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Vol. 25 No. 11 (2013): Vol 25 Issue 11

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Kinetics and Thermodynamics of Cr3+ Adsorption on Modified Palm Thread

https://doi.org/10.14233/ajchem.2013.14225
Wengang Lv
College of Resource and Environmental Engineering, East China University of Science and Technology, No. 130, Meilong Road, Shanghai, 200237, P.R. China ; Key Laboratory of Coal Gasification & Energy Chemical Engineering of Ministry of Education, East China University of Science & Technology, Shanghai 200237, P.R. China
Bing He
College of Resource and Environmental Engineering, East China University of Science and Technology, No. 130, Meilong Road, Shanghai, 200237, P.R. China ; Key Laboratory of Coal Gasification & Energy Chemical Engineering of Ministry of Education, East China University of Science & Technology, Shanghai 200237, P.R. China
Yanbo Zhou
College of Resource and Environmental Engineering, East China University of Science and Technology, No. 130, Meilong Road, Shanghai, 200237, P.R. China ; Key Laboratory of Coal Gasification & Energy Chemical Engineering of Ministry of Education, East China University of Science & Technology, Shanghai 200237, P.R. China
Haibing Qiu
College of Resource and Environmental Engineering, East China University of Science and Technology, No. 130, Meilong Road, Shanghai, 200237, P.R. China ; Key Laboratory of Coal Gasification & Energy Chemical Engineering of Ministry of Education, East China University of Science & Technology, Shanghai 200237, P.R. China
Jun Lu
College of Resource and Environmental Engineering, East China University of Science and Technology, No. 130, Meilong Road, Shanghai, 200237, P.R. China ; Key Laboratory of Coal Gasification & Energy Chemical Engineering of Ministry of Education, East China University of Science & Technology, Shanghai 200237, P.R. China

Corresponding Author(s) : Jun Lu

shimily666@163.com; lujun@ecust.edu.cn

Asian Journal of Chemistry, Vol. 25 No. 11 (2013): Vol 25 Issue 11

Abstract

Adsorption of Cr3+ from aqueous was studied by using a novel adsorbent i.e. (NaOH-PT), palm thread (PT) modified with sodium hydroxide. The electron microscopy, infrared spectroscopy and X-ray diffraction were used to analyze the sorbents before and after modification. The effects of initial pH and contact time on the adsorption were examined. The results showed that the adsorption capacity reached the maximum at pH of 6.0 and the adsorption reached the equilibrium about 8 h. At different temperatures, the adsorption kinetics was better meet the Lagergren pseudo second kinetic model. And the whole adsorption process was controlled by liquid film diffusion and particle diffusion. The adsorption isotherms were better fitted Langmuir adsorption model. According to the calculations of thermodynamic equation, DG < 0, DH = 35.4584 kJ mol-1, DS = 139.9828 J mol-1, those indicated that the adsorption was spontaneous, endothermic, entropy increase and belonged to chemical adsorption.

Keywords

Adsorption Modified palm thread Chromium(III)
Lv, W., He, B., Zhou, Y., Qiu, H., & Lu, J. (2013). Kinetics and Thermodynamics of Cr3+ Adsorption on Modified Palm Thread. Asian Journal of Chemistry, 25(11), 5993–5997. https://doi.org/10.14233/ajchem.2013.14225
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