Can biochar and designer biochar be used to remediate per- and polyfluorinated alkyl substances (PFAS) and lead and antimony contaminated soils?

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ID: 67382
2019
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Abstract
Designer biochars can be used to remediate organic and inorganic contaminant polluted soils. Here, a waste timber biochar (BC), a coconut shell activated biochar (aBC) and a wood shrub iron enriched designer biochar (Fe-BC) were investigated. Per- and polyfluorinated alkyl substances (PFAS) contaminated soils with different total organic carbon (TOC) contents (1.6 and 34.2%) were amended with six doses of BC and aBC. Two shooting range soils (TOC 5.2 and 10.2%) contaminated with heavy metals (mainly Pb and Sb) were amended with four doses of BC and Fe-BC. An amendment of 20% BC reduced the PFOS leachate concentration by 86% for the low TOC soil but was not effective for the high TOC soil. An amendment of 1% aBC reduced PFOS leachate concentrations by over >96% for both soils. For the low TOC shooting range soil, a 20% amendment of BC reduced Pb and Sb leaching by 61% and 12%, respectively. An amendment of 20% Fe-BC to soil with low TOC reduced Pb and Sb leaching by 99% and 40%, respectively. The need for "designer" biochars using processes such as iron enrichment or activation should be considered depending on the TOC of the soil, the type of contaminants and remediation goals.
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silvani2019canthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Silvani, Ludovica;Cornelissen, Gerard;Botnen Smebye, Andreas;Zhang, Yaxin;Okkenhaug, Gudny;Zimmerman, Andrew R;Thune, Gorm;Sævarsson, Hilmar;Hale, Sarah E;
Journal The Science of the total environment
Year 2019
DOI
S0048-9697(19)33625-3
URL
Keywords
sorption pfas activated biochar iron enriched biochar shooting range soil

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