Environmental Science & Technology Letters Environ.最新文献_第2页

A Novel Mechanism of Lead–Tin Solder Spallation in the Presence of Nitrate

IF 8.9 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2025-02-09 DOI: 10.1021/acs.estlett.4c0114210.1021/acs.estlett.4c01142

Kathryn G. Lopez*, Chantaly Villalona, Haley Grubbs and Marc Edwards,

{"title":"A Novel Mechanism of Lead–Tin Solder Spallation in the Presence of Nitrate","authors":"Kathryn G. Lopez*, Chantaly Villalona, Haley Grubbs and Marc Edwards, ","doi":"10.1021/acs.estlett.4c0114210.1021/acs.estlett.4c01142","DOIUrl":"https://doi.org/10.1021/acs.estlett.4c01142https://doi.org/10.1021/acs.estlett.4c01142","url":null,"abstract":"Elevated 90th percentile water lead levels associated with the release of large chunks of lead–tin solder to drinking water were recently attributed to corrosion by nitrate. A new mechanism of water lead contamination via nitrate-induced spallation of solder was elucidated through surface analyses of new solder coupons and harvested pipe samples, bench-scale testing with lead–tin alloys of varying tin content, and electrochemical tests. Nitrate attack was associated with the formation of ammonia and other reduced nitrogen compounds, causing detinning of solder alloys with more than 40% tin by weight and eventually complete detachment of solder from the point of adhesion to copper pipe via the formation of a corrosive microenvironment. Solder spallation was observed in as little as 6 weeks and resulted in 1.3 times more metal weight loss than could be explained by Faraday’s law for both tin and 50/50 lead–tin solder in 32 h electrochemical tests. Understanding this mechanism of attack can help explain and predict water lead contamination events and inform the development of optimal corrosion control strategies for potable water supplies.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"12 3","pages":"334–340 334–340"},"PeriodicalIF":8.9,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.estlett.4c01142","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591027","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

Target and Suspect Screening Reveal PFAS Exceeding European Union Guideline in Various Water Sources South of Lyon, France

IF 8.9 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2025-02-07 DOI: 10.1021/acs.estlett.4c0112610.1021/acs.estlett.4c01126

Termeh Teymoorian, Louis Delon, Gabriel Munoz and Sébastien Sauvé*,

{"title":"Target and Suspect Screening Reveal PFAS Exceeding European Union Guideline in Various Water Sources South of Lyon, France","authors":"Termeh Teymoorian, Louis Delon, Gabriel Munoz and Sébastien Sauvé*, ","doi":"10.1021/acs.estlett.4c0112610.1021/acs.estlett.4c01126","DOIUrl":"https://doi.org/10.1021/acs.estlett.4c01126https://doi.org/10.1021/acs.estlett.4c01126","url":null,"abstract":"Lyon, a major hub for chemical industries in France, has been identified as a contamination hotspot of per- and polyfluoroalkyl substances (PFAS). Major chemical companies in the Pierre-Bénite area have used PFAS in the production of fluoropolymers and fluorotelomers, with effluents discharged into the Rhône River. This together with other contamination sources, such as firefighting foam use at a vicinal harbor oil depot, likely resulted in a complex PFAS signature. This study investigated PFAS contamination in various water sources in southern Lyon, including ponds, rivers, factory channels, wells, springs, and tap water. Out of 47 samples, 22 had a Σ77PFAS above 100 ng/L (maximum: ∼700 ng/L), and 67% of the tap water samples exceeded the European guideline of 100 ng/L for Σ20PFAS. Target PFAS profiles were dominated by perfluoroalkyl carboxylates (particularly C4 to C8), in agreement with their historical or current industrial usage. Suspect screening also revealed the occurrence of electrochemical fluorination precursors such as N-sulfopropyldimethylammoniopropyl perfluorohexanesulfonamido acetic acid (N-SPAmP-FHxSAA) and bistriflimide (used in the composition of ionic liquids). Certain fluorotelomers, including ESI+ (e.g., 6:2 fluorotelomer sulfonamidopropyl betaine (6:2 FTAB)) and ESI- (e.g., 6:2 FTS, 6:2 FTSAS-sulfone) compounds, were more prevalent in surface water than in tap or groundwater.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"12 3","pages":"327–333 327–333"},"PeriodicalIF":8.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.estlett.4c01126","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591025","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

Unveiling the Role of Processing Route in CO2 Mineralization by Incineration Bottom Ash under Near-Ambient Aqueous Conditions

IF 8.9 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2025-02-05 DOI: 10.1021/acs.estlett.4c0082710.1021/acs.estlett.4c00827

Xu Fan, and , Duo Zhang*,

{"title":"Unveiling the Role of Processing Route in CO2 Mineralization by Incineration Bottom Ash under Near-Ambient Aqueous Conditions","authors":"Xu Fan,  and , Duo Zhang*, ","doi":"10.1021/acs.estlett.4c0082710.1021/acs.estlett.4c00827","DOIUrl":"https://doi.org/10.1021/acs.estlett.4c00827https://doi.org/10.1021/acs.estlett.4c00827","url":null,"abstract":"Process design is crucial to scaling up ex situ mineral carbonation (MC) for CO2 storage and utilization. Here, we aim to elucidate the emission reduction potential and reaction product of different processing routes under near-ambient conditions. Utilizing municipal solid waste incineration ash (MSWIA) as a starting material, we examined the combined effects of semi-dry (SD) versus wet (W) and batch (BR) versus continuous flow regimes (CFR). We found that CFR-SD demonstrated the best promise in net emission reduction (∼0.047 kg CO2-eq for carbonating 1 kg MSWIA), attained by an accelerated CO2 uptake and low energy penalty. A carbonate-binding effect was observed under SD (but absent in W), raising the particle size by more than an order of magnitude. Although calcite was identified as the only CaCO3 polymorph, its microstructure varied significantly, with increasing crystal size (from 0.1 to 1 μm) and angularity when switching from SD to W. Introducing agitation to the system further promoted the dispersion of CaCO3, thereby increasing the amount of CO2 stored under CFR-SD. This study verifies the environmental advantages of CFR over BR and points to the synergies of MC with the production of carbonate-bond artificial aggregates through CFR-SD and cement additives through CFR-W for construction applications.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"12 3","pages":"341–347 341–347"},"PeriodicalIF":8.9,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591041","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

Exploring the Mysteries of Nitrogen-Transforming Microorganisms: Investigating the Potential Role of Aerobic Denitrification in Nitrogen Cycling in Reservoir Water Sources

IF 8.9 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2025-02-05 DOI: 10.1021/acs.estlett.4c0093610.1021/acs.estlett.4c00936

Na Li, Xuanzi Zhangsun, Shuhong Xue, Rong Li, Yuhang Su, Xiaoyan Liu, Honghong Guo*, Haihan Zhang and Tinglin Huang,

{"title":"Exploring the Mysteries of Nitrogen-Transforming Microorganisms: Investigating the Potential Role of Aerobic Denitrification in Nitrogen Cycling in Reservoir Water Sources","authors":"Na Li, Xuanzi Zhangsun, Shuhong Xue, Rong Li, Yuhang Su, Xiaoyan Liu, Honghong Guo*, Haihan Zhang and Tinglin Huang, ","doi":"10.1021/acs.estlett.4c0093610.1021/acs.estlett.4c00936","DOIUrl":"https://doi.org/10.1021/acs.estlett.4c00936https://doi.org/10.1021/acs.estlett.4c00936","url":null,"abstract":"Nitrogen management is essential for fostering environmental sustainability in source water reservoirs. A comprehensive analysis conducted in both southern and northern China revealed significant spatial and temporal variations in total nitrogen concentrations, particularly elevated during the thermal stratification period. Notably, Acinetobacter emerged as prevalent aerobic denitrifying bacteria, while Ralstonia, Permianibacter, Aeromonas, and Bradyrhizobium had multiple contributions to nitrogen metabolism beyond aerobic denitrification. The emergence of anaerobic zones limited the abundance of aerobic denitrifying bacteria. As the activity of these bacteria increased, nitrate concentrations decreased, demonstrating biological control of the denitrification process. During thermal stratification, an increase in the abundance of key genes (napAB, nirK, norBC) was associated with lower nitrogen concentrations, highlighting the critical role of the nap-type gene in facilitating aerobic denitrification in reservoirs. This study provides novel insights into the mechanisms by which microorganisms regulate water quality and mitigate nitrogen pollution, emphasizing the intricate relationship between microbial dynamics and environmental health in aquatic ecosystems.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"12 3","pages":"276–282 276–282"},"PeriodicalIF":8.9,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591042","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

Defluorination Mechanisms and Real-Time Dynamics of Per- and Polyfluoroalkyl Substances on Electrified Surfaces

IF 8.9 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2025-02-03 DOI: 10.1021/acs.estlett.4c0113010.1021/acs.estlett.4c01130

Kamal Sharkas, and , Bryan M. Wong*,

{"title":"Defluorination Mechanisms and Real-Time Dynamics of Per- and Polyfluoroalkyl Substances on Electrified Surfaces","authors":"Kamal Sharkas,  and , Bryan M. Wong*, ","doi":"10.1021/acs.estlett.4c0113010.1021/acs.estlett.4c01130","DOIUrl":"https://doi.org/10.1021/acs.estlett.4c01130https://doi.org/10.1021/acs.estlett.4c01130","url":null,"abstract":"Per- and polyfluoroalkyl substances (PFAS) are persistent environmental contaminants found in groundwater sources and a wide variety of consumer products. In recent years, electrochemical approaches for the degradation of these harmful contaminants have garnered a significant amount of attention due to their efficiency and chemical-free modular nature. However, these electrochemical processes occur in open, highly non-equilibrium systems, and a detailed understanding of PFAS degradation mechanisms in these promising technologies is still in its infancy. To shed mechanistic insight into these complex processes, we present the first constant-electrode potential (CEP) quantum calculations of PFAS degradation on electrified surfaces. These advanced CEP calculations provide new mechanistic details about the intricate electronic processes that occur during PFAS degradation in the presence of an electrochemical bias, which cannot be gleaned from conventional density functional theory calculations. We complement our CEP calculations with large-scale ab initio molecular dynamics simulations in the presence of an electrochemical bias to provide time scales for PFAS degradation on electrified surfaces. Taken together, our CEP-based quantum calculations provide critical reaction mechanisms for PFAS degradation in open electrochemical systems, which can be used to prescreen candidate material surfaces and optimal electrochemical conditions for remediating PFAS and other environmental contaminants.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"12 2","pages":"230–236 230–236"},"PeriodicalIF":8.9,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.estlett.4c01130","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376417","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

Driving Factors of PM2.5 Pollution Rebound in North China Plain in Early 2023

IF 8.9 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2025-02-03 DOI: 10.1021/acs.estlett.4c0115310.1021/acs.estlett.4c01153

Qian Song, Lyuyin Huang, Yanning Zhang, Zeqi Li, Shuxiao Wang*, Bin Zhao, Dejia Yin, Mingchen Ma, Shengyue Li, Bing Liu, Lili Zhu, Xing Chang, Da Gao, Yueqi Jiang, Zhaoxin Dong, Hongrong Shi and Jiming Hao,

{"title":"Driving Factors of PM2.5 Pollution Rebound in North China Plain in Early 2023","authors":"Qian Song, Lyuyin Huang, Yanning Zhang, Zeqi Li, Shuxiao Wang*, Bin Zhao, Dejia Yin, Mingchen Ma, Shengyue Li, Bing Liu, Lili Zhu, Xing Chang, Da Gao, Yueqi Jiang, Zhaoxin Dong, Hongrong Shi and Jiming Hao, ","doi":"10.1021/acs.estlett.4c0115310.1021/acs.estlett.4c01153","DOIUrl":"https://doi.org/10.1021/acs.estlett.4c01153https://doi.org/10.1021/acs.estlett.4c01153","url":null,"abstract":"An unexpected rebound in PM2.5 pollution was observed in the North China Plain (NCP) during the post-COVID-19 period in 2023 compared to 2022. Identifying the driving factors behind this phenomenon is critical for developing PM2.5 mitigation strategies. In this study, the Community Multiscale Air Quality (CMAQ) model, coupled with near-real-time emission inventories, was utilized to quantify the contributions of meteorological conditions and anthropogenic emissions to the severe PM2.5 rebound observed in February 2023. The results revealed that anthropogenic emissions and meteorological factors accounted for 59% and 41% of the rebound, respectively. Increased activities in transportation, domestic combustion, and power and industrial sectors significantly elevated NOX, SO2, and primary particulate emissions. Key meteorological drivers included higher relative humidity, reduced wind speed, and a lower atmospheric boundary layer height, which were linked to anomalous southerly wind patterns over the NCP. This study underscores the pivotal role of transitioning energy and industrial structures in fostering a green economic recovery, which is crucial for achieving sustained and substantial improvements in air quality over the NCP.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"12 3","pages":"305–312 305–312"},"PeriodicalIF":8.9,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591089","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

Defluorination Mechanisms and Real-Time Dynamics of Per- and Polyfluoroalkyl Substances on Electrified Surfaces.

IF 8.9 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2025-02-03 eCollection Date: 2025-02-11 DOI: 10.1021/acs.estlett.4c01130

Kamal Sharkas, Bryan M Wong

{"title":"Defluorination Mechanisms and Real-Time Dynamics of Per- and Polyfluoroalkyl Substances on Electrified Surfaces.","authors":"Kamal Sharkas, Bryan M Wong","doi":"10.1021/acs.estlett.4c01130","DOIUrl":"10.1021/acs.estlett.4c01130","url":null,"abstract":"Per- and polyfluoroalkyl substances (PFAS) are persistent environmental contaminants found in groundwater sources and a wide variety of consumer products. In recent years, electrochemical approaches for the degradation of these harmful contaminants have garnered a significant amount of attention due to their efficiency and chemical-free modular nature. However, these electrochemical processes occur in open, highly non-equilibrium systems, and a detailed understanding of PFAS degradation mechanisms in these promising technologies is still in its infancy. To shed mechanistic insight into these complex processes, we present the first constant-electrode potential (CEP) quantum calculations of PFAS degradation on electrified surfaces. These advanced CEP calculations provide new mechanistic details about the intricate electronic processes that occur during PFAS degradation in the presence of an electrochemical bias, which cannot be gleaned from conventional density functional theory calculations. We complement our CEP calculations with large-scale ab initio molecular dynamics simulations in the presence of an electrochemical bias to provide time scales for PFAS degradation on electrified surfaces. Taken together, our CEP-based quantum calculations provide critical reaction mechanisms for PFAS degradation in open electrochemical systems, which can be used to prescreen candidate material surfaces and optimal electrochemical conditions for remediating PFAS and other environmental contaminants.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"12 2","pages":"230-236"},"PeriodicalIF":8.9,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11823447/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431954","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

Flame-Free Candles Are Not Pollution-Free: Scented Wax Melts as a Significant Source of Atmospheric Nanoparticles.

IF 8.9 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2025-02-03 eCollection Date: 2025-02-11 DOI: 10.1021/acs.estlett.4c00986

Satya S Patra, Jinglin Jiang, Jianghui Liu, Gerhard Steiner, Nusrat Jung, Brandon E Boor

{"title":"Flame-Free Candles Are Not Pollution-Free: Scented Wax Melts as a Significant Source of Atmospheric Nanoparticles.","authors":"Satya S Patra, Jinglin Jiang, Jianghui Liu, Gerhard Steiner, Nusrat Jung, Brandon E Boor","doi":"10.1021/acs.estlett.4c00986","DOIUrl":"10.1021/acs.estlett.4c00986","url":null,"abstract":"Scented wax melts are being popularized as a safer, nontoxic alternative to traditional candles and incense for indoor aromatherapy. We performed field measurements in a residential test house to investigate atmospheric nanoparticle formation from scented wax melt use. We employed a high-resolution particle size magnifier-scanning mobility particle sizer (PSMPS) and a proton transfer reaction time-of-flight mass spectrometer (PTR-TOF-MS) for real-time monitoring of indoor atmospheric nanoparticle size distributions and terpene mixing ratios, respectively. Our findings reveal that terpenes released from scented wax melts react with indoor atmospheric ozone (O3) to initiate new particle formation (NPF) events, resulting in significant indoor atmospheric nanoparticle concentrations (>106 cm-3) comparable to those emitted by combustion-based scented candles, gas stoves, diesel engines, and natural gas engines. We show that scented wax melt-initiated NPF events can result in significant respiratory exposures, with nanoparticle respiratory tract deposited dose rates similar to those determined for combustion-based sources. Our results challenge the perception of scented wax melts as a safer alternative to combustion-based aromatherapy, highlighting the need for further research on the toxicological properties of the newly formed nanoparticles to better understand their environmental health implications.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"12 2","pages":"175-182"},"PeriodicalIF":8.9,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11823451/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431956","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

Flame-Free Candles Are Not Pollution-Free: Scented Wax Melts as a Significant Source of Atmospheric Nanoparticles

IF 8.9 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2025-02-03 DOI: 10.1021/acs.estlett.4c0098610.1021/acs.estlett.4c00986

Satya S. Patra, Jinglin Jiang, Jianghui Liu, Gerhard Steiner, Nusrat Jung* and Brandon E. Boor*,

{"title":"Flame-Free Candles Are Not Pollution-Free: Scented Wax Melts as a Significant Source of Atmospheric Nanoparticles","authors":"Satya S. Patra, Jinglin Jiang, Jianghui Liu, Gerhard Steiner, Nusrat Jung* and Brandon E. Boor*, ","doi":"10.1021/acs.estlett.4c0098610.1021/acs.estlett.4c00986","DOIUrl":"https://doi.org/10.1021/acs.estlett.4c00986https://doi.org/10.1021/acs.estlett.4c00986","url":null,"abstract":"Scented wax melts are being popularized as a safer, nontoxic alternative to traditional candles and incense for indoor aromatherapy. We performed field measurements in a residential test house to investigate atmospheric nanoparticle formation from scented wax melt use. We employed a high-resolution particle size magnifier-scanning mobility particle sizer (PSMPS) and a proton transfer reaction time-of-flight mass spectrometer (PTR-TOF-MS) for real-time monitoring of indoor atmospheric nanoparticle size distributions and terpene mixing ratios, respectively. Our findings reveal that terpenes released from scented wax melts react with indoor atmospheric ozone (O3) to initiate new particle formation (NPF) events, resulting in significant indoor atmospheric nanoparticle concentrations (>106 cm–3) comparable to those emitted by combustion-based scented candles, gas stoves, diesel engines, and natural gas engines. We show that scented wax melt-initiated NPF events can result in significant respiratory exposures, with nanoparticle respiratory tract deposited dose rates similar to those determined for combustion-based sources. Our results challenge the perception of scented wax melts as a safer alternative to combustion-based aromatherapy, highlighting the need for further research on the toxicological properties of the newly formed nanoparticles to better understand their environmental health implications.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"12 2","pages":"175–182 175–182"},"PeriodicalIF":8.9,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.estlett.4c00986","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375863","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

Detection of Measles Virus Genotype A in a Non-Endemic Wastewater Setting: Insights from Measles Wastewater and Environmental Monitoring in Canada’s Capital Region

IF 8.9 2区环境科学与生态学

Environmental Science & Technology Letters Environ. Pub Date : 2025-02-02 DOI: 10.1021/acs.estlett.4c0094510.1021/acs.estlett.4c00945

Emma Tomalty, Élisabeth Mercier, Lakshmi Pisharody, Tram Nguyen, Xin Tian, Md Pervez Kabir, Chandler Wong, Felix Addo, Nada Hegazy, Elizabeth Renouf, Dara Spatz Friedman, Shen Wan and Robert Delatolla*,

{"title":"Detection of Measles Virus Genotype A in a Non-Endemic Wastewater Setting: Insights from Measles Wastewater and Environmental Monitoring in Canada’s Capital Region","authors":"Emma Tomalty, Élisabeth Mercier, Lakshmi Pisharody, Tram Nguyen, Xin Tian, Md Pervez Kabir, Chandler Wong, Felix Addo, Nada Hegazy, Elizabeth Renouf, Dara Spatz Friedman, Shen Wan and Robert Delatolla*, ","doi":"10.1021/acs.estlett.4c0094510.1021/acs.estlett.4c00945","DOIUrl":"https://doi.org/10.1021/acs.estlett.4c00945https://doi.org/10.1021/acs.estlett.4c00945","url":null,"abstract":"The recent global resurgence of measles in 2023–2024, despite vaccine preventability, underscores a critical public health issue, largely due to reduced vaccination coverage during the SARS-CoV-2 pandemic. In response, Ottawa Public Health intensified vaccination efforts in 2023 and 2024. Additionally, a research initiative began in April 2024 to monitor Ottawa wastewater for measles virus (MeV) using established wastewater and environmental surveillance (WES) protocols. Unexpected positive MeV detections through RT-qPCR in Ottawa wastewater─despite no active regional cases─prompted genotypic and retrospective analyses of archived RNA samples dating back to 2020. The genotypic analysis identified positive detection to belong to genotype A, the progenitor strain of the viral vaccines, marking the first report of MeV vaccine RNA in a large catchment area. Linear regression analysis revealed detections aligned with intensified vaccination efforts by Ottawa Public Health. These findings emphasize the importance of integrating genotypic analysis into WES practices to mitigate possible confounding factors, such as vaccine shedding into wastewater. Additionally, this research highlights potential public health applications using MeV WES as a complementary tool. Implementing the findings of this study for MeV WES, and for other re-emerging viruses, could improve public health response and resource allocation.","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":"12 2","pages":"124–129 124–129"},"PeriodicalIF":8.9,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.estlett.4c00945","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376250","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