The functional polypyrrole composite: a class of high-performing Cr(VI) ion adsorbents

被引：8
作者：
Sun, Wanhong [1 ]
Chen, Lihua [1 ]
Sun, Yu [1 ]
Su, Qiong [2 ]
Wang, Yanbin [2 ]
Liu, Juanli [2 ]
机构：
[1] Northwest Univ Nationalities, Expt Ctr, Lanzhou 730030, Peoples R China
[2] Northwest Univ Nationalities, Coll Chem Engn, Lanzhou 730030, Peoples R China
来源：
JOURNAL OF POROUS MATERIALS | 2017年 / 24卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Polypyrrole; Magnetic composites; Chromium removal; HEXAVALENT CHROMIUM; WASTE-WATER; REMOVAL; NANOPARTICLES; ADSORPTION;
D O I：
10.1007/s10934-016-0287-8
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
An ultrasound-assisted situ oxidation process has been demonstrated for the Cr(VI) adsorption experiment with PPy, PPy/Fe3O4 and PPy/Fe3O4/AgCl composite in a relatively wide pH range. The PPy, PPy/Fe3O4 and PPy/Fe3O4/AgCl composite were characterized with XRD, SEM, TEM and VSM measurements, and were further tested in the role of Cr(VI) adsorption in aqueous solution. Up to 100 % adsorption was found with 500 or 1000 mg L-1 Cr(VI) aqueous solution at pH 3.0. Adsorption results showed that Cr(VI) removal efficiency by PPy, PPy/Fe3O4 and PPy/Fe3O4/AgCl decreased with an increase in pH. Compared with contact time (30 min) of PPy and PPy/Fe3O4 adsorbent, 15 min adsorption of PPy/Fe3O4/AgCl composite can almost reached the adsorption equilibrium. The kinetics of Cr(VI) adsorption with PPy, PPy/Fe3O4 and PPy/Fe3O4/AgCl follow the pseudo-second-order model. The eco-friendly PPy/Fe3O4/AgCl featured with magnetism and excellent reusability offers a promising adsorbent material for Cr(VI) contaminated water.
引用
收藏
页码：519 / 530
页数：12
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