Adsorption of aqueous metal ions on cattle-manure-compost based activated carbons

被引:122
|
作者
Zaini, Muhammad Abbas Ahmad [1 ]
Okayama, Reiko [1 ]
Machida, Motoi [1 ,2 ]
机构
[1] Chiba Univ, Grad Sch Engn, Inage Ku, Chiba 2638522, Japan
[2] Chiba Univ, Safety & Hlth Org, Inage Ku, Chiba 2638522, Japan
基金
日本学术振兴会;
关键词
Activated carbon; Adsorption isotherm; Cattle-manure-compost; Copper; Lead; Solution pH; ISOTHERM; REMOVAL; SHELL;
D O I
10.1016/j.jhazmat.2009.05.090
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The objective of this study is to examine the suitability and performance of cattle-manure-compost(CMC) based activated carbons in removing heavy metal ions from aqueous solution. The influence of ZnCl2 activation ratios and solution pH on the removal of Cu(II) and Pb(II) were studied. Pore texture. available surface functional groups, pH of point zero charge (pH(PZC)), thermogravimetric analysis and elemental compositions were obtained to characterize the activated carbons. Batch adsorption technique was used to determine the metal-binding ability of activated carbons. The equilibrium data were characterized using Langmuir, Freundlich and Redlich-Peterson models. It was found that the uptake of aqueous metal ions by activated carbons could be well described by Langmuir equation. It is suggested that the increase of surface area and mesopore ratio as a result of increasing activation ratios favored the removal of Cu(II), while activated carbon rich in acidic groups showed selective adsorption towards Pb(II). The preferable removal of Cu(II) over Pb(II) could be due to the rich nitrogen content as well as the higher mesoporous surface area in the CIVIC activated carbons. The impregnated CMC activated carbons also showed a better performance for Cu(II) removal at varying solution pH than Filtrasorb 400 (17400), while a similar performance was observed for Pb(II) removal. (C) 2009 Elsevier BY. All rights reserved.
引用
收藏
页码:1119 / 1124
页数:6
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