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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/22018


    標題: Adsorption of Copper and Lead by Chitosan Immobilized on Sand
    作者: Meng-Wei Wan
    Chi-Chuan Kan
    Buenda D. Rogel
    Maria Lourdes P. Dalida
    貢獻者: 環境工程與科學系
    關鍵字: Cupper
    Lead
    Adsorption
    Chitosan-coated-clay
    Chitosan-coated sand
    日期: 2008-11
    上傳時間: 2009-11-27 15:50:29 (UTC+8)
    摘要: In recent years, biopolymers have been recognized as an effective adsorbent for removal of metal ions in water, especially the Chitosan which is derived from deacetylation of chitin. In this study, adsorption of Cu2+ and Pb2+ ions onto chiyosan-coated sand were investigated. The experiments were carried out through batch adsorption studied. Several parameters were evaluated such as the effect of initial metal ions concentration range 100-2000 mg/L, pH of the solution and contact time. The equilibrium adsorption datd were analyzed using Langmuir and Freundich isotherm models. The model that fitted the result best was the Langmuir isotherm model. The maximum adsorption capcities calculated from Langmuir adsorption isotherm were 8.50 and 11.91 mg/g chitosan-coated sand for Cu2+ and Pb2+, respectively. The kinetic data were tested and followed pseudo-second order reaction which indicated that the chemical sorption was the rate-limiting step.
    Appears in Collections:[環境工程與科學系(所)] 會議論文

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