Low-cost novel silica@polyacrylamide composites: fabrication, characterization, and adsorption behavior for cadmium ion in aqueous solution

被引:35
作者
Hu, Xiayi [1 ,5 ]
Luo, Xuanping [1 ]
Xiao, Gongkui [2 ]
Yu, Qian [1 ]
Cui, Yuanyuan [1 ]
Zhang, Gang [1 ]
Zhang, Rui [1 ]
Liu, Yang [3 ]
Zhou, Yefeng [1 ]
Zeng, Zhaogang [4 ,5 ]
机构
[1] Xiangtan Univ, Coll Chem Engn, Xiangtan 411105, Peoples R China
[2] Univ Western Australia, Dept Chem Engn, 35 Stirling Hwy, Crawley, WA 6009, Australia
[3] Hunan BG Well Point Environm Sci & Technol Co Ltd, Changsha 41000, Peoples R China
[4] Xiangtan Sepiolite Technol Co Ltd, Xiangtan 411100, Peoples R China
[5] Hunan Provincal Engn Res Ctr Sepiolite Resource E, Xiangtan 411100, Hunan, Peoples R China
来源
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY | 2020年 / 26卷 / 07期
基金
中国国家自然科学基金;
关键词
Amino-functionalized silica; Polyacrylamide; Cadmium ion capture; Wastewater; Cost estimation; HEAVY-METAL IONS; MESOPOROUS SILICA; EFFICIENT REMOVAL; ACTIVATED CARBON; CD(II) IONS; KINETICS; ADSORBENT; PB(II); RESIN; PB2+;
D O I
10.1007/s10450-020-00225-4
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Pollution during rapid industrialization process is a serious environmental problem that seriously affects people's lives and livelihoods. Among them, the pollution of excessive heavy metals in wastewater has attracted wide attention. The current study proposes a novel effective and low-cost silica@polyacrylamide composites (SP-C) to capture cadmium ion (Cd2+) from wastewater contaminated by heavy metal. The chemical and physical properties of the surface and interior of silica@polyacrylamide composites were studied by different characterization methods. The adsorption capacity and kinetics of cadmium ions in aqueous solutions using silica@polyacrylamide composites were also studied, and some discussions about the mechanism of adsorption process were made. Silica@polyacrylamide composites showed enhanced cadmium ions adsorption with the maximum adsorption capacity of 211.86 mg/g (pH 6.5, T = 318.15 K), which was fitted by Langmuir model. The adsorption experimental kinetic data of silica@polyacrylamide composites could be excellently verified by pseudo-second-order model. Moreover, a comparison of the cost between the proposed silica@polyacrylamide composites and other reported adsorbents is provided. And the results indicate that the silica@polyacrylamide composites adsorption cost is 0.16 $/g cadmium ion, which means a promising cost-effective adsorbent for cadmium ion removing.
引用
收藏
页码:1051 / 1062
页数:12
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