Rain Amplification of Persistent Organic Pollutants

Casas Gemma; Martinez-Varela Alicia; Vila-Costa MariaJimenez BegonaDachs Jordi

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Rain Amplification of Persistent Organic Pollutants

机译：Rain Amplification of Persistent Organic Pollutants

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Scavenging of gas- and aerosol-phase organic pollutants by rain is an efficient wet deposition mechanism of organic pollutants. However, whereas snow has been identified as a key amplification mechanism of fugacities in cold environments, rain has received less attention in terms of amplification of organic pollutants. In this work, we provide new measurements of concentrations of perfluoroalkyl substances (PFAS), organophosphate esters (OPEs), and polycyclic aromatic hydrocarbons (PAHs) in rain from Antarctica, showing high scavenging ratios. Furthermore, a meta-analysis of previously published concentrations in air and rain was performed, with 46 works covering different climatic regions and a wide range of chemical classes, including PFAS, OPEs, PAHs, polychlorinated biphenyls and organochlorine compounds, polybromodiphenyl ethers, and dioxins. The rain-aerosol (KRP) and rain-gas (KRG) partition constants averaged 105.5 and 104.1, respectively, but showed large variability. The high field-derived values of KRG are consistent with adsorption onto the raindrops as a scavenging mechanism, in addition to gas-water absorption. The amplification of fugacities by rain deposition was up to 3 orders of magnitude for all chemical classes and was comparable to that due to snow. The amplification of concentrations and fugacities by rain underscores its relevance, explaining the occurrence of organic pollutants in environments across different climatic regions.

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《Environmental Science & Technology: ES&T》 |2021年第19期|12961-12972|共12页
作者
Casas Gemma; Martinez-Varela Alicia; Vila-Costa MariaJimenez BegonaDachs Jordi;
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作者单位

Spanish Natl Res Council, Inst Environm Assessment & Water Res, IDAEA, CSIC, Barcelona 08034, Spain;

Spanish Natl Res Council, Inst Organ Chem, Dept Instrumental Anal & Environm Chem, IQOG,CSIC, Madrid 28006, Spain;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
wet deposition; snow; scavenging; amplification; Antarctica; PFASs; OPEs; PAHs; PCBs; PBDEs;

Rain Amplification of Persistent Organic Pollutants

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