Preparation of a Novel Millet Straw Biochar-Bentonite Composite and Its Adsorption Property of Hg²⁺ in Aqueous Solution.

ABSTRACT: The remediation of mercury (Hg) contaminated soil and water requires the continuous development of efficient pollutant removal technologies. To solve this problem, a biochar-bentonite composite (CB) was prepared from local millet straw and bentonite using the solution intercalation-composite heating method, and its physical and chemical properties and micromorphology were then studied. The prepared CB and MB (modified biochar) had a maximum adsorption capacity for Hg²⁺ of 11.722 and 9.152 mg·g^-1, respectively, far exceeding the corresponding adsorption value of biochar and bentonite (6.541 and 2.013 mg·g^-1, respectively).The adsorption of Hg²⁺ on the CB was characterized using a kinetic model and an isothermal adsorption line, which revealed that

SUBMITTER: Bai Y 

PROVIDER: S-EPMC7957562 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature