Removal of chromium(VI) from aqueous solutions using polypyrrole-based magnetic composites

被引：13

作者：

Sun, Wanhong ^{[1
]}

Zhou, Yanqing ^{[2
]}

Su, Qiong ^{[3
]}

Chen, Lihua ^{[1
]}

Wang, Yanbin ^{[3
]}

Liu, Juanli ^{[3
]}

Sun, Yu ^{[1
]}

Ma, Huixia ^{[3
]}

机构：

[1] Northwest Univ Nationalities, Expt Ctr, Lanzhou 730030, Peoples R China

[2] Lanzhou Petr Coll Vocat Technol, Dept Petrochem Engn, Lanzhou 730060, Peoples R China

[3] Northwest Univ Nationalities, Coll Chem Engn, Lanzhou 730030, Peoples R China

来源：

POLYMER BULLETIN | 2017年 / 74卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Polypyrrole; Magnetic composites; Chromium removal; CHEMICAL OXIDATIVE POLYMERIZATION; HEXAVALENT CHROMIUM; WASTE-WATER; CR(VI); NANOCOMPOSITE; NANOPARTICLES; FABRICATION; ADSORPTION;

D O I：

10.1007/s00289-016-1769-1

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

PPy/Fe3O4/AgCl composites were prepared via in situ polymerization for the removal of highly toxic Cr(VI). The structure and morphology of the prepared composites were characterized by the XRD, SEM, TEM, and VSM examinations. Up to 100 % removal was found with 1000 mg/L Cr(VI) aqueous solution at pH 2.0. The process of Cr(VI) ions' adsorption was easy to reach equilibrium at higher temperatures. Adsorption results showed that Cr(VI) removal efficiency by the composites decreased with an increase in pH. Adsorption kinetics was described by the pseudo-second-order rate model. Isotherm data fitted well to the Langmuir isotherm model. Desorption experiment showed that the regenerated adsorption of PPy/Fe3O4/AgCl can be reused successfully for three times successive adsorption-desorption cycles without appreciable loss of its original capacity.

引用

页码：1157 / 1174

页数：18

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