Removal of multiple heavy metal ions using a macromolecule chelating flocculant xanthated chitosan | Zendy

Kai Yang | Zendy; Gang Wang | Zendy; Fulong Liu | Zendy; Xin Wang | Zendy; Xuemin Chen | Zendy

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Removal of multiple heavy metal ions using a macromolecule chelating flocculant xanthated chitosan

Author(s) -

Kai Yang,

Gang Wang,

Fulong Liu,

Xin Wang,

Xuemin Chen

Publication year - 2019

Publication title -

water science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.406

H-Index - 137

eISSN - 1996-9732

pISSN - 0273-1223

DOI - 10.2166/wst.2019.230

Subject(s) - flocculation , chelation , metal ions in aqueous solution , chitosan , metal , macromolecule , chemistry , ion , heavy metals , nuclear chemistry , inorganic chemistry , environmental chemistry , organic chemistry , biochemistry

In this paper, the removal performance and mechanism of xanthated chitosan (XCTS) towards heavy metal ions are investigated. XCTS possesses both strong chelating abilities and excellent flocculation properties, which can effectively remove several kinds of heavy metal ions, such as Cr 3+ , Cu 2+ , Mn 2+ , Ni 2+ , Pb 2+ and Zn 2+ . It has a good potential for practical application. In a flocculation test of a mixed component solution, the removal rates of Cr 3+ , Cu 2+ and Cd 2+ reach 100%, 100% and 99.1%, respectively. The removal rates are significantly greater than that of a single component solution. It indicates that there is a synergistic effect between different metal ions. Moreover, the selectivity of XCTS for Cr 3+ and Cu 2+ is obviously superior to that for Cd 2+ ; XCTS is easier to combine with the heavy metal ions belonging to hard acids.

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