Journal of hazardous materials letters最新文献_第8页

Erratum to “Method for derivatization and isotopic analysis of the insensitive munition compound 3-nitro-1,2,4-triazol-5-one (NTO)” [J. Hazard. Mater. Lett. 2 (2021) 100044] “不敏感弹药化合物3-硝基-1,2,4-三唑-5-酮(NTO)的衍生化和同位素分析方法”的勘误[J]。风险。板牙。Lett. 2 (2021) 100044]

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100062

Chunlei Wang , Linnea J. Heraty , Haibo Li , Mark E. Fuller , Paul B. Hatzinger , Neil C. Sturchio

引用次数: 0

Water quality modelling framework for evaluating antibiotic resistance in aquatic environments 用于评估水生环境中抗生素耐药性的水质建模框架

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100056

Mahesh Jampani, Ritu Gothwal, Javier Mateo-Sagasta, Simon Langan

{"title":"Water quality modelling framework for evaluating antibiotic resistance in aquatic environments","authors":"Mahesh Jampani, Ritu Gothwal, Javier Mateo-Sagasta, Simon Langan","doi":"10.1016/j.hazl.2022.100056","DOIUrl":"10.1016/j.hazl.2022.100056","url":null,"abstract":"<div><p>In recent decades, antibiotic resistance (AR) has become a public health concern fuelled by increasing antibiotic consumption in many societies. Aquatic environments play a crucial role in AR development and spread where they receive antibiotics, antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) from a number of sources such as agriculture, aquaculture and wastewater treatment plants. Modelling is an increasingly important approach to understanding AR in aquatic environments and helps identify resistance patterns of emerging concern, evaluate fate and transport, and assess infection risks as well as look into their management in the future. However, current water quality models need to be improved to deal with the development and spread of AR. Prioritising the development of fate and transport models for AR could provide insights into bacterial evolution and help manage environmental pollution. This article provides a conceptual water quality modelling framework through a concise review of methods and approaches that can be used to model and evaluate AR in aquatic environments at the watershed scale. The key steps that need to build a framework include identifying sources and loadings, modelling the fate and transport of ARB and quantifying associated risks to humans and animals. Developing modelling scenarios and management strategies based on the framework could also contribute to achieving Sustainable Development Goals 3 (good health and well-being) and 6 (clean water and sanitation).</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000090/pdfft?md5=e212c2526459913c8690a64f3856fb06&pid=1-s2.0-S2666911022000090-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49307426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Assessing the impact of flooding on bacterial community structure and occurrence of potentially pathogenic bacteria in Texas Rivers after Hurricane Harvey 评估飓风哈维后洪水对德克萨斯州河流细菌群落结构和潜在致病菌发生的影响

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100058

Sina V. Moghadam , Kiran Kumar Vadde , Duc C. Phan , Arash Jafarzadeh, Vikram Kapoor

{"title":"Assessing the impact of flooding on bacterial community structure and occurrence of potentially pathogenic bacteria in Texas Rivers after Hurricane Harvey","authors":"Sina V. Moghadam , Kiran Kumar Vadde , Duc C. Phan , Arash Jafarzadeh, Vikram Kapoor","doi":"10.1016/j.hazl.2022.100058","DOIUrl":"https://doi.org/10.1016/j.hazl.2022.100058","url":null,"abstract":"<div><p>Hurricanes and extreme stormwater events can transport fecal contaminants and a wide range of bacterial pathogens to receiving rivers and streams, threatening public health. This study investigated the impact of flooding on bacterial diversity and the occurrence of fecal and potential bacterial pathogens in Texas Rivers over a short (3 weeks and 3 months) and long time (12 months) after Hurricane Harvey. Water samples were collected from 8 sampling sites of Guadalupe and San Antonio Rivers during three sampling events and bacterial community structure was evaluated using next-generation sequencing (NGS). Results showed that Proteobacteria, Actinobacteria, Bacteroidetes, and Cyanobacteria were the predominant phyla in the water samples. Hierarchal cluster analysis and principal coordinate analysis indicated that bacterial community structure was significantly different in the water samples collected from flooded and non-flooded sites. At genus level, eight fecal-associated and twelve potentially pathogenic bacterial genera were detected in water samples, mainly from flooded sites collected during short-term sampling events. Overall, results suggest that NGS-based microbial water quality monitoring of environmental samples after flooding events could provide critical information about the wide range of pathogens, which can be further assessed by specific methods to identify the risk of exposure.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000119/pdfft?md5=d88646c415ff7e1d97dd72d5557b3db4&pid=1-s2.0-S2666911022000119-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90001290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In vitro and in vivo roles of cyanobacterial carbonic anhydrase as a biomarker for monitoring antibiotics 体外和体内蓝藻碳酸酐酶作为监测抗生素的生物标志物的作用

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100055

Huiting Chen , Xiaoxi Wu , Ling Li , Mingyu Wang , Chao Song , Shuguang Wang , Zhen Yan

{"title":"In vitro and in vivo roles of cyanobacterial carbonic anhydrase as a biomarker for monitoring antibiotics","authors":"Huiting Chen , Xiaoxi Wu , Ling Li , Mingyu Wang , Chao Song , Shuguang Wang , Zhen Yan","doi":"10.1016/j.hazl.2022.100055","DOIUrl":"https://doi.org/10.1016/j.hazl.2022.100055","url":null,"abstract":"<div><p>Environmental biomarkers represent an emerging tool in environmental monitoring by measuring variations in cellular or molecular exposure to chemical pollutants. Carbonic anhydrase, a widespread enzyme in organisms, has the potential to be utilized as a biomarker because of its sensitive activity to chemical pollutants. Here, we report the first extracellular carbonic anhydrase (EcaA) from cyanobacteria as a biomarker for monitoring antibiotics. A recombinant microbial factory that is capable of heterologously overexpressing EcaA was constructed, and the purified enzyme exhibited superior performance in monitoring various antibiotics <em>in vitro</em>. The IC<sub>50</sub> values of the four selected antibiotics, ciprofloxacin, spectinomycin, tetracycline and ampicillin, were 1.45 ± 0.61, 10.40 ± 0.34, 18.92 ± 2.42 and 59.73 ± 2.56 μM, respectively. The feasibility of EcaA as a biomarker for monitoring antibiotics <em>in vivo</em> was also confirmed. Growth of wild-type cyanobacteria was more inhibited by ciprofloxacin and tetracycline than an EcaA-null mutant, demonstrating that EcaA responded physiologically to the two antibiotics, thus causing growth defects. Our results enable advanced development and optimization of carbonic anhydrase as a biomarker to monitor antibiotics <em>in vitro</em> and <em>in vivo</em>.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000089/pdfft?md5=8c830109c0128a3d0c7faee2e982bd8e&pid=1-s2.0-S2666911022000089-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137080959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adsorptive degradation of dimethyl methylphosphonate over Zr-based metal–organic framework built from 3,3′,5,5′-azobenzenetetracarboxylic acid 3,3′，5,5′-偶氮苯四羧酸锆基金属-有机骨架吸附降解甲基膦酸二甲酯

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100066

Sachin K. Chitale, Young Sang Ko, Jung Won Choi, Ji Woong Yoon, Donghui Jo, Su-Kyung Lee, Kyung Ho Cho, U-Hwang Lee

{"title":"Adsorptive degradation of dimethyl methylphosphonate over Zr-based metal–organic framework built from 3,3′,5,5′-azobenzenetetracarboxylic acid","authors":"Sachin K. Chitale, Young Sang Ko, Jung Won Choi, Ji Woong Yoon, Donghui Jo, Su-Kyung Lee, Kyung Ho Cho, U-Hwang Lee","doi":"10.1016/j.hazl.2022.100066","DOIUrl":"10.1016/j.hazl.2022.100066","url":null,"abstract":"<div><p>Chemical warfare agents (CWAs) pose a significant threat to humans because of their high toxicity. Zirconium-based metal–organic frameworks (Zr-MOFs) are promising candidates for the purification and detoxification of CWAs. In this study, we prepared a Zr<sub>6</sub>O<sub>4</sub>(OH)<sub>8</sub>(H<sub>2</sub>O)<sub>4</sub>(abtc)<sub>2</sub> denoted to Zr-abtc (abtc = 3,3′,5,5′-azobenzene-tetracarboxylate) under eco-friendly hydrothermal reflux conditions and investigated its detoxification performance. Dimethyl methylphosphonate (DMMP) was used as a simulant of a nerve agent to evaluate the adsorption performance of Zr–abtc. The Zr–abtc MOF was constructed from an 8-connected Zr<sub>6</sub> cluster [Zr<sub>6</sub>(µ<sub>3</sub>-O)<sub>4</sub>(µ<sub>3</sub>-OH)<sub>4</sub>] with abtc as a linker, resulting in the generation of abundant surface hydroxyl groups, high porosity, and remarkable structural robustness under high moisture and high temperature conditions. The results of the breakthrough (BT) test of DMMP under dry and humid conditions reveal that Zr–abtc displays high DMMP adsorption performance with the adsorption capacity of 1.74 and 1.60 mmol/g under dry and humid condition, respectively. The high performance of Zr–abtc can be attributed to not only the strong interaction between the surface hydroxyl group of Zr–abtc MOF and DMMP but also the catalytic activity of the surface hydroxyl group to form the decomposed product of DMMP, as demonstrated using Fourier transform infrared spectroscopy (FTIR).</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000193/pdfft?md5=1d25cc90feb75b186b4b6ac47ec39f3c&pid=1-s2.0-S2666911022000193-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49507099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Release of perfluoroalkyl substances from AFFF-impacted concrete in a firefighting training ground (FTG) under repeated rainfall simulations 反复降雨模拟下消防训练场(FTG)中受afff影响的混凝土中全氟烷基物质的释放

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100050

Phong K. Thai , Jeffrey T. McDonough , Trent A. Key , Jack Thompson , Pritesh Prasad , Scott Porman , Jochen F. Mueller

{"title":"Release of perfluoroalkyl substances from AFFF-impacted concrete in a firefighting training ground (FTG) under repeated rainfall simulations","authors":"Phong K. Thai , Jeffrey T. McDonough , Trent A. Key , Jack Thompson , Pritesh Prasad , Scott Porman , Jochen F. Mueller","doi":"10.1016/j.hazl.2022.100050","DOIUrl":"10.1016/j.hazl.2022.100050","url":null,"abstract":"<div><p>Historical use of per- and polyfluoroalkyl substances (PFAS) at firefighting training grounds (FTGs) has prompted questions regarding possible PFAS retention within concrete and subsequent releases to the environment. This investigation seeks to better understand the release of five PFAS from concrete cores collected from a legacy FTG. The vertical profile of cores were assessed, then surface ponding and rainfall simulations were conducted on the cores. Perfluorooctane sulfonate (PFOS) had the highest concentrations in both the core (up to 10,000 μg kg<sup>−1</sup>) and in ponded water on their surface (up to 100 μg L<sup>−1</sup>), followed by 6:2 fluorotelomer sulfonate (6:2 FTS) and perfluorohexane sulfonate (PFHxS). The maximum concentrations of PFAS in runoff water of five rainfall simulations were similar, suggesting recurring release of PFAS from AFFF impacted concrete, which could be sustained by upward transport of PFAS in the concrete subsurface layers through a potential “wicking” effect. The estimated mass of PFAS released during a simulated rainfall of 60 mm was approximately 1% of the total PFAS mass estimated within the top 1 cm of the concrete core. The results of the study suggest that concrete at FTGs may present an ongoing secondary source of PFAS in runoff water events.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266691102200003X/pdfft?md5=ee242ecd07384b5aeab3e79372d11073&pid=1-s2.0-S266691102200003X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46212828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Structural, functional, and molecular docking analyses of microbial cutinase enzymes against polyurethane monomers 微生物角质酶对聚氨酯单体的结构、功能和分子对接分析

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100063

Nicolás Flores-Castañón , Shrabana Sarkar , Aparna Banerjee

{"title":"Structural, functional, and molecular docking analyses of microbial cutinase enzymes against polyurethane monomers","authors":"Nicolás Flores-Castañón , Shrabana Sarkar , Aparna Banerjee","doi":"10.1016/j.hazl.2022.100063","DOIUrl":"10.1016/j.hazl.2022.100063","url":null,"abstract":"<div><p>Plastic waste is the biggest global problem in present times due to its constant bioaccumulation in the environment. During the last year, 367 Mt of plastics were produced in the world, of which 28.6 Mt correspond to polyurethane waste. Polyurethanes can be found in products such as adhesives, preservatives, and foams, and are often difficult to recycle. The fragmentation of plastic waste in the environment generates microplastics causing a long-term effect on our ecosystem. In search of its solution via bioremediation using enzymes, in our present study cutinase enzyme has been chosen, as it appears to be a novel candidate due to the wide variety of substrates it hydrolyzes and its presence in different microorganisms. According to physiochemical characteristics, it was found that microbial cutinase enzymes are majorly made up of aliphatic amino acids. A higher aliphatic index (more than 80) indicates the great thermostability of the enzyme. Moreover, the enzyme is found to be hydrophilic and structurally stable. The negative GRAVY value of the enzyme confirmed its stable interaction with water. It was also observed that all chosen protein models had an average of 91.10 % amino acids in the favorable regions of the Ramachandran plot. The studied microbial cutinase enzymes from both fungi <em>Humicola insolens</em> and actinobacterium <em>Thermobifida fusca</em> successfully coupled with the polyurethane resin monomers. The main interactions were found in the catalytic triad with bonds close to the urethane bonds of the ligand, in addition to having an average binding energy of − 6 kJ/mol. The interaction between the cutinases with the PUR resin as a ligand was found to be evident from our study with stable binding energies, which makes microbial cutinases potential enzymes for polyurethane waste bioremediation processes.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000168/pdfft?md5=69c6a697902e17f90c733fa912cceb51&pid=1-s2.0-S2666911022000168-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54420912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Toxic effects of Rhodamine B on antioxidant system and photosynthesis of Hydrilla verticillata 罗丹明B对水螅抗氧化系统及光合作用的毒性影响

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100069

Jyotshana Sharma, Shubhangani Sharma, Upma Bhatt, Vineet Soni

{"title":"Toxic effects of Rhodamine B on antioxidant system and photosynthesis of Hydrilla verticillata","authors":"Jyotshana Sharma, Shubhangani Sharma, Upma Bhatt, Vineet Soni","doi":"10.1016/j.hazl.2022.100069","DOIUrl":"10.1016/j.hazl.2022.100069","url":null,"abstract":"<div><p>Rhodamine B is a synthetic dye released in huge quantities as hazardous colored effluents into aquatic ecosystems. It negatively affects the metabolic and physiological processes in aquatic plants. The goal of current study was to assess the impact of various Rhodamine B concentrations (5, 10, 15, 20, and 25 mg/L) on antioxidant and photosynthetic performance of <em>Hydrilla verticillata</em> exposed for 24, 48, and 72 h. Results of present study clearly demonstrate that Rhodamine B inhibits the activity of the superoxide dismutase (SOD), catalase (CAT), and guaiacol peroxidase (GPOD) in <em>H. verticillata</em>. Activities of SOD, CAT, and GPOD were constantly raised at lower concentrations and then decreased with increasing concentration and exposure duration of Rhodamine B. <em>In vivo</em> chlorophyll fluorescence experiments were used to examine its inhibitory effects on <em>H. verticillata</em> photosystem II (PSII). The OJIP fluorescence induction kinetics were altered by increasing the Rhodamine B concentration and treatment time as a result increasing the parameters Fo/Fm and φDo while decreasing Fm, φPo, Ψo, φEo, RC/CSm, ABS/CSm, TR/CSm, ET/CSm and, PI<sub>abs</sub>. When exposed to Rhodamine B, electron transport is slowed down on both the acceptor and donor sides and overall decreases the photosynthetic performance of <em>H. verticillata</em>.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000223/pdfft?md5=e432bdd5bd88eec65fcc1b5c27259713&pid=1-s2.0-S2666911022000223-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45903996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Smartphone-enabled rapid quantification of microplastics 智能手机支持的微塑料快速定量

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100052

Jamie Leonard , Hatice Ceylan Koydemir , Vera S. Koutnik , Derek Tseng , Aydogan Ozcan , Sanjay K Mohanty

{"title":"Smartphone-enabled rapid quantification of microplastics","authors":"Jamie Leonard , Hatice Ceylan Koydemir , Vera S. Koutnik , Derek Tseng , Aydogan Ozcan , Sanjay K Mohanty","doi":"10.1016/j.hazl.2022.100052","DOIUrl":"10.1016/j.hazl.2022.100052","url":null,"abstract":"<div><p>Developing methods to quickly detect microplastics is critical to assessing the extent of microplastic contamination in the environment. However, current methods to quantify microplastics from environmental samples can take several hours to days and often require access to expensive specialized microscopy instruments. Herein we report a smartphone-based method to rapidly quantify microplastics. The method involves isolating microplastics from soil or water by density separation and vacuum filtration, staining the isolated plastic polymers with Nile Red, and quantifying the strained microplastics as small as 10 µm using a smartphone-based fluorescence microscope with an opti-mechanical attachment. The smartphone-enabled quantification using an algorithm eliminates time-consuming digestion steps and manual counting, thereby enabling quantification of microplastic concentration in environmental samples within 1 h. The method successfully detected a wide range of plastic polymers, but a dilution step was often needed if the samples contained high concentrations of particulates or non-plastic debris to minimize optical overlap or blocking. This method could serve as an initial assessment tool to rapidly quantify microplastics in environments in remote places with limited access to expensive resources and open the possibility to increase the frequency of monitoring microplastic concentration in engineered systems such as wastewater treatment plants.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000053/pdfft?md5=93fdb20c2459e2530808de497c75bb47&pid=1-s2.0-S2666911022000053-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45482545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Novel per- and polyfluoroalkyl substances in an active-use C6-based aqueous film forming foam 新型全氟烷基和多氟烷基物质在现役c6基水成膜泡沫中的应用

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100061

Marzieh Shojaei , Abigail S. Joyce , P. Lee Ferguson , Jennifer L. Guelfo

{"title":"Novel per- and polyfluoroalkyl substances in an active-use C6-based aqueous film forming foam","authors":"Marzieh Shojaei , Abigail S. Joyce , P. Lee Ferguson , Jennifer L. Guelfo","doi":"10.1016/j.hazl.2022.100061","DOIUrl":"10.1016/j.hazl.2022.100061","url":null,"abstract":"<div><p>Studies have identified hundreds of per- and polyfluoroalkyl substances (PFAS) in aqueous film forming foam (AFFF) using high resolution mass spectrometry (HRMS), and there is increasing reliance on HRMS with suspect screening in areas such as PFAS fate and transport. Characterization of active-use AFFF formulations is crucial for maintaining representative lists of PFAS for such efforts. Herein, targeted analysis, total oxidizable precursor assay (TOP), suspect screening, and non-targeted analysis were used to characterize PFAS in an AFFF currently certified for use by the U.S. military. The sum of PFAS identified during targeted analysis and suspect screening was compared to TOP, demonstrating that > 90% (20.2 mM) of the estimated total PFAS concentration (22.4 mM) was comprised of \"unknown\" PFAS. Tandem and multi-stage tandem mass spectra were used to annotate 10 PFAS within 9 classes, 8 of which have never been reported. A subset are fluorotelomer-based isomers of legacy, electrochemically synthesized PFAS. Thus, suspect screening efforts that rely solely on accurate mass matching may mis-annotate PFAS presented here as isomers that will have key differences in properties such as biotransformation pathways. The total estimated concentration of the 10 PFAS was ~20 mM, which agrees with the \"unknown\" fraction (20.2 mM) identified by TOP.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000144/pdfft?md5=5566103c3a8b5fc00faf2118849282c5&pid=1-s2.0-S2666911022000144-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46653913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9