Influence of the pore structure and surface chemical properties of activated carbon on the adsorption of mercury from aqueous solutions

被引：71

作者：

Lu, Xincheng

Jiang, Jianchun ^{[1
]}

Sun, Kang

Wang, Jinbiao

Zhang, Yanping

机构：

[1] CAF, Inst Chem Ind Forest Prod, Nanjing 210042, Jiangsu, Peoples R China

来源：

MARINE POLLUTION BULLETIN | 2014年 / 78卷 / 1-2期

关键词：

Activated carbon; Mercury; Adsorption; Pore structure; Surface functional groups; Adsorption mechanism; ELEMENTAL MERCURY; WASTE-WATER; REMOVAL; PERFORMANCE; CHLORIDE; KINETICS; LEAD;

D O I：

10.1016/j.marpolbul.2013.11.007

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Reactivation and chemical modification were used to obtain modified activated carbons with different pore structure and surface chemical properties. The samples were characterized by nitrogen absorption-desorption, Fourier transform infrared spectroscopy and the Bothem method. Using mercury chloride as the target pollutant, the Hg2+ adsorption ability of samples was investigated. The results show that the Hg2+ adsorption capacity of samples increased significantly with increases in micropores and acidic functional groups and that the adsorption process was exothermic. Different models and thermodynamic parameters were evaluated to establish the mechanisms. It was concluded that the adsorption occurred through a monolayer mechanism by a two-speed process involving both rapid adsorption and slow adsorption. The adsorption rate was determined by chemical reaction. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：69 / 76

页数：8

共 32 条

[1] Preparation of activated carbons from coffee residue for the adsorption of formaldehyde [J].