Remediation options to reduce bioaccessible and bioavailable lead and arsenic at a smelter impacted site - consideration of treatment efficacy.

ABSTRACT: In this study, smelter contaminated soil was treated with various soil amendments (ferric sulfate [Fe₂(SO4)₃], triple superphosphate [TSP] and biochar) to determine their efficacy in immobilizing soil lead (Pb) and arsenic (As). In soils incubated with ferric sulfate (0.6M), gastric phase Pb bioaccessibility was reduced from 1939 ± 17 mg kg^-1 to 245 ± 4.7 mg kg^-1, while intestinal phase bioaccessibility was reduced from 194 ± 25 mg kg^-1 to 11.9 ± 3.5 mg kg^-1, driven by the formation of plumbojarosite. In TSP treated soils, there were minor reductions in gastric phase Pb bioaccessibility (to 1631 ± 14 mg kg^-1) at the highest TSP concentration (6000 mg kg^-1) although greater reductions were observed in th

SUBMITTER: Alankarage D 

PROVIDER: S-EPMC10843775 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature