Simultaneous removal of multiple heavy metals from soil by washing with citric acid and ferric chloride.

ABSTRACT: The remediation of soil contaminated with multiple heavy metals is a matter of great concern due to its serious threat to the ecosystem and human health. Batch and slurry reactor soil washing experiments were conducted to explore the removal of Cd, Cr, Pb and Zn using 7 agents. Citric acid (CA) and ferric chloride (FeCl₃) exhibited an obvious synergistic effect on the removal of heavy metals. Furthermore, the concentration of heavy metals in different soil particle size fractions was closely related to the soil element concentrations. Fine sand (0.05-0.25 mm) had a strong adsorption capacity for Cr and Pb because of the high Mn concentration. Notably, heavy metals in smaller-size soil particles could be efficiently removed by CA and FeCl₃. After remediation, the bioav

SUBMITTER: Shi J 

PROVIDER: S-EPMC9049904 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature