Per-and Poly-Fluoroalkyl Substances in Runoff and Leaching from AFFF-Contaminated Soils:a Rainfall Simulation Study

Matthew J.Richardson; Shervin Kabiri; Charles Grimison

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Per-and Poly-Fluoroalkyl Substances in Runoff and Leaching from AFFF-Contaminated Soils:a Rainfall Simulation Study

机译：Per-and Poly-Fluoroalkyl Substances in Runoff and Leaching from AFFF-Contaminated Soils:a Rainfall Simulation Study

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The mobilization and transport of per-and poly-fluoroalkyl substances(PFASs)via surface runoff(runoff)from aqueous film-forming foam(AFFF)-contaminated soils during rainfall,flooding,or irrigation has not been thoroughly evaluated,and the effectiveness of carbonaceous sorbents in limiting PFASs in runoff is similarly unquantified.Here,laboratory-scale rainfall simulations evaluate PFAS losses in runoff and in leaching to groundwater(leachate)from AFFF-contaminated soils varying in texture,PFAS composition and concentration,and remediation treatment.Leaching dominated PFAS losses in soils with a concentration of ∑_(PFAS)= 0.2-2 mg/kg.However,with higher soil PFAS concentrations(∑_(PFAS)= 31 mg/kg),leachate volumes were negligible and runoff dominated losses.The concentration and variety of PFASs were far greater in leachates regardless of the initial concentrations in soil.Losses of PFASs were dependent on the C-chain length for leachates and more on the initial concentration in soil for runoff.Suspended materials did not meaningfully contribute to runoff'losses.While concentrations of most PFASs declined significantly after the first rainfall event,desorption and transport in both runoff and leachates persisted over several rainfall events.Finally,results showed that sorption to AC mostly occurred during,not prior to,rainfall events and that 1% w/w AC substantially reduced losses in runoff and leachates from all soils.

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《Environmental Science & Technology: ES&T》 |2022年第23期|16857-16865|共9页
作者
Matthew J.Richardson; Shervin Kabiri; Charles Grimison;
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作者单位

School of Agriculture,Food and Wine,The University of Adelaide,Glen Osmond,South Australia 5064,Australia;

Ventia Proprietary Limited,North Sydney,New South Wales 2060,Australia;

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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
PFAS; rainfall; runoff; leaching; soil washing; immobilization; activated carbon;

Per-and Poly-Fluoroalkyl Substances in Runoff and Leaching from AFFF-Contaminated Soils:a Rainfall Simulation Study

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