English  |  正體中文  |  简体中文  |  Items with full text/Total items : 17775/20116 (88%)
Visitors : 10015595      Online Users : 601
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/25322

    標題: Adsorption of Copper (II) and Lead (II) ions from Aqueous Solution on Chitosan-Coated 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: Chitosan
    Permeable reactive barrier
    日期: 2010-05
    上傳時間: 2012-05-31 09:57:32 (UTC+8)
    摘要: Biodegradable material, known as chitosan-coatedsand (CCS), was utilized for removal ofcopper (II) andlead (II) ions in water. Batch experiments were conducted to investigate the adsorption effect under different initial concentration (Co = 100, 500, 1000 and 2000 mg/L), solution pH (2, 3, 4, 5 and 6), and contact time (0.5, 1, 2, 4, 6, 12 and 24 h). Desorption studies were performed using diluted HCl solution (pH 1 and 3) and tap water (pH 7) on adsorbed metal ions. Langmuir and Freundlich adsorption models were used to describe static isotherms and constants. The data fitted well with Langmuir model at Qmax value of 8.18 and 12.32 mg/g CCS for Cu(II) and Pb(II) ions at 4 h contact time, respectively. Kinetic studies followed the pseudo second-order reaction, which indicated that the chemical sorption is the rate-limiting step. Results of desorption process signified potential for recovering metal ionsfrom CCS.
    關聯: Carbohydrate Polymers 80(3):p.891-899
    Appears in Collections:[環境工程與科學系(所)] 期刊論文

    Files in This Item:

    File Description SizeFormat
    99_95_j.pdf457KbAdobe PDF816View/Open

    All items in CNU IR are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback