Equilibrium and kinetics studies of Cd(II) sorption on zeolite NaX synthesized from coal gangue

被引：29

作者：

Chen, Jianlong ^{[1
]}

Lu, Xinwei ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Sch Tourism & Environm, Xian 710062, Shaanxi, Peoples R China

来源：

JOURNAL OF WATER REUSE AND DESALINATION | 2018年 / 8卷 / 01期

基金：

中国国家自然科学基金;

关键词：

cadmium; coal gangue; kinetic; sorption; zeolite NaX; AQUEOUS-SOLUTIONS; ACTIVATED CARBON; BASIC DYE; REMOVAL; CADMIUM; ADSORPTION; IONS; SYSTEMS; SINGLE;

D O I：

10.2166/wrd.2016.137

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The adsorption of Cd(II) from aqueous solution by synthesized zeolite NaX from coal gangue was investigated in a batch adsorption system. The studies include both equilibrium adsorption isotherms and kinetics. Different isotherm models were examined and the adsorption isotherm could be best represented with Langmuir. The adsorption kinetic experimental data were found to be better fitted with the pseudo-second-order kinetic model. An intra-particle diffusion model was employed to investigate the adsorption mechanism. The results showed that the intra-particle diffusion step was not the only rate limiting step. According to the Langmuir equation, the maximum adsorption capacity was 38.61 mg/g, suggesting that zeolite NaX synthesized from coal gangue can be used as a potential green alternative for the removal of Cd(II) from aqueous solution.

引用

页码：94 / 101

页数：8

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