Journal of hazardous materials letters最新文献_第10页

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>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−1) and in ponded water on their surface (up to 100 μg L−1), 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.</div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100050"},"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>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 Humicola insolens and actinobacterium Thermobifida fusca 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.</div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100063"},"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>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 Hydrilla verticillata 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 H. verticillata. Activities of SOD, CAT, and GPOD were constantly raised at lower concentrations and then decreased with increasing concentration and exposure duration of Rhodamine B. In vivo chlorophyll fluorescence experiments were used to examine its inhibitory effects on H. verticillata 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, PIabs. When exposed to Rhodamine B, electron transport is slowed down on both the acceptor and donor sides and overall decreases the photosynthetic performance of H. verticillata.</div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100069"},"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

Ingested microplastics: Do humans eat one credit card per week? 摄入的微塑料:人类每周吃掉一张信用卡吗?

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100071

Martin Pletz

{"title":"Ingested microplastics: Do humans eat one credit card per week?","authors":"Martin Pletz","doi":"10.1016/j.hazl.2022.100071","DOIUrl":"10.1016/j.hazl.2022.100071","url":null,"abstract":"<div>Ingested Microplastic (MP) particles can harm the human body. Estimations of the total mass of ingested MP particles correspond to 50 plastic bags per year (Bai et al., 2022), one credit card per week (Gruber et al., 2022), or a median value of 4.1 μg/week for adults (Mohamed Nor et al., 2021). The first two estimations are based on an analysis (Senathirajah et al., 2021) that predicts a total ingested mass of MP particles mi,MP of 0.1–5 g/week. This work revisits and evaluates this calculation and compares its results and methods to Mohamed Nor et al. (2021). Senathirajah combines data of averaged MP particle masses <math><msub><mrow><mover><mrow><mi>m</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow><mrow><mi>MP</mi></mrow></msub></math> from papers that reported MP particle sizes and MP particle counts nMP in shellfish, salt, beer, and water based on other papers that detected MP particles. Combined with the estimated weekly consumption of those consumables, they compute mi,MP. This work raises some serious issues of Senathirajah in the way they combine data and they obtained particle sizes. It concludes that Senathirajah overestimates mi,MP by several orders of magnitude and that mi,MP can be considered as a rather irrelevant factor for the toxic effects of MP particles on the human body.</div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100071"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000247/pdfft?md5=02aeea1849e1b8ce78b878fe49cb035a&pid=1-s2.0-S2666911022000247-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48168939","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

Bioaccumulation of lead (Pb) and its effects in plants: A review 铅在植物体内的生物积累及其影响研究进展

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100064

Samuel Collin , Amritha Baskar , Deepthi Mariam Geevarghese , Mohamed Niyaz Vellala Syed Ali , Praveena Bahubali , Rajan Choudhary , Vladislav Lvov , Gabriel Ibrahin Tovar , Fedor Senatov , Sivasankar Koppala , Sasikumar Swamiappan

{"title":"Bioaccumulation of lead (Pb) and its effects in plants: A review","authors":"Samuel Collin , Amritha Baskar , Deepthi Mariam Geevarghese , Mohamed Niyaz Vellala Syed Ali , Praveena Bahubali , Rajan Choudhary , Vladislav Lvov , Gabriel Ibrahin Tovar , Fedor Senatov , Sivasankar Koppala , Sasikumar Swamiappan","doi":"10.1016/j.hazl.2022.100064","DOIUrl":"10.1016/j.hazl.2022.100064","url":null,"abstract":"<div>Heavy metals (HM) toxicity is becoming a major threat to living organisms in recent years due to the increase in population and anthropogenic activities. Lead (Pb) shares about 10% of total pollution produced by heavy metals. The uptake of lead by the primary producers (plants) is found to affect their metabolic functions, growth, and photosynthetic activity. The accumulation of lead in excess can cause up to a 42% reduction in the growth of the roots. The current review addresses the global status of lead contamination in soil, potential lead sources, and the mechanism of lead uptake by the plants. This article also provides information about the lead concentration in plants in polluted and non-polluted areas. Humans are directly or indirectly dependent on plants to meet their daily requirements. So, it becomes necessary to review the problems associated with lead pollution in plants and its mode of action affecting the plant system. Factors like bioaccumulation, bioavailability, bioconcentration, transfer factor, and the role of Casparian strips as a natural physical barrier are discussed. Further, the updated literature survey about the various bioremediation strategies utilized for its elimination is also presented. The current study suggests that more attention needs to be focused on evaluating the effectiveness of bioremediation methods.</div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100064"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266691102200017X/pdfft?md5=a1d93fc87b451d9eb86c5231562d3b5a&pid=1-s2.0-S266691102200017X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44839286","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: 41

Natural nanoparticles of the critical element tellurium 关键元素碲的天然纳米粒子

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100053

Owen P. Missen , Ella R. Lausberg , Joël Brugger , Barbara Etschmann , Stuart J. Mills , Koichi Momma , Rahul Ram , Mihoko Maruyama , Xi-Ya Fang , Erik Melchiorre , Christopher G. Ryan , Edgar E. Villalobos-Portillo , Hiram Castillo-Michel , Kiyofumi Nitta , Oki Sekizawa , Jeremiah Shuster , Santonu K. Sanyal , Andrew Frierdich , Steve Hunt , Yuka Tsuri , Maria A.D. Rea

{"title":"Natural nanoparticles of the critical element tellurium","authors":"Owen P. Missen , Ella R. Lausberg , Joël Brugger , Barbara Etschmann , Stuart J. Mills , Koichi Momma , Rahul Ram , Mihoko Maruyama , Xi-Ya Fang , Erik Melchiorre , Christopher G. Ryan , Edgar E. Villalobos-Portillo , Hiram Castillo-Michel , Kiyofumi Nitta , Oki Sekizawa , Jeremiah Shuster , Santonu K. Sanyal , Andrew Frierdich , Steve Hunt , Yuka Tsuri , Maria A.D. Rea","doi":"10.1016/j.hazl.2022.100053","DOIUrl":"10.1016/j.hazl.2022.100053","url":null,"abstract":"<div>Tellurium (Te) is a Critical Element that is toxic to microorganisms and humans alike, most notably in its soluble oxyanionic forms. To date, the biogeochemical behaviour of Te in Earth’s surface environment is largely unknown. Here, we report the discovery of elemental Te nanoparticles (Te NPs) in regolith samples using Single-Particle Inductively Coupled Plasma Mass Spectroscopy. Tellurium NPs were detected in both proximal and distal locations (bulk concentrations >4 ppm) relative to weathering Te ores. Synchrotron X-ray Fluorescence Mapping and X-ray Absorption Spectroscopy showed that bulk Te in the regolith is generally associated with Fe (oxyhydr)oxides and clay minerals, and mostly found in the oxidation states +IV and +VI. Although Te NPs account for less than 2 mol‰ of Te in our samples, their detection provides evidence for the active biogeochemical cycling of Te in surface environments. Te NPs are reactive and are likely to have formed in situ in distal samples, most likely via microbially-mediated reduction. Hence, the presence of Te NPs indicates the potential for release of toxic soluble forms of Te even in environments where most Te is “fixed” in forms such as Fe (oxyhydr)oxides that have low solubility and poor bioavailability.</div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100053"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000065/pdfft?md5=1f4507d892913376289e3bdf27601fdb&pid=1-s2.0-S2666911022000065-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47413663","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: 2

Corrigendum to “The distribution of persistent, mobile and toxic (PMT) pharmaceuticals and personal care products monitored across Chinese water resources” “中国水资源监测的持久性、流动性和毒性（PMT）药品和个人护理产品的分布”勘误表

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100049

Chen Huang , Biao Jin

引用次数: 0

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>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.</div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100052"},"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>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.</div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100061"},"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

Henry’s Law constants of 15 per- and polyfluoroalkyl substances determined by static headspace analysis 静态顶空分析测定十五氟烷基和多氟烷基物质的亨利定律常数

Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100070

Ibrahim Abusallout , Chase Holton , Junli Wang , David Hanigan

{"title":"Henry’s Law constants of 15 per- and polyfluoroalkyl substances determined by static headspace analysis","authors":"Ibrahim Abusallout , Chase Holton , Junli Wang , David Hanigan","doi":"10.1016/j.hazl.2022.100070","DOIUrl":"10.1016/j.hazl.2022.100070","url":null,"abstract":"<div>While it is thought that some per- and polyfluoroalkyl substances (PFAS) may volatilize from aqueous solutions, experimentally measured Henry’s Law constants (kH, synonymous with air : water partition coefficient) are scarce. This leads to a lack of understanding of the partitioning of PFAS and an inability to predict concentrations above contaminated groundwater (e.g., vapor intrusion). We measured kH for 27 PFAS via headspace analysis and manipulations of the gas to liquid phase ratio. Fifteen PFAS produced mass spectrometry signals suitable for kH measurements. At 25 °C the experimentally measured dimensionless kH were: 0.31 – 2.82 for four fluorotelomer alcohols (FTOHs), 0.09 – 0.18 for three fluorotelomer sulfonates (FTSs), 0.30 – 1.01 for three iodinated PFAS, 0.43 – 0.92 for two sulfonamides, 3.86 for 6:2 fluorotelomer olefin, 0.69 for 8:2 fluorotelomer carboxylic acid, and 0.32 for 8:2 fluorotelomer acrylate. Longer fluoroalkyl chain length resulted in increased kH for FTOHs and FTSs, the only two groups in which chain length was studied. Perfluorinated sulfonates and carboxylates were generally not volatile enough to be measured, even at pH as low as 1, although fluorotelomers of both functional groups were measurably volatile. Temperature effects were well described by the van’t Hoff equation. kH was not significantly different in various environmentally relevant matrices demonstrating the broad applicability of the produced constants.</div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100070"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000235/pdfft?md5=e679c985dbb9f8f7aa220cd8d3af8f24&pid=1-s2.0-S2666911022000235-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45671788","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