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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/27563


    標題: The study of copper adsorption from aqueous solution using crosslinked chitosan immobilized on bentonite
    作者: Grisdanurak, Nurak
    Akewaranugulsiri, Siripor
    Futalan, Cybelle Morales
    Tsai, Wan-Chi
    Kan, Chi-Chuan
    Hsu, Che-Wei
    Wan, Meng-Wei
    貢獻者: 環境工程與科學系
    關鍵字: Bentonite
    Adsorption
    Chitosan
    Crosslinking
    Isotherm
    日期: 2012-09-25
    上傳時間: 2014-03-21 16:13:36 (UTC+8)
    出版者: Wiley-Blackwell
    摘要: Batch experiments were performed to investigate the adsorption of Cu(II) from aqueous solution using noncrosslinked and crosslinked chitosan immobilized on bentonite (CIB). Crosslinking agents such as epichlorohydrin (ECH), glutaraldehyde (GLA), and ethylene glycol diglycidyl ether (EDGE) were utilized to improve the chemical and mechanical properties of the adsorbent. The effect of contact time, pH, and initial concentration on the adsorption capacity was determined. The adsorption capacities of the adsorbents are arranged in the following order: CIB-EDGE > CIB-ECH > CIB >> CIB-GLA. Langmuir and Freundlich equations were used to analyze the isotherm data. Equilibrium studies showed that CIB, CIB-EDGE, and CIB-ECH correlated well with the Langmuir model while CIB-GLA fits well with the Freundlich model. Kinetics of Cu(II) adsorption was best described by the pseudosecond-order equation, which indicates that chemisorption is the rate-limiting step. In the desorption study, more than 92 and 75% of Cu(II) could be recovered from CIB-EDGE and CIB-ECH beads using HCl solution (pH 1) agitated for 120 min. (C) 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
    關聯: Journal of Applied Polymer Science, 125(S2), E132-E142
    Appears in Collections:[環境工程與科學系(所)] 期刊論文

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