期刊
JOURNAL OF WATER PROCESS ENGINEERING
卷 4, 期 -, 页码 47-57出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jwpe.2014.09.003
关键词
Magnetic adsorbent; Polyacrylamide; Hydroxamic acid; Heavy metal; Adsorption
资金
- Hunan Provincial Innovation Foundation for Postgraduate [CX2010B220]
- Hunan Industrialization Fostering Projects for Universities [12CY004]
A novel magnetic hydroxamic acid modified polyacrylamide/Fe3O4 adsorbent (M-PAM-HA) was prepared with acrylamide by microemulsion polymerization and then nucleophilic substitution of hydroxamic acid. The morphology, structure of the magnetic adsorbents before (M-PAM) and after modification (M-PAM-HA) were characterized and their adsorption properties for the removal of metal ions by varying test conditions were also investigated. The modified M-PAM exhibited lower swelling property and less magnetic leaching than M-PAM. Their adsorption kinetics followed the pseudo-second order model. The maximum adsorption capacities of metal ions ranged from 0.11 to 0.29 mmol g(-1) for M-PAM and 0.88-1.93 mmol g(-1) for M-PAM-HA, respectively. Sips model fitting well to experimental data revealed the surface heterogeneity of the prepared adsorbents. In multi-metal systems, M-PAM-HA showed the relative selectivity toward Pb(II), although Pb(II) was adsorbed the least in their corresponding one-metal systems. The adsorption mechanism was proposed based on the results of FTIR and density functional theory (DFT) calculation. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据