Enhancement of exchangeable Cd and Pb immobilization in contaminated soil using Mg/Al LDH-zeolite as an effective adsorbent.

ABSTRACT: In the present study, experiments using zeolite and Mg/Al LDH-zeolite for immobilization of Cd and Pb ions in artificial soil were conducted. The conditions which affect Cd and Pb ion immobilization in soil were evaluated, namely soil pH (5-7), the mass ratio of adsorbents (1%, 3% and 5%), incubation time (15 days, 30 days and 45 days) and soil moisture (30%, 50% and 70%). The results indicated that the optimal soil pH, mass ratio of adsorbents, incubation time and soil moisture for immobilization of Cd and Pb ions by the adsorbent were, respectively, 7.0, 3%, 30 days and 70%. The exchangeable Cd ion content in the contaminated soil dropped from 22.17 mg kg^-1 (87.65%) to 11.03 mg kg^-1 (43.48%) and 6.47 mg kg^-1 (26.36%) on incubation with zeolite and Mg/Al L

SUBMITTER: Dang VM 

PROVIDER: S-EPMC9031545 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature