The effect of Ca-bearing contents in chitosan on Pb ²⁺, Cd ²⁺ and Cu ²⁺ adsorption and its adsorption mechanism.

ABSTRACT: The preparation of chitosan has been investigated for more than half century; however, the application of chitosan for heavy metal (HM) adsorption is still under research. This study investigated the effects of chitosan with chemically controlled Ca-bearing contents (CBC) on Pb²⁺, Cd²⁺ and Cu²⁺ adsorption in the solution with the initial pH values of 2.10, 4.14 and 6.13. Highly purified chitosan showed the optimum HM adsorption at the initial pH values of 4.14 and 6.13, and the adsorption mechanism was chemisorption involving valence forces through sharing or exchange of electrons between the chitosan and HM ions. Highly purified chitosan prepared from HCl treated chitin only showed effective for Pb²⁺, however, those prepared from CH₃C

SUBMITTER: Alam O 

PROVIDER: S-EPMC7721838 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature