Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/27683
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 17482/19768 (88%)
造访人次 : 6325254      在线人数 : 298
RC Version 7.0 © 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


    標題: Background species effect on aqueous arsenic removal by nano zero-valent iron using fractional factorial design
    作者: Tanboonchuy, Visanu
    Grisdanurak, Nurak
    Liao, Chih-Hsiang
    貢獻者: 環境資源管理系
    關鍵字: Arsenic
    Zero-Valent Iron
    日期: 2012-02-29
    上傳時間: 2014-03-21 16:17:33 (UTC+8)
    出版者: Elsevier Science Bv
    摘要: This study describes the removal of arsenic species in groundwater by nano zero-valent iron process, including As(III) and As(V). Since the background species may inhibit or promote arsenic removal. The influence of several common ions such as phosphate (PO43-), bicarbonate (HCO3-), sulfate (SO42-), calcium (Ca2+), chloride (Cl-), and humic acid (HA) were selected to evaluate their effects on arsenic removal. In particular, a 2(6-2) fractional factorial design (FFD) was employed to identify major or interacting factors, which affect arsenic removal in a significant way. As a result of FFD evaluation, PO43- and HA play the role of inhibiting arsenic removal, while Ca2+ was observed to play the promoting one. As for HCO3- and Cl-, the former one inhibits As(III) removal, whereas the later one enhances its removal; on the other hand, As(V) removal was affected only slightly in the presence of HCO3- or Cl. Hence, it was suggested that the arsenic removal by the nanoiron process can be improved through pretreatment of PO43- and HA. In addition, for the groundwater with high hardness, the nanoiron process can be an advantageous option because of enhancing characteristics of Ca2+. (C) 2011 Elsevier B.V. All rights reserved.
    關聯: Journal Of Hazardous Materials, 205-206, 40-46
    显示于类别:[環境資源管理系(所)] 期刊論文


    档案 描述 大小格式浏览次数

    在CNU IR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