Environmental Science & Technology Letters Environ.最新文献_第9页

Mapping the Cellular Injury Landscape of Acute Ozone Exposure: A Plasma Cell-Free DNA Profiling Study in Humans 绘制急性臭氧暴露的细胞损伤景观：人类无浆细胞DNA分析研究

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: 2026-05-19 DOI: 10.1021/acs.estlett.5c01287

Hao Zhou, Jian Zhao, Tianzong Zhou, Yuliang Ma, Shuhan Liu, Zhengkang You, Luyun Zhang, Shuyun Jiang, Fengru Li, Shen Chen, Liping Chen, Qing Wang, Xiumei Xing, Wen Chen, Qing Li* and Daochuan Li*,

{"title":"Mapping the Cellular Injury Landscape of Acute Ozone Exposure: A Plasma Cell-Free DNA Profiling Study in Humans","authors":"Hao Zhou, Jian Zhao, Tianzong Zhou, Yuliang Ma, Shuhan Liu, Zhengkang You, Luyun Zhang, Shuyun Jiang, Fengru Li, Shen Chen, Liping Chen, Qing Wang, Xiumei Xing, Wen Chen, Qing Li* and Daochuan Li*, ","doi":"10.1021/acs.estlett.5c01287","DOIUrl":"https://doi.org/10.1021/acs.estlett.5c01287","url":null,"abstract":"Ozone pollution is a growing global health threat, yet current evidence lacks cellular-level resolution to pinpoint its systemic damage. This randomized controlled crossover trial introduces plasma cell-free DNA (cfDNA) as a novel, sensitive biosensor for ozone-induced injury. In 29 healthy adults, acute ozone exposure (282.2 ± 44 ppb) significantly altered cfDNA characteristics: it reduced the proportion of 150–165 bp fragments and increased cfDNA derived from megakaryocytes (21.35%), vascular endothelia (135.10%), and B/NK/T cells (174.69%), revealing these as key cellular targets. Epigenetic analysis revealed increased perplexity at transcription start sites, indicating enhanced entropy and potential transcriptional dysregulation. These cfDNA signatures correlated with systemic physiological changes, including elevated inflammatory markers (interleukin-6, tumor necrosis factor-alpha), oxidative stress (8-hydroxy-2′-deoxyguanosine), endothelial dysfunction (endothelin-1), and lung epithelial injury (Clara cell secretory protein 16). Our findings demonstrate that cfDNA profiling can dynamically reflect ozone-induced cellular damage in the vascular, hematopoietic, and immune systems, moving beyond organ-level assessments. This approach provides a powerful and noninvasive tool for monitoring early systemic effects of air pollution, with implications for understanding mechanistic pathways and developing targeted interventions.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 6","pages":"788–795"},"PeriodicalIF":8.8,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148195389","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

Tire and Road Wear Particles as Vectors of Hydrophobic Tire Additives: Quantifying Contributions to Chlorinated Paraffins in Urban Road Environments 轮胎和道路磨损颗粒作为疏水性轮胎添加剂的载体：对城市道路环境中氯化石蜡的量化贡献

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: 2026-05-12 DOI: 10.1021/acs.estlett.6c00316

Yingjia Chen, Xinyu Du*, Xiaojun Liu, Ge Yin, Bo Yuan* and Tian Lin,

{"title":"Tire and Road Wear Particles as Vectors of Hydrophobic Tire Additives: Quantifying Contributions to Chlorinated Paraffins in Urban Road Environments","authors":"Yingjia Chen, Xinyu Du*, Xiaojun Liu, Ge Yin, Bo Yuan* and Tian Lin, ","doi":"10.1021/acs.estlett.6c00316","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00316","url":null,"abstract":"A recently developed large-scale separation protocol enabled gram-scale isolation of tire and road wear particles (TRWPs) from road dust and roadside soils, providing sufficient material to evaluate their role as carriers of tire-derived chemical additives. An abundant class of hydrophobic tire additives, chlorinated paraffins (CPs), was detected in all samples, with concentrations ranging from 11 to 36 μg g–1 in road dust, 9.6–15 μg g–1 in roadside soils, and 110–290 μg g–1 in dust- and soil-derived TRWPs collected from multiple road environments in a megacity. CP homologue fingerprints in road dust were strongly correlated with those in corresponding TRWPs, suggesting a potential shared source. An exponential relationship between TRWP abundance and its contribution rates to CPs (R2 = 0.95, p < 0.01) showed that TRWP levels govern CP contributions in road dust. TRWPs contributed more than 45% of total CPs at nearly half of the dust sampling sites and 9.8–24.8% in roadside soils. From a broader environmental perspective, estimated contributions were >44% in TRWP-rich environments, 15–36% in urban road dust, and 5–10% in roadside soils. These results provide the first evidence of CPs in environmentally derived TRWPs and quantitatively demonstrate the dissemination of hydrophobic tire additives via TRWPs across urban road environments.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 6","pages":"825–831"},"PeriodicalIF":8.8,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148195482","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

Alpine Wetlands as an Overlooked Source of Dimethyl Sulfide (DMS) on the Tibetan Plateau 青藏高原高寒湿地被忽视的二甲基硫化物来源

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: 2026-03-31 DOI: 10.1021/acs.estlett.6c00135

Yujia Xie, Qiaozhi Zha, Tengyu Liu*, Haoyu Liu, Junchao Yin, Yuliang Liu, Jiaping Wang, Ximeng Qi, Caijun Zhu, Wei Nie, Xuguang Chi, Xin Huang and Aijun Ding,

{"title":"Alpine Wetlands as an Overlooked Source of Dimethyl Sulfide (DMS) on the Tibetan Plateau","authors":"Yujia Xie, Qiaozhi Zha, Tengyu Liu*, Haoyu Liu, Junchao Yin, Yuliang Liu, Jiaping Wang, Ximeng Qi, Caijun Zhu, Wei Nie, Xuguang Chi, Xin Huang and Aijun Ding, ","doi":"10.1021/acs.estlett.6c00135","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00135","url":null,"abstract":"Dimethyl sulfide (DMS) emitted from the ocean is the largest natural source of sulfur to the atmosphere. In the sulfur-limited, near-pristine terrestrial regions, the rapid oxidation of DMS and subsequent formation of sulfur species also play critical roles in sustaining the sulfur cycle. However, measurements and quantifications of terrestrial DMS sources remain limited and are absent in the Tibetan Plateau (TP). Here, we present the first in situ field measurements of DMS at the TP alpine wetlands (3429 m above sea level) using Vocus proton transfer reaction time-of-flight mass spectrometry (Vocus PTR-ToF-MS). We detected evident DMS mixing ratios (up to 48.1 pptv) with strong diurnal cycles, in concert with methane (CH4) and carbon dioxide (CO2) that originate from microbial source in anaerobic sediments. An annual wetland-DMS emission from 2.3 × 10–5 to 6.5 × 10–4 Tg S yr–1 is estimated based on our measurements, comparable to other globally significant terrestrial DMS sources. Thus, the extensive alpine wetlands across the TP represent a previously overlooked biogenic DMS source in the TP region, potentially crucial for understanding the global DMS budget in the near-pristine, preindustrial terrestrial environment.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 6","pages":"803–810"},"PeriodicalIF":8.8,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148195455","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

Planetary Health: Now, and for the Future 地球健康：现在和未来

IF 8.8 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-06-09 DOI: 10.1021/acs.estlett.6c00437

Bryan W. Brooks*, Paul T. Anastas, Miriam L. Diamond and Jana Klánová,

引用次数: 0

Tripartite Transformation of Silver Nanoparticles: Deciphering Dynamic Toxicity through Mass Cytometry and Machine Learning 银纳米颗粒的三方转化：通过细胞计数和机器学习解读动态毒性

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: 2026-05-19 DOI: 10.1021/acs.estlett.6c00287

Sitong Huo, Yanping Li, Chengbin Li, Zhiwei Wu, Yan Yang, Kejing Zhang, Neng Yan* and Jianbo Shi*,

{"title":"Tripartite Transformation of Silver Nanoparticles: Deciphering Dynamic Toxicity through Mass Cytometry and Machine Learning","authors":"Sitong Huo, Yanping Li, Chengbin Li, Zhiwei Wu, Yan Yang, Kejing Zhang, Neng Yan* and Jianbo Shi*, ","doi":"10.1021/acs.estlett.6c00287","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00287","url":null,"abstract":"Environmental risk assessment of silver nanoparticles (AgNPs) has largely relied on a static binary framework attributing toxicity to either AgNPs or released ions (Ag+), overlooking secondary AgNPs (Ag0NPs) regenerated via environmental reduction. Here, we develop an integrated framework combining AgNP tracers, mass cytometry, and machine learning to resolve the time-dependent interconversion among AgNPs, Ag+, and Ag0NPs and to deconvolute their toxic contributions in microalgae. A pronounced size-dependent kinetic divergence was observed: 50 nm AgNPs released Ag+ 1.5 times faster than 90 nm particles, causing stronger early ionic toxicity, but subsequently produced a higher fraction of Ag0NPs (36.8% vs 25.3% at 72 h). Toxicity shifted from Ag+-dominated effects at early exposure (51.5–82% at 36 h) to substantial contributions from particulate species under prolonged exposure (up to ∼40%). These results demonstrate that AgNP toxicity emerges from a dynamic tripartite transformation system, providing a mechanistic basis for improved environmental risk assessment of metastable nanomaterials.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 6","pages":"796–802"},"PeriodicalIF":8.8,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148195385","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

Changes in Urban–Nonurban Ozone Disparities across China during 2000–2024 2000-2024年中国城市与非城市臭氧差异变化

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: 2026-04-22 DOI: 10.1021/acs.estlett.6c00315

Linhao Guo, Xuemei Wang*, Alexander Baklanov, Lin Zhang, Chujun Chen, Xiao Zhao and Min Shao,

{"title":"Changes in Urban–Nonurban Ozone Disparities across China during 2000–2024","authors":"Linhao Guo, Xuemei Wang*, Alexander Baklanov, Lin Zhang, Chujun Chen, Xiao Zhao and Min Shao, ","doi":"10.1021/acs.estlett.6c00315","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00315","url":null,"abstract":"Surface ozone formation mechanisms differ between urban and nonurban areas because of distinct meteorological conditions and emission profiles, often leading to higher ozone concentrations in nonurban regions. Recent changes in climate and emissions have modified the ozone disparity between urban and nonurban areas in China; however, the temporal evolution of this difference remains debated, and its underlying causes are not yet fully understood. Here, using a high-spatiotemporal-resolution maximum daily 8-h average (MDA8) ozone data set for 2000–2024, we show that the ozone disparity in China first declined and then increased after 2013. Using machine learning approaches, including extreme gradient boosting (XGBoost) and Shapley additive explanations (SHAP), we identified the key factors influencing these changes across three major city clusters: Beijing-Tianjin-Hebei (BTH), Yangtze River Delta (YRD), and Pearl River Delta (PRD). From 2013 to 2019, reductions in anthropogenic nitrogen oxide emissions and fine particulate matter (PM2.5) concentrations were the primary contributors to the changing ozone disparity. Meteorological contribution to the variations in urban–nonurban ozone disparities increased after 2020. In the context of climate change, urban ozone mitigation in China faces escalating challenges, especially in the PRD, which is more susceptible to climatic shifts and exhibits more pronounced urban–nonurban ozone disparities.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 6","pages":"811–817"},"PeriodicalIF":8.8,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148195391","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

Occurrence of Ultrashort-Chain Per- and Polyfluoroalkyl Substances in the Coral Reef Ecosystem of the Beibu Gulf, South China Sea 南海北部湾珊瑚礁生态系统中超短链全氟和多氟烷基物质的赋存

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: 2026-05-15 DOI: 10.1021/acs.estlett.6c00336

Fengli Zhou, Yan Wang, Jia Yang, Xiaodong Wang, Lijia Xu, Mehvish Mumtaz, Hui Chen*, Xiaotu Liu* and Da Chen,

{"title":"Occurrence of Ultrashort-Chain Per- and Polyfluoroalkyl Substances in the Coral Reef Ecosystem of the Beibu Gulf, South China Sea","authors":"Fengli Zhou, Yan Wang, Jia Yang, Xiaodong Wang, Lijia Xu, Mehvish Mumtaz, Hui Chen*, Xiaotu Liu* and Da Chen, ","doi":"10.1021/acs.estlett.6c00336","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00336","url":null,"abstract":"Ultrashort-chain per- and polyfluoroalkyl substances (USC-PFAS) have gained increasing attention due to their ubiquitous environmental presence and escalating environmental concerns. However, data on their presence in corals remain lacking. This study investigated the concentrations of USC-PFAS, including trifluoroacetic acid (TFA), perfluoropropionic acid (PFPrA), trifluoromethanesulfonate (TFMS), perfluoroethanesulfonate (PFEtS), perfluoropropanesulfonate (PFPrS), and bisperfluoromethane sulfonimide (bis-FMeSI), along with other legacy and emerging PFAS in reef-building coral samples (n = 54) from the Beibu Gulf of the South China Sea. Among the USC-PFAS, TFA, PFPrA, and bis-FMeSI exhibited detection rates of 100%, 74%, and 72%, respectively, in coral samples. TFA dominated the PFAS profile, accounting for 86% of the total concentrations by weight, with concentrations (median: 23 ng/g dw) far exceeding those of all other legacy and emerging PFAS. The wet-weight-based logarithm bioaccumulation factors (log10 BAFs) from seawater to coral were estimated to be 1.85–3.60 for TFA, 2.07–4.09 for PFPrA, and 0.56–3.43 for bis-FMeSI, suggesting their bioaccumulative potential in reef-building corals. This study provides the first evidence of the widespread occurrence of USC-PFAS, particularly TFA, in reef-building corals, underscoring the need for further research into their potential ecological risks.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 6","pages":"838–844"},"PeriodicalIF":8.8,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148195575","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

Unexpected Effects of Alcohol-Based Quenchers on Inhibiting Direct Photolysis of Organic Micropollutants in UV Processes 醇基猝灭剂抑制紫外工艺中有机微污染物直接光解的意外效果

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: 2026-05-07 DOI: 10.1021/acs.estlett.6c00424

Tabassum Billah, and , Jiale Xu*,

{"title":"Unexpected Effects of Alcohol-Based Quenchers on Inhibiting Direct Photolysis of Organic Micropollutants in UV Processes","authors":"Tabassum Billah,  and , Jiale Xu*, ","doi":"10.1021/acs.estlett.6c00424","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00424","url":null,"abstract":"Alcohol quenchers such as tert-butanol (TBA) are widely used for assessing the role of hydroxyl radicals in UV-based processes. One critical assumption is that alcohols have little effect on the direct photolysis of organic micropollutants (OMPs). However, this work demonstrated that TBA can inhibit direct photolysis of OMPs upon irradiation by UV. First, 5 mM TBA decreased the direct photolysis rate of OMPs at 222 and 254 nm for carbamazepine, caffeine, and diethyltoluamide, with a stronger inhibition of 47%–66% at 222 nm. TBA’s impact was minor for the other eight tested OMPs. Second, N2 purging and probe experiments suggested that the inhibition was not caused by dissolved oxygen or self-generation of •OH from OMPs. Third, model compounds with carbonyl groups showed strong inhibition by TBA at 222 and 254 nm. Further tests indicated that the inhibition was potentially related to interactions between alcohol and excited states of OMP. Overall, this work suggested that employing alcohols as quenchers for •OH may overestimate its role in OMP degradation in UV photolysis and UV/AOP processes. Fundamental mechanisms indeed warrant further exploration for the roles of different excited states, wavelength dependence, and structural influence.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 6","pages":"845–850"},"PeriodicalIF":8.8,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148195641","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

Urban Conflagrations: Structural Ash and Soil Metal(loid) Contamination after California’s Eaton and Palisades Fires 城市火灾：加州伊顿和帕利塞德火灾后的结构灰烬和土壤金属（loid）污染

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: 2026-05-12 DOI: 10.1021/acs.estlett.6c00268

S. Anselme Dossou, Leon Kelly, P. Louis Lu, Robin Jones, Oliver O’Donnell, Justin St. P. Walsh and Daniel D. Richter*,

{"title":"Urban Conflagrations: Structural Ash and Soil Metal(loid) Contamination after California’s Eaton and Palisades Fires","authors":"S. Anselme Dossou, Leon Kelly, P. Louis Lu, Robin Jones, Oliver O’Donnell, Justin St. P. Walsh and Daniel D. Richter*, ","doi":"10.1021/acs.estlett.6c00268","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00268","url":null,"abstract":"In the weeks after California’s Eaton-Palisades wildfires, structural ash of burned homes and soils from yards and curbsides were sampled for analysis of Pb, As, and eight metals from 32 burned residences. About six months after fires and after US Army Corps of Engineers’ Phase 2 cleanups removed 15 cm from structural ash footprints, 17 properties were resampled within about a meter of original sampling sites. Concentrations of metal(oid)s in structural ash and residential soils varied between and within properties with significant spatial and temporal patterns. Lead concentrations were highest in structural ash and soil of yards of select pre-1970s homes, the yard and curbside soils likely having Pb contaminants from before fires. Approximately 28% of structural-ash samples exceeded 200 ppm Pb, the residential soil screening level (SSL) of the US Environmental Protection Agency, and 50% exceeded 80 ppm, California’s Pb SSL. After cleanup, <5% of samples from within the scraped foundation areas exceeded 200 ppm Pb and 24% exceeded 80 ppm. Interpreting postcleanup risk from Pb and As depends greatly on the California or federal SSLs. Fires released metals from select older homes to residential soils in concentrations comparable to those found in unburned city soils.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 6","pages":"818–824"},"PeriodicalIF":8.8,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.estlett.6c00268","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148195481","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

A Mass-Produced Microplastic Antioxidant Degrades Rapidly under UV and Produces More Toxic Products via Nonphotolytic Processes 一种批量生产的微塑料抗氧化剂在紫外线下快速降解，并通过非光解过程产生更多的毒性产物

IF 8.8 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2026-05-12 Epub Date: 2026-04-22 DOI: 10.1021/acs.estlett.6c00224

Zhaozhao Li, , , Cédric G. Fichot, , , Richard Saint-Louis, , , Youssouf D. Soubaneh, , , Luc Tremblay, , , Xiaodong Zhang, , , Mathieu Babin, , , Zhe Lu*, , and , Huixiang Xie*,

{"title":"A Mass-Produced Microplastic Antioxidant Degrades Rapidly under UV and Produces More Toxic Products via Nonphotolytic Processes","authors":"Zhaozhao Li, , , Cédric G. Fichot, , , Richard Saint-Louis, , , Youssouf D. Soubaneh, , , Luc Tremblay, , , Xiaodong Zhang, , , Mathieu Babin, , , Zhe Lu*, , and , Huixiang Xie*, ","doi":"10.1021/acs.estlett.6c00224","DOIUrl":"https://doi.org/10.1021/acs.estlett.6c00224","url":null,"abstract":"Plastic additives are emerging contaminants in aquatic environments, making it critical to understand their persistence in plastics and surrounding waters. In this work, we conducted dual-phase monitoring of antioxidant additive octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (Irganox 1076, I-1076) in a system where low-density polyethylene (LDPE) microplastic films were suspended in pure water and exposed to ultraviolet (UV) radiation (295–365 nm). Over 240 days of exposure, I-1076 concentrations in the plastic phase decreased exponentially, with a half-life of 20.2 days, about 5 times shorter than in the dark control (99.2 days). In contrast, I-1076 concentrations in the aqueous phase remained low and nearly constant in both light and darkness, suggesting slow I-1076 leaching and/or transformation of I-1076 in the water outpacing leaching. Two degradation products were identified: 7,9-di-tert-butyl-1-oxaspiro[4,5]deca-6,9-diene-2,8-dione and 2,6-di-tert-butyl-1,4-benzoquinone. They both predominantly formed under dark conditions, suggesting nonphotochemical oxidative degradation as the primary pathway. Extrapolation to environmental UV conditions suggests that most I-1076 in waterborne LDPE microplastics is degraded before reaching the open ocean, limiting its ecological risks primarily to inland and coastal waters. However, the formation of secondary products may pose indirect toxicological risks. These results underscore the importance of quantifying plastic additives in both the plastic and aqueous phases to understand their fate and ecotoxicological impacts.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"13 5","pages":"760–766"},"PeriodicalIF":8.8,"publicationDate":"2026-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147864949","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