Three-dimensional composite hydrogel based on polyamine zirconium oxide, alginate and tannic acid with high performance for Pb(II), Hg(II) and Cr(VI) trapping

被引:20
作者
Zhang, Yun [1 ]
He, Fu [1 ]
Li, Xiaoli [2 ]
机构
[1] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Coll Resources & Environm Sci, Lanzhou 730000, Peoples R China
基金
中国国家自然科学基金;
关键词
Three-dimensional hydrogels; Polyamine zirconium oxide; Tannic acid; Alginate; Heavy metal trapping; AQUEOUS-SOLUTIONS; HYBRID MATERIAL; METALS REMOVAL; ADSORPTION; LEAD; BIOSORPTION; WATER; NANOPARTICLES; CADMIUM; RESIN;
D O I
10.1016/j.jtice.2016.05.023
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In this study, preparation of multifunctional polymer hydrogels (Zr-DETA/TS) was achieved via organic inorganic crosslinking to form three-dimensional network structure for application of Pb2+, Hg2+ and CrO42- extraction. The equilibrium data of Pb2+, Hg2+ and CrO42- were best described by the Langmuir isotherm, and the kinetic data were found to follow the pseudo-second-order kinetic model. It was notable that ionic exchange and complexation were the main adsorption mechanism for Pb2+ and Hg2+ while electrostatic attraction, inner-sphere complex and esterification played an important role in CrO42- adsorption. Thus, Zr-DETA/TS hydrogels could be used as a promising biomaterial for Pb2+, Hg2+ and CrO42- removal from wastewaters. (C) 2016 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:304 / 311
页数:8
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