Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/22026
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 18268/20495 (89%)
Visitors : 8614669      Online Users : 649
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


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://ir.cnu.edu.tw/handle/310902800/22026


    题名: Efficiency of Reductive Dechlorination of Trichloroethylene and CIS-1,2-Dichloroethylene by Iron Filling
    作者: Mullika Teerakun
    Alissara Reungsang
    Chien-Jung Lin
    Chih-Hsiang Liao
    贡献者: 環境工程與科學系
    关键词: Trichioroethylene
    TCE
    cis-DCE
    Iron filling
    Reductive dechlorination
    日期: 2008-05
    上传时间: 2009-11-27 15:51:44 (UTC+8)
    摘要: This study aimed to evaluate the possibility of using iron filling from machine shops as a low- cost reactive medium for treating groundwater contaminated by trichloroethylene (TCE) and czs-1,2-dichloroethylene (cis-DCE) The efficiency of reductive dechlorination of trichioroethylene and czs-1,2-dichloroethylene (cis-DCE) by iron filling were further studied in different concentrations at pH 5. The initial TCE and cis-DCE concentrations ranged from 1 to 1000 mg/L. The results showed that the degradation rates of these contaminants were rapid at low concentration and relatively slow at high concentration. At day 7, the removal was 100% with the initial TCE concentrations of 1 and 10 mg/L and with the initial DCE concentrations of 1, 10, 25, 50 and 100 mg/L. The observed pseudo-first order rate constants for TCE and DCE degradations were 0.29 to 0.94 day and 0.33 to 1.39 day1, respectively. The result showed that the rate constant of cis-DCE was higher than TCE. The major products in the dechlorination of TCE were ethylene and chloride The concentrations of cis-DCE and vinyl chloride (VC) were detected in small amounts in the reductive dechlorination of TCE at day 7. In addition, with the high concentration of initial cis-DCE and TCE of 1000 mg/L, the VC accumulated in the system with concentration of 28.0 and 3.47 mg/L found at day 7, respectively The increase of chloride in the aqueous solution indicated that the degradation of contaminants was the result of its reductive dechlorination which occurred by transferring electrons from the surface of metallic iron to the contaminants. These results elucidated that Iron fillings from machine shops could served as an alternative reactive medium for the remediation of groundwater contaminated with chlorinated contaminants.
    關聯: 2008 International Conference on Environmental Quality Concern,Control and Conservation,起迄日:2008/5/23~2008/5/24,地點:Chia Nan University of pharmacy and Science
    显示于类别:[Dept. of Environmental Engineering and Science (including master's program)] Proceedings

    文件中的档案:

    档案 描述 大小格式浏览次数
    97_173_pro.pdf371KbAdobe PDF847检视/开启


    在CNU IR中所有的数据项都受到原著作权保护.

    TAIR相关文章

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