Enhanced chromium(VI) removal by zero-valent iron in the presence of anions and a weak magnetic field: Batch and column tests
Enhanced chromium(VI) removal by zero-valent iron in the presence of anions and a weak magnetic field: Batch and column tests
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在阴离子和弱磁场存在的情况下，通过零价铁增强六价铬的去除：批量和柱测试
DOI：
10.1016/j.cej.2018.08.047
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发表时间：
2018-12
影响因子：
15.1
通讯作者：
Guan XH
中科院分区：
文献类型：
--
作者：
Sun Yuankui;Song Yadan;Qiao Junlian;Guan Xiaohong;Sun Yuankui;Song Yadan;Qiao Junlian;Guan Xiaohong;Pan Bingcai;Zhang Weiming;Guan XH
在这项研究中，批和柱测试进行了评估选定的阴离子（ClO 4-，NO3-，Cl-和SO 42-）的影响，通过零价铁（ZVI）去除铬（VI）和无弱磁场（WMF）。批式动力学实验表明，WMF和每种阴离子对Cr（VI）去除的协同增强效应。此外，每种测试阴离子的Cr（VI）去除速率常数与去离子水的去除速率常数之比（即，组合效应的促进因子）表现出作为阴离子浓度的函数的双曲线增加。根据其增强效应的大小，阴离子从最大到最小排列为：SO 42 −> Cl−> ClO 4 −> NO3−。在连续流系统中，WMF和阴离子的协同作用也很明显，可以显著延长ZVI系统的使用寿命，提高Cr（VI）的去除效率。通过扫描电镜和X射线衍射分析研究了WMF和测试阴离子对ZVI腐蚀产物的影响。这些发现可以鼓励ZVI/WMF技术在该领域的应用。
In this study, batch and column tests were conducted to evaluate the influence of selected anions (ClO4−, NO3−, Cl−and SO42−) on Cr(VI) removal by zero-valent iron (ZVI) with and without a weak magnetic field (WMF). Batch kinetic experiments demonstrated a synergetic enhancing effect of WMF and each anion on Cr(VI) removal. In addition, the ratio of the Cr(VI) removal rate constant for each tested anion to that of deionized water (i.e., the promotion factor of the combined effect) exhibited a hyperbolic increase as a function of anion concentration. Based on the magnitudes of their enhancing effects, the anions were ranked from most to least enhancing: SO42−> Cl−> ClO4−> NO3−. The synergetic effect of WMF and anions was also obvious in a continuous flow system, which could both dramatically extend the lifespan of ZVI systems and improve the efficiency of Cr(VI) removal. The influence of WMF and the tested anions on ZVI corrosion products was investigated by scanning electron microscopy and X-ray diffraction. These findings could encourage the application of ZVI/WMF technology in the field.
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影响因子：
--
作者：
Alvarado, Jorge S.;Rose, Candace;LaFreniere, Lorraine
通讯作者：
LaFreniere, Lorraine
影响因子：
8.7
作者：
S. Bilardi;P. Calabrò;S. Caré;N. Moraci;C. Noubactep
通讯作者：
S. Bilardi;P. Calabrò;S. Caré;N. Moraci;C. Noubactep
影响因子：
8.8
作者：
Klausen, J;Ranke, J;Schwarzenbach, RP
通讯作者：
Schwarzenbach, RP
影响因子：
2.2
作者：
P. Westerhoff
通讯作者：
P. Westerhoff
影响因子：
3.6
作者：
P. Vikesland;J. Klausen;H. Zimmermann;A. L. Roberts;W. P. Ball
通讯作者：
P. Vikesland;J. Klausen;H. Zimmermann;A. L. Roberts;W. P. Ball