng Zhang, Tengfei Yuan, Yanxu Zhang
The redox chemistry of mercury (Hg) in the atmosphere exerts a significant influence on its global cycle. However, our understanding of this important process remains shrouded in uncertainty. In this study, we utilize three-dimensional atmospheric Hg isotope modeling to evaluate the isotopic composition of particle-bound mercury [HgII (P)] in the global atmosphere. We investigate various chemistry mechanisms and find that they induce remarkably disparate odd-number mass-independent fractionation (odd-MIF) in HgII (P) on a global scale...
May 29, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38810213/integrative-active-sites-of-cathode-for-electron-oxygen-proton-coupling-to-favor-h-2-o-2-production-in-a-photoelectrochemical-system
#2
JOURNAL ARTICLE
Shan Li, Lei Chen, Jian Wang, Tian Liu, Dawei Li, Zhi Yang, Xin Xiao, Chiheng Chu, Baoliang Chen
The oxygen reduction process generating H2 O2 in the photoelectrochemical (PEC) system is milder and environmentally friendly compared with the traditional anthraquinone process but still lacks the efficient electron-oxygen-proton coupling interfaces to improve H2 O2 production efficiency. Here, we propose an integrated active site strategy, that is, designing a hydrophobic C-B-N interface to refine the dearth of electron, oxygen, and proton balance. Computational calculation results show a lower energy barrier for H2 O2 production due to synergistic and coupling effects of boron sites for O2 adsorption, nitrogen sites for H+ binding, and the carbon structure for electron transfer, demonstrating theoretically the feasibility of the strategy...
May 29, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38810212/factors-determining-black-carbon-exposures-among-pregnant-women-enrolled-in-the-hapin-trial
#3
JOURNAL ARTICLE
Devan A Campbell, Michael Johnson, Ricardo Piedrahita, Ajay Pillarisetti, Lance A Waller, Katherine A Kearns, Jacob Kremer, Erick Mollinedo, Jeremy A Sarnat, Maggie L Clark, Lindsay J Underhill, John P McCracken, Anaité Diaz-Artiga, Kyle Steenland, Ghislaine Rosa, Miles A Kirby, Kalpana Balakrishnan, Sankar Sambandam, Krishnendu Mukhopadhyay, Saritha Sendhil, Amudha Natarajan, Florien Ndagijimana, Ephrem Dusabimana, Lisa M Thompson, William Checkley, Laura Nicolaou, Stella Hartinger, Jennifer L Peel, Thomas F Clasen, Luke P Naeher
Residential biomass burning is an important source of black carbon (BC) exposure among rural communities in low- and middle-income countries. We collected 7165 personal BC samples and individual/household level information from 3103 pregnant women enrolled in the Household Air Pollution Intervention Network trial. Women in the intervention arm received free liquefied petroleum gas stoves and fuel throughout pregnancy; women in the control arm continued the use of biomass stoves. Median (IQR) postintervention BC exposures were 9...
May 29, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38809112/deciphering-the-impact-of-zno-nanoparticles-and-a-sunscreen-product-containing-zno-on-phosphorus-dynamics-and-release-in-chlorella-pyrenoidosa-in-aquatic-systems
#4
JOURNAL ARTICLE
Manman Cao, Fei Wang, Shuai Ma, Safdar Bashir, Shuhu Liu, Ke Sun, Baoshan Xing
Zinc oxide nanoparticles (ZnO NPs) expedite the conversion of organic phosphorus (OP) into PO4 -P (Pi), facilitating phosphorus (P) absorption by algae. Our study explored the mechanisms of converting OP (2-aminoethylphosphonic acid (AEP) and β-glycerol phosphate (β-GP)) into Pi in Chlorella pyrenoidosa under P deficiency with sunscreen and ZnO NPs. Cell density followed the order of K2 HPO4 > β-GP+ZnO > β-GP > AEP+ZnO > AEP > P-free. ZnO NPs promoted the conversion of β-GP, containing C-O-P bonds (0...
May 29, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38809092/bovine-serum-albumin-bends-over-backward-to-interact-with-aged-plastics-a-model-for-understanding-protein-attachment-to-plastic-debris
#5
JOURNAL ARTICLE
Margaret M Elmer-Dixon, Liam P Fawcett, Emma N Sorensen, Melissa A Maurer-Jones
Plastic pollution, a major environmental crisis, has a variety of consequences for various organisms within aquatic systems. Beyond the direct toxicity, plastic pollution has the potential to absorb biological toxins and invasive microbial species. To better understand the capability of environmental plastic debris to adsorb these species, we investigated the binding of the model protein bovine serum albumin (BSA) to polyethylene (PE) films at various stages of photodegradation. Circular dichroism and fluorescence studies revealed that BSA undergoes structural rearrangement to accommodate changes to the polymer's surface characteristics (i...
May 29, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38808997/beyond-the-tailpipe-an-outdated-flammability-standard-leads-to-organohalogen-flame-retardant-exposures-inside-cars
#6
JOURNAL ARTICLE
Linda S Birnbaum, Joseph M Fleming
No abstract text is available yet for this article.
May 29, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38808621/promotive-effects-of-chloride-and-sulfate-on-the-near-complete-destruction-of-perfluorocarboxylates-pfcas-in-brine-via-hydrogen-tuned-185-nm-uv-photolysis-mechanisms-and-kinetics
#7
JOURNAL ARTICLE
Sitao Liu, Gongde Chen, Qingyang Shi, Jay Gan, Bosen Jin, Yujie Men, Haizhou Liu
Hydrogen-tuned 185 nm vacuum ultraviolet (VUV/H2 ) photolysis is an emerging technology to destroy per- and polyfluoroalkyl substance (PFAS) in brine. This study discovered the promotive effects of two major brine anions, i.e., chloride and sulfate in VUV/H2 photolysis on the hydrated electron (eaq - ) generation and perfluorocarboxylates (PFCAs) destruction and established a kinetics model to elucidate the promotive effects on the steady-state concentration of eaq - ([eaq - ]ss ). Results showed that VUV/H2 achieved near-complete defluorination of perfluorooctanoic acid (PFOA) in the presence of up to 1000 mM chloride or sulfate at pH 12...
May 29, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38808456/significantly-enhanced-nitrate-and-phosphorus-removal-by-pyrite-sawdust-composite-driven-mixotrophic-denitrification-with-boosted-electron-transfer-comprehensive-evaluation-of-water-gas-biofilm-phases-during-a-long-term-study
#8
JOURNAL ARTICLE
Qi Zhou, Lixia Jia, Yuanwei Li, Weizhong Wu, Jianlong Wang
Further reducing total nitrogen (TN) and total phosphorus (TP) in the secondary effluent needs to be realized effectively and in an eco-friendly manner. Herein, four pyrite/sawdust composite-based biofilters were established to treat simulated secondary effluent for 304 days. The results demonstrated that effluent TN and TP concentrations from biofilters under the optimal hydraulic retention time (HRT) of 3.5 h were stable at <2.0 and 0.1 mg/L, respectively, and no significant differences were observed between inoculated sludge sources...
May 29, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38807562/sequestration-of-labile-organic-matter-by-secondary-fe-minerals-from-chemodenitrification-insight-into-mineral-protection-mechanisms
#9
JOURNAL ARTICLE
Shiwen Hu, Lirong Zheng, Hanyue Zhang, Yang Yang, Guojun Chen, Hanbing Meng, Kuan Cheng, Chao Guo, Ying Wang, Xiaomin Li, Tongxu Liu
Labile organic matter (OM) immobilized by secondary iron (Fe) minerals from chemodenitrification may be an effective way to immobilize organic carbon (OC). However, the underlying mechanisms of coupled chemodenitrification and OC sequestration are poorly understood. Here, OM immobilization by secondary Fe minerals from chemodenitrification was investigated at different C/Fe ratios. Kinetics of Fe(II) oxidation and nitrite reduction rates decreased with increasing C/Fe ratios. Despite efficient sequestration, the immobilization efficiency of OM by secondary minerals varied with the C/Fe ratios...
May 29, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38806168/effects-of-coexposure-to-air-pollution-from-vegetation-fires-and-extreme-heat-on-mortality-in-upper-northern-thailand
#10
JOURNAL ARTICLE
Athicha Uttajug, Xerxes Seposo, Arthit Phosri, Vera Ling Hui Phung, Muhammad Abdul Basit Ahmad Tajudin, Kayo Ueda
Background: understanding the effects of coexposure to compound extreme events, such as air pollution and extreme heat, is important for reducing current and future health burdens. This study investigated the independent and synergistic effects of exposure to air pollution from vegetation fires and extreme heat on all-cause mortality in Upper Northern Thailand. Methods: we used a time-stratified case-crossover study design with a conditional quasi-Poisson model to examine the association between mortality and coexposure to air pollution due to vegetation fire events (fire-PM2...
May 28, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38805726/high-resolution-mass-spectrometry-combined-with-reactive-oxygen-species-reveals-differences-in-photoreactivity-of-dissolved-organic-matter-from-microplastic-sources-in-aqueous-environments
#11
JOURNAL ARTICLE
Hao Chen, Xiaoling Shan, Xinran Qiu, Ling Ding, Xujun Liang, Xuetao Guo
Microplastics (MPs)-derived dissolved organic matter (MPs-DOM) is becoming a non-negligible source of DOM pools in aquatic systems, but there is limited understanding about the photoreactivity of different MPs-DOM. Herein, MPs-DOM from polystyrene (PS), polyethylene terephthalate (PET), poly(butylene adipate- co -terephthalate) (PBAT), PE, and polypropylene (PP), representing aromatic, biodegradable, and aliphatic plastics, were prepared to examine their photoreactivity. Spectral and high-resolution mass spectrometry analyses revealed that PS/PET/PBAT-DOM contained more unsaturated aromatic components, whereas PE/PP-DOM was richer in saturated aliphatic components...
May 28, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38805641/nontarget-discovery-of-per-and-polyfluoroalkyl-sulfonyl-halides-in-soils-by-integration-of-derivatization-and-specific-fragment-based-liquid-chromatography-high-resolution-mass-spectrometry-screening
#12
JOURNAL ARTICLE
Kun Wang, Xin Xiao, Zhengzheng Liu, Jing Wang, Xiangyu Zhu, Enhui Wu, Christopher P Higgins, Baoliang Chen
Though long recognized as synthetic precursors to other poly- and perfluoroalkyl substances (PFASs), most poly- and perfluoroalkyl sulfonyl halides (PASXs) cannot be directly measured and have generally received minimal attention. Inspired by the redox reaction between sulfonyl halide groups and p -toluenethiol in organic chemistry, we developed a novel nontarget analysis strategy for PASXs by intergrating derivatization and specific fragment-based liquid chromatography-high resolution mass spectrometry screening for m / z 82...
May 28, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38805386/effect-of-land-use-change-on-molecular-composition-and-concentration-of-organic-matter-in-an-oxisol
#13
JOURNAL ARTICLE
Zongtang Yang, Tsutomu Ohno, Balwant Singh
Land use change from native vegetation to cropping can significantly affect the quantity and quality of soil organic matter (SOM). However, it remains unclear how the chemical composition of SOM is affected by such changes. This study employed a sequential chemical extraction to partition SOM from an Oxisol into several distinct fractions: water-soluble fractions (ultrapure water (W)), organometal complexes (sodium pyrophosphate (PP)), short-range ordered (SRO) oxides (hydroxylamine-HCl (HH)), and well-crystalline oxides (dithionite-HCl (DH))...
May 28, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38805367/efficient-and-durable-oxidation-removal-of-formaldehyde-over-layered-double-hydroxide-catalysts-at-room-temperature
#14
JOURNAL ARTICLE
Lvcun Chen, Kanglu Li, Ting Xue, Yan Yang, Zhengjun Gong, Fan Dong
Room temperature catalytic oxidation (RTCO) using non-noble metals has emerged as a highly promising technique for removal of formaldehyde (HCHO) under ambient conditions; however, non-noble catalysts still face the challenges related to poor water resistance and low stability under harsh conditions. In this study, we synthesized a series of layered double hydroxides (LDHs) incorporating various dual metals (MgAl, ZnAl, NiAl, NiFe, and NiTi) for formaldehyde oxidation at ambient temperature. Among the synthesized catalysts, the NiTi-LDH catalyst showed an HCHO removal efficiency and CO2 yield close to 100...
May 28, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38804966/species-difference-bovine-trout-and-human-plasma-protein-binding-of-per-and-polyfluoroalkyl-substances
#15
JOURNAL ARTICLE
Weiping Qin, Beate I Escher, Julia Huchthausen, Qiuguo Fu, Luise Henneberger
Per- and polyfluoroalkyl substances (PFAS) strongly bind to proteins and lipids in blood, which govern their accumulation and distribution in organisms. Understanding the plasma binding mechanism and species differences will facilitate the quantitative in vitro -to- in vivo extrapolation and improve risk assessment of PFAS. We studied the binding mechanism of 16 PFAS to bovine serum albumin (BSA), trout, and human plasma using solid-phase microextraction. Binding of anionic PFAS to BSA and human plasma was found to be highly concentration-dependent, while trout plasma binding was linear for the majority of the tested PFAS...
May 28, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38804838/correction-to-probing-the-thermodynamics-of-biomagnification-in-zoo-housed-polar-bears-by-equilibrium-sampling-of-dietary-and-fecal-samples
#16
Yuhao Chen, Ying Duan Lei, Jaap Wensvoort, Sarra Gourlie, Frank Wania
No abstract text is available yet for this article.
May 28, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38804824/relaxation-of-spring-festival-firework-regulations-leads-to-a-deterioration-in-air-quality
#17
JOURNAL ARTICLE
Xiaojuan Huang, Yanzhen Ge, Tongsuo Yang, Zhe Song, Shaocai Yu, Qing Li, Xiaofei Wang, Yan Wang, Xinfeng Wang, Jixin Su, Likun Xue, Abdewahid Mellouki, Jianmin Chen
The relaxation of restrictions on Chinese Spring Festival (SF) firework displays in certain regions has raised concerns due to intensive emissions exacerbating air quality deterioration. To evaluate the impacts of fireworks on air quality, a comparative investigation was conducted in a city between 2022 (restricted fireworks) and 2023 SF (unrestricted), utilizing high time-resolution field observations of particle chemical components and air quality model simulations. We observed two severe PM2.5 pollution episodes primarily triggered by firework emissions and exacerbated by static meteorology (contributing approximately 30%) during 2023 SF, contrasting with its absence in 2022...
May 28, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38803193/modulating-the-microstructure-and-surface-acidity-of-mno-2-by-doping-induced-phase-transition-for-simultaneous-removal-of-toluene-and-no-x-at-low-temperature
#18
JOURNAL ARTICLE
Beilong Lin, Ziyang Guo, Jiali Tang, Peirong Chen, Daiqi Ye, Yun Hu
It is a great challenge to remove VOCs and NO x simultaneously from flue gas in nonelectric industries. This study focuses on the construction of Fe-MnO2 catalysts that perform well in the simultaneous removal of toluene and NO x at low temperatures. Utilizing the Fe-induced phase transition of MnO2 , Fe-MnO2 -F&R catalysts with a composite morphology of nanoflowers and nanorods were successfully prepared that provided an abundant microporous structure to facilitate the diffusion of molecules of different sizes...
May 27, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38803057/differentiating-microplastics-from-natural-particles-in-aqueous-suspensions-using-flow-cytometry-with-machine-learning
#19
JOURNAL ARTICLE
Xinjie Wang, Yang Li, Alexandra Kroll, Denise M Mitrano
Microplastics (MPs) in natural waters are heterogeneously mixed with other natural particles including algal cells and suspended sediments. An easy-to-use and rapid method for directly measuring and distinguishing MPs from other naturally present colloids in the environment would expedite analytical workflows. Here, we established a database of MP scattering and fluorescence properties, either alone or in mixtures with natural particles, by stain-free flow cytometry. The resulting high-dimensional data were analyzed using machine learning approaches, either unsupervised (e...
May 27, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38802328/distinct-assembly-patterns-of-soil-antibiotic-resistome-revealed-by-land-use-changes-over-30-years
#20
JOURNAL ARTICLE
Yuhao Fu, Fang Hu, Fang Wang, Min Xu, Zhongjun Jia, Wulf Amelung, Zhi Mei, Xiaozeng Han, Marko Virta, Xin Jiang, James M Tiedje
Compared with the ever-growing information about the anthropogenic discharge of nutrients, metals, and antibiotics on the disturbance of antibiotic resistance genes (ARGs), less is known about how the potential natural stressors drive the evolutionary processes of antibiotic resistance. This study examined how soil resistomes evolved and differentiated over 30 years in various land use settings with spatiotemporal homogeneity and minimal human impact. We found that the contents of soil organic carbon, nitrogen, soil microbial biomass, and bioavailable heavy metals, as well as related changes in the antibiotic resistome prevalence including diversity and abundance, declined in the order of grassland > cropland > bareland...
May 27, 2024: Environmental Science & Technology
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