ASIA unversity:Item 310904400/16222
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 89914/105178 (85%)
造访人次 : 4833267      在线人数 : 419
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://asiair.asia.edu.tw/ir/handle/310904400/16222


    题名: Comment on "Biosorption of Cr(VI) from aqueous solutions onto Hydrilla verticillata weed: equilibrium, kinetics and thermodynamic studies"
    作者: 何玉山;Ho, Yuh-Shan
    贡献者: 生物科技學系
    日期: 2012
    上传时间: 2012-11-23 17:10:08 (UTC+8)
    摘要: This work reports the ability of nonliving Hydrilla verticillata, an aquatic macrophyte to remove Cr(VI) from it's aqueous solutions. The biosorbent was characterized by finding the bulk density, BET surface area, porosity and pore volume. SEM combined with EDX was used to study the surface morphology of the biosorbent. FTIR spectrum analysis of the native and Cr(VI) loaded biosorbent revealed that O--H, N--H and C--O groups were the leading Cr(VI) binding groups. The efficiency of Cr(VI) removal was studied as a function of contact time, initial Cr(VI) concentration, pH, biosorbent dose, temperature and agitation speed. It was found that the initial pH of the solution greatly affected the Cr(VI) sorption efficiency. Optimum biosorption conditions were found to be pH 1.0, 0.1 g L-1 biosorbent dosage, 200 rpm agitation speed and 200 min equilibrium time. An increase in temperature, increased the removal of Cr(VI) which indicated that the biosorption process was endothermic in nature. The biosorption kinetics followed the pseudo-second-order model closely and intra-particle diffusion was found to be the rate-controlling mechanism. The fitness of biosorption equilibrium data for Langmuir and Freundlich isotherm models were tested and it was found that the biosorption system was more likely monolayer coverage of H. verticillata biomass by the chromium ions.
    關聯: Environmental Engineering and Management Journal; 9(12):1715
    显示于类别:[生物科技學系] 期刊論文

    文件中的档案:

    没有与此文件相关的档案.



    在ASIAIR中所有的数据项都受到原著作权保护.


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