{"title":"超短链 PFAS 三氟乙酸盐的 60 年增长及其作为地下水年龄示踪剂的适用性","authors":"Christian N. Albers*, and , Jürgen Sültenfuss, ","doi":"10.1021/acs.estlett.4c0052510.1021/acs.estlett.4c00525","DOIUrl":null,"url":null,"abstract":"<p >Trifluoracetate (TFA) is an extremely mobile and persistent ultra-short-chain per- and polyfluoroalkyl substance (PFAS), found ubiquitously in the environment. Oxidation of certain fluorinated gases in the atmosphere is considered the primary source of TFA in the terrestrial environment, and the combined change in gas type and increased usage would therefore expectedly lead to an increased TFA burden over the last few decades. Here, we show that the concentration of TFA in 113 Danish groundwater monitoring wells is strongly correlated to the groundwater recharge year, as derived from the tritium-helium dating method. TFA was not detected in tritium-free groundwater recharged before 1960, while it was detected at low concentrations in most samples recharged between 1960 and 1980. Groundwater recharged after 1980 had at least 0.1 μg/L TFA, and the concentration increased with time. Shallow groundwater from natural “background” areas revealed some variation of TFA even with diffuse atmospheric deposition as the only source, but additional local sources must contribute TFA to some of the monitoring wells. As an important side aspect, TFA may prove very useful as a simple indicator of groundwater age, such as the presence of young water in a groundwater abstraction well.</p>","PeriodicalId":37,"journal":{"name":"Environmental Science & Technology Letters Environ.","volume":null,"pages":null},"PeriodicalIF":8.9000,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A 60-Year Increase in the Ultrashort-Chain PFAS Trifluoroacetate and Its Suitability as a Tracer for Groundwater Age\",\"authors\":\"Christian N. Albers*, and , Jürgen Sültenfuss, \",\"doi\":\"10.1021/acs.estlett.4c0052510.1021/acs.estlett.4c00525\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Trifluoracetate (TFA) is an extremely mobile and persistent ultra-short-chain per- and polyfluoroalkyl substance (PFAS), found ubiquitously in the environment. Oxidation of certain fluorinated gases in the atmosphere is considered the primary source of TFA in the terrestrial environment, and the combined change in gas type and increased usage would therefore expectedly lead to an increased TFA burden over the last few decades. Here, we show that the concentration of TFA in 113 Danish groundwater monitoring wells is strongly correlated to the groundwater recharge year, as derived from the tritium-helium dating method. TFA was not detected in tritium-free groundwater recharged before 1960, while it was detected at low concentrations in most samples recharged between 1960 and 1980. Groundwater recharged after 1980 had at least 0.1 μg/L TFA, and the concentration increased with time. Shallow groundwater from natural “background” areas revealed some variation of TFA even with diffuse atmospheric deposition as the only source, but additional local sources must contribute TFA to some of the monitoring wells. As an important side aspect, TFA may prove very useful as a simple indicator of groundwater age, such as the presence of young water in a groundwater abstraction well.</p>\",\"PeriodicalId\":37,\"journal\":{\"name\":\"Environmental Science & Technology Letters Environ.\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.9000,\"publicationDate\":\"2024-09-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Science & Technology Letters Environ.\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acs.estlett.4c00525\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Science & Technology Letters Environ.","FirstCategoryId":"1","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.estlett.4c00525","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
A 60-Year Increase in the Ultrashort-Chain PFAS Trifluoroacetate and Its Suitability as a Tracer for Groundwater Age
Trifluoracetate (TFA) is an extremely mobile and persistent ultra-short-chain per- and polyfluoroalkyl substance (PFAS), found ubiquitously in the environment. Oxidation of certain fluorinated gases in the atmosphere is considered the primary source of TFA in the terrestrial environment, and the combined change in gas type and increased usage would therefore expectedly lead to an increased TFA burden over the last few decades. Here, we show that the concentration of TFA in 113 Danish groundwater monitoring wells is strongly correlated to the groundwater recharge year, as derived from the tritium-helium dating method. TFA was not detected in tritium-free groundwater recharged before 1960, while it was detected at low concentrations in most samples recharged between 1960 and 1980. Groundwater recharged after 1980 had at least 0.1 μg/L TFA, and the concentration increased with time. Shallow groundwater from natural “background” areas revealed some variation of TFA even with diffuse atmospheric deposition as the only source, but additional local sources must contribute TFA to some of the monitoring wells. As an important side aspect, TFA may prove very useful as a simple indicator of groundwater age, such as the presence of young water in a groundwater abstraction well.
期刊介绍:
Environmental Science & Technology Letters serves as an international forum for brief communications on experimental or theoretical results of exceptional timeliness in all aspects of environmental science, both pure and applied. Published as soon as accepted, these communications are summarized in monthly issues. Additionally, the journal features short reviews on emerging topics in environmental science and technology.