English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 49264/83797 (59%)
造訪人次 : 7143182      線上人數 : 64
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/88299


    題名: Synergistic effects of chromium(VI) reduction/EDTA oxidization for PCB wastewater by photocatalysis combining ionic exchange membrane processes
    作者: Hsu, Hung-Te;Chen, Shiao-Shing;Chang, Wen-Shing;Li;Chi-Wang
    貢獻者: 淡江大學水資源及環境工程學系
    關鍵詞: Chromium;EDTA;Ionic exchange membrane;Photocatalysis;TiO2
    日期: 2013-01
    上傳時間: 2013-04-16 16:39:30 (UTC+8)
    出版者: Taylor & Francis
    摘要: A new technology using the TiO2 photocatalysis combining electrodialysis was proposed for the simultaneous oxidization of ethylenediaminetetraacetic acid (EDTA)/reduction of hexavalent chromium (Cr(VI)) by electron–hole (e−–h+) pairs. The application of a cationic exchange membrane in this system was used to enhance the efficiency for the prevention of the recombination of electrons with the electron hole. The following parameters were studied: current density, pH, hydraulic detention time (HRT), EDTA/Cr(VI) molar ratio, and oxygen contents (aerated by argon, air, and oxygen). The result showed that the optimum removal efficiency was observed at 4.0 mA/cm2 and higher removal efficiencies were observed at a lower pH due to electrostatic attractions between the positively charged Ti–OH+2, and the negatively charged Cr(VI) and EDTA. A higher EDTA/Cr(VI) molar ratio enhanced the removal efficiency of Cr(VI) in the photocatalytic system, indicating that EDTA plays the role of a hole scavenger in the system. In addition, the removal efficiency of Cr(VI) was better for the system aerated with argon than those systems aerated with oxygen and air, since a lower direct oxygen or oxygen reduction potential (ORP) favors the reduction of Cr(VI). Moreover, an incomplete EDTA mineralization contributes to the occurrence of intermediates, including iminodiacetic acid, nitrilotriacetic acid, glyoxylic acid, glycine, oxalic acid, acetic acid, and formic acid, as identified by the GC/MS.
    關聯: Desalination and Water Treatment 51(1-3), pp.495-502
    DOI: 10.1080/19443994.2012.693651
    顯示於類別:[水資源及環境工程學系暨研究所] 期刊論文

    文件中的檔案:

    沒有與此文件相關的檔案.

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋