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Title:Dilution Effect of Mulch on PFAS Leaching from a Biosolid-amended Reclaimed Land
Author(s):Peter, Lynda
Subject(s):per- and polyfluoroalkyl substances
Abstract:Biosolids are widely used as soil amendments due their high nutrient contents and ability to improve soil physio-chemical properties; however, not without some environmental concerns. More recently, there have been rising concerns about potential groundwater contamination with per- and polyfluoroalkyl substances (PFAS) leaching from lands receiving biosolids. This study compared PFAS leaching between biosolids applied to an artificially constructed soil in its natural state and biosolids blended with mulch. Leachates were collected over the period of 2 years from zero-tension drainage lysimeters installed 15 cm below the soil surface. They were spiked with isotopically labeled PFAS, and then processed through a solid-phase extraction for quantification using liquid chromatography MS/MS. Concentrations of quantifiable PFAS in leachates corresponded with PFAS levels in treatments. Blending biosolids with mulch at a 0.75:1 ratio reduced PFAS loads in leachates by approximately 30%. Conversely, temporal trends and distribution of PFAS species were similar between both treatments with short chain perfluoro acids (
Issue Date:2022-04-27
Series/Report:2022 Emerging Contaminants in the Environment Conference (ECEC22)
Genre:Presentation / Lecture / Speech
Conference Paper / Presentation
Date Available in IDEALS:2022-05-04

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