Effective and regenerable Ag/graphene adsorbent for Hg(II) removal from aqueous solution

被引：52
作者：
Qu, Zan [1 ]
Fang, Li [1 ]
Chen, Dongyao [1 ]
Xu, Haomiao [1 ]
Yan, Naiqiang [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
来源：
FUEL | 2017年 / 203卷
基金：
中国国家自然科学基金;
关键词：
Hg2+; Adsorbent; Graphene; Silver; Regeneration; FUEL GAS; MERCURY CAPTURE; SURFACE CHARACTERIZATION; SILVER NANOPARTICLES; ACTIVATED CARBON; SORBENTS; ADSORPTION; WATER; GRAPHENE; WASTE;
D O I：
10.1016/j.fuel.2017.04.105
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A novel Ag/graphene adsorbent was synthesized for the Hg(II) removal from waste water. The Ag/graphene was characterized by Fourier Transformation Infrared Spectrum (FT-IR), X-ray Diffraction (XRD), Transmission Electron Microscope (TEM) and Scanning Electron Microscope (SEM) devices. The results showed that graphene acted as a good support for Ag particles on its huge surface. The removal efficiency of Hg2+ was higher than 98% after 120 min adsorption. The optimized pH value was 5.0. There are no obvious effects of co-existed metal ions (Mn2+, Mg2+, Ca2+, Al3+ and Na+) on Hg2+ removal. Meanwhile, the adsorption isotherms and adsorption kinetics were applied to analyze the experimental data. The best interpretation was given by Freundlich isotherm equation. The kinetic adsorptions were well described by a pseudo-second-order reaction model. Furthermore, the performance of regeneration and reutilization were also investigated. The results indicated that the adsorption capacity remained stable after 6 reuse cycles. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：128 / 134
页数：7
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