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

被引：15

作者：

Yang, Kai ^{[1
]}

Wang, Gang ^{[1
]}

Liu, Fulong ^{[1
]}

Wang, Xin ^{[1
]}

Chen, Xuemin ^{[1
]}

机构：

[1] Lanzhou Jiaotong Univ, Sch Environm & Municipal Engn, Lanzhou 730070, Gansu, Peoples R China

来源：

WATER SCIENCE AND TECHNOLOGY | 2019年 / 79卷 / 12期

关键词：

chelation precipitation; chitosan; heavy metal wastewater; macromolecule flocculant; removal mechanism; xanthation; WASTE-WATER; SOFT ACIDS; HARD; PERFORMANCE; MECHANISM; CR(VI); BASES; CU2+;

D O I：

10.2166/wst.2019.230

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 Cr3+, Cu2+, Mn2+, Ni2+, Pb2+ and Zn2+. It has a good potential for practical application. In a flocculation test of a mixed component solution, the removal rates of Cr2+, Cu2+ and Cd2+ 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 Cr2+ and Cu2+ is obviously superior to that for Cd2+; XCTS is easier to combine with the heavy metal ions belonging to hard acids.

引用

页码：2289 / 2297

页数：9

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