Water and Remediation Catalog.

Authors: Chenyang Wang, Bei Yan, Gabriel Munoz, Sébastien Sauvé, Jinxia Liu

DOI: https://doi.org/10.1002/aws2.1241

Synopsis:

• Modified bentonite clays were evaluated as amendments in AFFF-impacted soils to decrease PFAS leaching further into soil or groundwater using Toxicity Characteristic Leaching Procedure (TCLP)
• Batch leaching experiments indicate 95-99% reduction in anionic PFAS leaching with 0.5% w/w of adsorbent. Cationic and zwitterionic PFAS leaching reduction was observed from 70-99%
• The effectiveness of anionic PFAS immobilization was as follows: FLUORO-SORB® Adsorbent >  GAC > Biochar. For cationic PFAS, GAC moderately outperformed FLUORO-SORB® Adsorbent

Brief: FLUORO-SORB® Adsorbent has been proven to be a strong immobilizing amendment, even at low doses, for PFAS stabilization in soil, with the highest performance for anionic PFAS leaching reduction (95-99%) as compared to GAC and Biochar amendments.