Influences of chemically controlled Ca-bearing minerals in chitosan on Pb²⁺ removal efficiency.

ABSTRACT: Highly purified chitosan was generally preferred for heavy metal (HM) removal and the preparation parameters varied largely without any agreement. This study investigated to the influences of chitin with different purities on the HM removal of corresponding chitosan. Sea shrimp waste was used as raw materials and Pb²⁺ was used as target HM. The results of orthogonal experimental analysis showed that only acid concentration played an important role in the deproteinization and demineralization processes of the chitin preparation under HCl, H₂SO₄ and CH₃COOH treatment. Ca-bearing minerals (CBM) but not free -NH₂ group of chitosan played a major role in the removal of Pb²⁺ from solution. Partly purified chitosan mainly removed P

SUBMITTER: Alam O 

PROVIDER: S-EPMC7721843 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature