Environmental Science & Technology Letters Environ.最新文献_第8页

Electrochemical Hydrogen Looping to Enable Efficient Reverse Osmosis Concentrate Valorization via pH-Mediated Mineral Precipitation 电化学氢环通过ph介导的矿物沉淀实现有效的反渗透浓缩物增值

IF 7.3 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-07-14 Epub Date: 2026-06-11 DOI: 10.1021/acs.estlett.6c00331

Sheraz Bashir, and , Taeyoung Kim*,

{"title":"Electrochemical Hydrogen Looping to Enable Efficient Reverse Osmosis Concentrate Valorization via pH-Mediated Mineral Precipitation","authors":"Sheraz Bashir,  and , Taeyoung Kim*, ","doi":"10.1021/acs.estlett.6c00331","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00331","url":null,"abstract":"Electrochemical technologies enable a chemical-free, pH-induced precipitation of scaling ions present in reverse osmosis concentrate (ROC) or brine, thereby advancing both water and resource recovery. Here, we pioneer a proof-of-concept electrochemical hydrogen-looping process that significantly reduces the energy consumption required for precipitation without generating byproducts, thereby opening a new pathway for brine valorization. The key innovation involves the reuse of hydrogen produced by the hydrogen evolution reaction (HER) for the hydrogen oxidation reaction (HOR). The OH– generated via the HER (5 mA cm–2) enabled >70% hardness reduction using a simulated brackish water ROC sample. The required cell voltage (0.89 V) was 66% lower than that coupled with the conventional oxygen evolution reaction (2.64 V). This reduction was achieved by the thermodynamically/kinetically favored HOR, which also suppressed the undesired chlorine evolution reaction. The energy consumption for precipitation (0.45 kWh kg–1 as CaCO3) was reduced by approximately 90% relative to the previous study reporting the highest precipitation rate, while simultaneously achieving the highest productivity (2.43 kg CaCO3 h–1 m–2) reported to date. We also validated the process by recovering both CaCO3 and Mg(OH)2 from actual ROC samples, demonstrating its potential for brine mining. Overall, these findings establish electrochemical hydrogen looping as a promising strategy for brine valorization.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 7","pages":"1016–1022"},"PeriodicalIF":7.3,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148441672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Non-Negligible Source of Ultrafine Elemental Carbon: Agricultural Machinery─after Enhanced Fuel Quality and Emission Standards 超细单质碳的不可忽视的来源：农业机械──在提高燃料质量和排放标准之后

IF 7.3 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-07-14 Epub Date: 2026-06-02 DOI: 10.1021/acs.estlett.6c00455

Zeyu Liu, Xuehong Gong, Dongna Yan, Yongming Han*, Yu Peng, Yishun Zhang, Xinxin Feng, Junjie Cai, Yanli Feng and Yingjun Chen*,

{"title":"A Non-Negligible Source of Ultrafine Elemental Carbon: Agricultural Machinery─after Enhanced Fuel Quality and Emission Standards","authors":"Zeyu Liu, Xuehong Gong, Dongna Yan, Yongming Han*, Yu Peng, Yishun Zhang, Xinxin Feng, Junjie Cai, Yanli Feng and Yingjun Chen*, ","doi":"10.1021/acs.estlett.6c00455","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00455","url":null,"abstract":"Against China’s backdrop of substantial on-road vehicle emission reductions, nonroad sources─particularly agricultural machinery (AM)─have become significant contributors to elemental carbon (EC). The impact of rapidly updated fuels and emission standards on AM’s particle size-resolved EC and health effects remains unclear. This study measured EC size distributions from five AM units, further evaluating fuel types (petrodiesel B0 vs biodiesel B5/B20) and emission standards (Stage II vs Stage III) on emission characteristics and size distributions. The results show that (1) AM’s mean EC emission factor (EF) was 367.3 ± 476.5 mg/kg─exceeding typical on-road mobile sources─with char-EC and soot-EC comprising 7.3% and 92.7% of EFEC respectively. (2) Fuel type and emission standards exerted significant influence on EC emissions, particularly within the ultrafine particle fraction. Newer standards increased ultrafine EC emissions by 3.6-fold and using B20 elevated total EC by 24.3% versus using B0. (3) By incorporating deposition and clearance efficiency across different particle sizes, modeled respiratory deposition of EC yielded 237.9 mg/kg (children) and 163.9 mg/kg (adults). The pulmonary region constituted the primary deposition target site, then head airways, with the tracheobronchial receiving the least. This work provides essential data for evaluating AM emissions under new frameworks.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 7","pages":"909–915"},"PeriodicalIF":7.3,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148441839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Weekly Monitoring Reveals the Dynamics, Sources, and Loads of Pesticides, Pharmaceuticals, and Tire-Derived Chemicals in the Mississippi River 每周监测揭示了密西西比河中农药、药品和轮胎衍生化学品的动态、来源和负荷

IF 7.3 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-07-14 Epub Date: 2026-06-29 DOI: 10.1021/acs.estlett.6c00520

Zihang Wang, Andrew J. Erickson* and William A. Arnold*,

{"title":"Weekly Monitoring Reveals the Dynamics, Sources, and Loads of Pesticides, Pharmaceuticals, and Tire-Derived Chemicals in the Mississippi River","authors":"Zihang Wang, Andrew J. Erickson* and William A. Arnold*, ","doi":"10.1021/acs.estlett.6c00520","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00520","url":null,"abstract":"Understanding the sources and transport of contaminants in large rivers is often constrained by low-frequency monitoring that fails to resolve short-duration hydrologic effects. Weekly water samples were collected for one year from the Upper Mississippi River to quantify the occurrence, temporal dynamics, sources, and mass loadings of pesticides, a pharmaceutical, a corrosion inhibitor, and tire-derived chemicals. Distinct temporal patterns were observed. Tire-derived chemicals exhibited pronounced concentration peaks during spring snowmelt. Pesticide concentrations were highest in early summer following agricultural application. Pesticides showed strong positive correlations with river discharge (e.g., for metolachlor, ρ = 0.78 and p < 0.001), indicating inputs from increased runoff, while the wastewater indicator metformin had a negative correlation, consistent with dilution of point-source inputs. Cross-compound correlations indicated dominant contributions from urban runoff (tire-derived chemicals), agricultural runoff (pesticides), wastewater effluent (metformin), and mixed sources (benzotriazole). Load estimates showed tire-derived chemicals had mass loadings comparable to those of neonicotinoid insecticides. These results indicate that weekly sampling leads to improved characterization of contaminant sources and load contributions in large river systems.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 7","pages":"1001–1008"},"PeriodicalIF":7.3,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148441976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TFA Generation and Deposition over Europe May Currently See a Greater Influence from HFO-1234yf than HFC-134a 目前，HFO-1234yf对欧洲TFA生成和沉积的影响可能大于HFC-134a

IF 7.3 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-07-14 Epub Date: 2026-06-15 DOI: 10.1021/acs.estlett.6c00356

Rayne Holland*, Ben Adam, M Anwar H Khan, Dickon Young, Simon O’Doherty, Kieran M. Stanley, Matthew Rigby and Dudley E. Shallcross*,

{"title":"TFA Generation and Deposition over Europe May Currently See a Greater Influence from HFO-1234yf than HFC-134a","authors":"Rayne Holland*, Ben Adam, M Anwar H Khan, Dickon Young, Simon O’Doherty, Kieran M. Stanley, Matthew Rigby and Dudley E. Shallcross*, ","doi":"10.1021/acs.estlett.6c00356","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00356","url":null,"abstract":"Concerns around the prevalence of trifluoroacetic acid (TFA, CF3COOH) in the environment have been ongoing for more than 20 years. One source of TFA to the environment is via the atmospheric degradation of fluorinated gases (F-gases) to TFA and its subsequent deposition. During the past decade, controls on one major class of F-gases, hydrofluorocarbons (HFCs), have resulted in an increase in the production and use of hydrofluoroolefins (HFOs). Here, a tropospheric chemical transport model, STOCHEM-CRI, is used to compare the amount of TFA generated by the breakdown of an abundant HFC, HFC-134a (1,1,1,2-tetrafluoroethane, CF3CH2F), and its typical replacement, HFO-1234yf (2,3,3,3-tetrafluoropropene, CH2═CFCF3). Using derived global emission estimates for 2023, we predict that HFO-1234yf is already dominating atmospheric generation and deposition of TFA over Europe when compared with HFC-134a. This is despite the fact that the derived global emissions of HFC-134a are 22 times higher than those of HFO-1234yf. Globally, our simulations show that TFA production from HFO-1234yf is already equivalent to 26–75% of the TFA production from HFC-134a. As the transition away from HFCs progresses, it is likely that HFO-1234yf will continue to increase in its global contribution to TFA generation and resultant environmental contamination.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 7","pages":"938–945"},"PeriodicalIF":7.3,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.estlett.6c00356","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148441589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Large-Scale Episodic Ethylene Releases Observed from the West Ethylene Pipeline in Iran 伊朗西部乙烯管道观测到的大尺度幕式乙烯释放

IF 7.3 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-07-14 Epub Date: 2026-06-17 DOI: 10.1021/acs.estlett.6c00014

Hélène Massager*, Lieven Clarisse, Bruno Franco, Isabelle De Smedt, Adrien Vu Van, Cathy Clerbaux, Pierre Coheur and Sophie Bauduin,

{"title":"Large-Scale Episodic Ethylene Releases Observed from the West Ethylene Pipeline in Iran","authors":"Hélène Massager*, Lieven Clarisse, Bruno Franco, Isabelle De Smedt, Adrien Vu Van, Cathy Clerbaux, Pierre Coheur and Sophie Bauduin, ","doi":"10.1021/acs.estlett.6c00014","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00014","url":null,"abstract":"Atmospheric ethylene (C2H4) is an important tracer of anthropogenic emissions of volatile organic compounds (VOCs) and a precursor to tropospheric ozone. Here, we report on a series of large C2H4 plumes observed over western Iran using the satellite sounder IASI. Analyzing 18 years of bidaily observations, we identified a total of 12 intense but short emission episodes in the period 2016–2024. We show that these plumes exhibit no enhancements in any of the other VOCs that IASI is capable of detecting. Together with the location of the events, this suggests that the observed plumes originate from accidental or deliberate releases of nearly pure C2H4 from the West Ethylene Pipeline (WEP), which connects numerous petrochemical complexes in western Iran. To the best of our knowledge, these are the first reported satellite detections of C2H4 emissions from a petrochemical pipeline network. We estimate total plume C2H4 masses and find that most lie in the 1–3 kt range with the largest plume exceeding 12 kt. Using TROPOMI satellite observations, we also provide strong evidence of in-plume secondary formation of atmospheric formaldehyde (HCHO).","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 7","pages":"924–930"},"PeriodicalIF":7.3,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.estlett.6c00014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148441862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regulating Microbial-Driven Iron-Based Nanoparticles for Enhanced Pharmaceutical Contaminant Remediation 调控微生物驱动的铁基纳米颗粒增强药物污染物修复

IF 7.3 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-07-14 Epub Date: 2026-06-09 DOI: 10.1021/acs.estlett.5c01260

Qianyu Xu, and , Lan Ling*,

{"title":"Regulating Microbial-Driven Iron-Based Nanoparticles for Enhanced Pharmaceutical Contaminant Remediation","authors":"Qianyu Xu,  and , Lan Ling*, ","doi":"10.1021/acs.estlett.5c01260","DOIUrl":"https://doi.org/10.1021/acs.estlett.5c01260","url":null,"abstract":"The persistence of organic contaminants in aquatic environments poses serious threats to living organisms, while concentrations of highly toxic contaminants are often several orders of magnitude lower than those of coexisting interferents, and this presents a significant challenge to achieving available removal. Microbially synthesized iron-based nanoparticles (nFe) possess a characteristic biomass coating (nFe-OM) that may confer effective removal toward certain contaminants. However, the role of environmental factors in tuning the nFe-OM composition for contaminant removal remains underexplored. In this study, the modified nanoparticles feature distinct phases [nano zerovalent iron (Fe0), Fe2O3, FeOOH, and Fe3O4] and functional groups (−COOH, −OH, and −C═C). Four pharmaceutical contaminants─quinolyl (chloroquine phosphate, DIP), ribofuranyl (ribavirin, RIB), piperazinyl (rifampicin, RIF), and progesterone (dexamethasone, DEX)─are selected to evaluate selective removal mechanisms: RIB, DIP, and RIF exhibit a stronger affinity for carboxyl (−COOH) and hydroxyl (−OH) groups on nFe-OM synthesized by MR-1 (M-nFe-OM), while halogenated hydrocarbons (DIP/DEX) undergo additional reactions with conjugated π systems. In aquaculture wastewater experiments, the M-nFe-OM achieves a 197.5–215 mg/g removal capacity (960 mL/day) and retained its performance over 4–6 cycles. This work demonstrates a tunable microbial strategy for engineering multifunctional nFe-OM, offering a green and effective solution for pharmaceutical contaminant remediation.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 7","pages":"1009–1015"},"PeriodicalIF":7.3,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148441998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Isotope-Guided Atmospheric Chemistry toward High Dimension: Lexicon, Methods, and Molecular Insights from High-Resolution Mass Spectrometry─A Critical Review 面向高维的同位素引导大气化学：高分辨率质谱的词汇、方法和分子见解──综述

IF 7.3 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-07-14 Epub Date: 2026-06-12 DOI: 10.1021/acs.estlett.6c00174

Yunhua Chang*, Tianhao Ding and Yuanjian Yang,

{"title":"Isotope-Guided Atmospheric Chemistry toward High Dimension: Lexicon, Methods, and Molecular Insights from High-Resolution Mass Spectrometry─A Critical Review","authors":"Yunhua Chang*, Tianhao Ding and Yuanjian Yang, ","doi":"10.1021/acs.estlett.6c00174","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00174","url":null,"abstract":"Stable isotope analysis offers fundamental constraints on atmospheric pollution sources and chemical transformations. The field is at a critical crossroad, driven by the analytical revolution of high-resolution mass spectrometry (HRMS), notably Orbitrap platforms. These technologies enable molecular- and site-level isotopic analysis on pico- to nanomole sample quantities, generating data of unprecedented richness and complexity. This emerging analytical power, however, has created a secondary crisis: a lagging, ambiguous, and often misused scientific lexicon. This critical review argues that this lexical crisis is now a bottleneck to progress and provides a direct remedy. We first address this head on by establishing a precise, minimum-sufficient vocabulary with actionable rules. We then conduct a discriminating comparison of foundational terminologies, revealing how pervasive inconsistencies impede data synthesis, model development, and the very integrity of scientific discourse. A central focus is an in-depth assessment of the Orbitrap mass spectrometry platform, detailing its principles and transformative advantages, and illustrating its application through detailed case studies on atmospheric nitrate, sulfate, phosphate, and organic species. We conclude by identifying urgent, community-scale research needs and proposing a unified “Standard of Practice”, grounded in lexical discipline, to ensure the clarity, comparability, and epistemological soundness of future work in this exciting and fast-moving field.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 7","pages":"865–878"},"PeriodicalIF":7.3,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148441581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A 60-Year Sulfur Isotopic Record of Sulfate from a Southeastern Greenland Ice Core and Its Offset from Summit 格陵兰岛东南部冰芯60年硫酸盐的硫同位素记录及其峰顶偏移

IF 7.3 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-07-14 Epub Date: 2026-06-18 DOI: 10.1021/acs.estlett.6c00457

Zhongya Xu, Sakiko Ishino, Sachika Natori, Yoshinori Iizuka, Chihiro Miyamoto, Sumito Matoba, Ryu Uemura, Yoshio Takahashi and Shohei Hattori*,

{"title":"A 60-Year Sulfur Isotopic Record of Sulfate from a Southeastern Greenland Ice Core and Its Offset from Summit","authors":"Zhongya Xu, Sakiko Ishino, Sachika Natori, Yoshinori Iizuka, Chihiro Miyamoto, Sumito Matoba, Ryu Uemura, Yoshio Takahashi and Shohei Hattori*, ","doi":"10.1021/acs.estlett.6c00457","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00457","url":null,"abstract":"Sulfate aerosols play an important role in Earth’s radiation balance by scattering solar radiation and modifying cloud albedo. Ice cores provide long-term archives of atmospheric sulfur, enabling reconstruction of its sources and transformations through isotopic analysis. Here, we present a 60-year (1955–2015) record of sulfur isotopic composition (δ34S) and non-sea-salt sulfate (nssSO42–) flux from the SE-Dome ice core in southeastern Greenland. The δ34S-nssSO42– record shows low values (∼2‰) before 1970 and an increase to ∼5.5‰ around 2000, broadly consistent with changes in anthropogenic SO2 emissions. However, the post-2000 decrease in δ34S indicates additional influences beyond anthropogenic trends. Comparison with published δ34S records from the Summit ice core reveals a similar temporal evolution but a persistent ∼2‰ offset, with systematically higher values at Summit. We attribute this offset to differences in air-mass origin, snowfall seasonality, and volcanic influence between the two sites. Our results highlight the importance of spatial variability and site representativeness in interpreting ice core sulfur isotope records of Arctic sulfate aerosols.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 7","pages":"946–952"},"PeriodicalIF":7.3,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148441782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revealing Hidden Quinones through Diagnostic MS2 Fragmentation of Peptide–Quinone Adducts 通过诊断肽-醌加合物的MS2断裂揭示隐藏的醌

IF 7.3 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-07-14 Epub Date: 2026-06-10 DOI: 10.1021/acs.estlett.6c00417

Alyssa Radakovich, Anil Timilsina, Sudarshan Basyal, Ishtiaq A Jawad, Rene Boiteau, Allison Myers-Pigg and Yu Yang*,

{"title":"Revealing Hidden Quinones through Diagnostic MS2 Fragmentation of Peptide–Quinone Adducts","authors":"Alyssa Radakovich, Anil Timilsina, Sudarshan Basyal, Ishtiaq A Jawad, Rene Boiteau, Allison Myers-Pigg and Yu Yang*, ","doi":"10.1021/acs.estlett.6c00417","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00417","url":null,"abstract":"Quinones are redox-active components of natural organic matter that mediate electron transfer and influence biogeochemical processes, but many quinones in pyrogenic organic matter (PyOM) remain unresolved because they ionize poorly by mass spectrometry. Here, we present a peptide-tagging approach to improve detection of cysteine-reactive electrophiles in PyOM, with quinones expected to be a dominant subset based on reaction chemistry and selectivity experiments. A cysteine-containing peptide was used to form Michael-addition adducts, enhancing electrospray ionization and enabling untargeted screening by high-performance liquid chromatography-high-resolution tandem mass spectrometry. The method was benchmarked with five quinone standards and applied to extracts from charred plant material as a discovery-level screen for cysteine-reactive targets. We identified 98 quinone-candidate adducts (mean neutral mass ∼ 603 Da), of which more than 70% were not detectable in native MS1 data. Among formula-assigned features, hidden quinone candidates had median (O + N)/C of 0.391 and normalized oxidation state of carbon of −0.281, consistent with relatively low polarity and low oxidation state. These results reveal a previously inaccessible pool of hidden redox-active compounds in PyOM and provide a framework for prioritizing quinone-like electrophiles for confirmation and incorporation into models of fire-driven biogeochemical cycling.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 7","pages":"916–923"},"PeriodicalIF":7.3,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discovery of Emerging Fluorinated Organophosphorus Esters Emitted from Spent Lithium-Ion Battery Recycling 废旧锂离子电池回收中释放的新型氟化有机磷酯的发现

IF 8.8 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-06-09 Epub Date: 2026-05-11 DOI: 10.1021/acs.estlett.6c00335

Bibai Du, Shuaifeng Zhang, Xiang Ge, Jiexiong Ye, Jiali Ge, Tengxia He, Mingyang Xing and Lixi Zeng*,

{"title":"Discovery of Emerging Fluorinated Organophosphorus Esters Emitted from Spent Lithium-Ion Battery Recycling","authors":"Bibai Du, Shuaifeng Zhang, Xiang Ge, Jiexiong Ye, Jiali Ge, Tengxia He, Mingyang Xing and Lixi Zeng*, ","doi":"10.1021/acs.estlett.6c00335","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00335","url":null,"abstract":"The rapid growth of lithium-ion battery (LIB) recycling has raised concerns about the release of new fluorinated contaminants. Here we provide the first field evidence that spent LIB recycling is a source of emerging fluorinated organophosphorus esters (FOPEs) in the indoor environments of recycling facilities. Seven fluorinated organophosphonate, phosphite, and phosphate esters, commonly used as flame-retardant electrolyte additives, were targeted for analysis in indoor dust samples (n = 66) collected from an industrial-scale spent LIB recycling plant in China. Using a targeted UPLC-MS/MS method, all seven FOPEs were detected, with total concentrations ranging from 23.4 to 4780 ng/g (median, 738 ng/g; mean, 917 ng/g). Tris(2,2,2-trifluoroethyl) phosphite was the dominant congener, contributing 50.4% of the total FOPEs, followed by tris(1,1,1,3,3,3-hexafluoro-2-propyl) phosphite and bis(2,2,2-trifluoroethyl) (methoxycarbonylmethyl) phosphonate. Correlation analysis suggested shared LIB-related sources and possible phosphite-to-phosphate transformations during battery aging or recycling. Screening-level property predictions further indicated notable persistence, mobility, and bioaccumulation potentials for several highly fluorinated congeners. These findings point to an emerging class of fluorinated contaminants associated with battery circularity with potential implications for the surrounding environment.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 6","pages":"832–837"},"PeriodicalIF":8.8,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148195479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0