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

Journal of Water Reuse and Desalination

Chen, Jianlong¹  Lu, Xinwei¹ 

[1] School of Tourism and Environment, Shaanxi Normal University, Xi'an 710062, China E-mail:

关键词: cadmium;    coal gangue;    kinetic;    sorption;    zeolite NaX;   

DOI  :  10.2166/wrd.2016.137

学科分类：工程和技术（综合）

来源: IWA Publishing

【 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.

【 授权许可】

CC BY-NC-ND