Rapid and long-effective removal of broad-spectrum pollutants from aqueous system by ZVI/oxidants
Rapid and long-effective removal of broad-spectrum pollutants from aqueous system by ZVI/oxidants
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ZVI/氧化剂快速、长效去除水体系统中的广谱污染物
DOI：
10.1007/s11783-020-1268-3
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发表时间：
2020-08
影响因子：
6.4
通讯作者：
Faiz Palwasha
中科院分区：
文献类型：
--
作者：
Ullah Sana;Guo Xuejun;Luo Xiaoyan;Zhang Xiangyuan;Leng Siwen;Ma Na;Faiz Palwasha
零价铁（ZVI）技术最近在有效隔离各种污染物方面获得了极大的兴趣。然而，由于ZVI固有的钝化层，其表面钝化会导致ZVI的反应性较差，去除污染物的效率较低。因此，廉价、连续、高效地活化零价铁表面是零价铁技术在大规模应用前必须克服的一个重要挑战。迄今为止，已经广泛应用了几种物理和化学方法来增加ZVI表面对消除广谱污染物的反应性。然而，这些技术具有几个局限性，例如效率低、工作pH窄、生态毒性和安装成本高。这篇小型综述论文的目的是确定氧在确定ZVI对污染物去除的反应性中的关键作用。随后，三种典型的氧化剂（H2 O2，KMnO 4，和NaClO）的影响，广谱污染物去除ZVI已被记录和讨论。对ZVI/氧化剂体系的反应机理和螯合效果进行了评价和评述。ZVI/氧化剂方法的技术基础是基于氧化剂阴极还原的半反应。水处理工业中常用的氧化剂，即，NaClO、O_3、H_2O_2可作为理想的偶联电子受体。在这些氧化剂的组合下，可以持续驱动ZVI的表面腐蚀。将ZVI/氧化剂技术与其它常规技术进行了比较，并得出了结论。
Zero-valent iron (ZVI) technology has recently gained significant interest in the efficient sequestration of a wide variety of contaminants. However, surface passivation of ZVI because of its intrinsic passive layer would lead to the inferior reactivity of ZVI and its lower efficacy in contaminant removal. Therefore, to activate the ZVI surface cheaply, continuously, and efficiently is an important challenge that ZVI technology must overcome before its wide-scale application. To date, several physical and chemical approaches have been extensively applied to increase the reactivity of the ZVI surface toward the elimination of broad-spectrum pollutants. Nevertheless, these techniques have several limitations such as low efficacy, narrow working pH, eco-toxicity, and high installation cost. The objective of this mini-review paper is to identify the critical role of oxygen in determining the reactivity of ZVI toward contaminant removal. Subsequently, the effect of three typical oxidants (H2O2, KMnO4, and NaClO) on broad-spectrum contaminants removal by ZVI has been documented and discussed. The reaction mechanism and sequestration efficacies of the ZVI/oxidant system were evaluated and reviewed. The technical basis of the ZVI/oxidant approach is based on the half-reaction of the cathodic reduction of the oxidants. The oxidants commonly used in the water treatment industry, i.e., NaClO, O3, and H2O2, can be served as an ideal coupling electron receptor. With the combination of these oxidants, the surface corrosion of ZVI can be continuously driven. The ZVI/oxidants technology has been compared with other conventional technologies and conclusions have been drawn.
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与次氯酸盐 (ZVI/NaClO) 结合，快速、长效地去除铁中的磷酸盐
影响因子：
15.1
作者：
Luo Xiaoyan;Guo Xuejun;Xia Xinghui;Zhang Xiangyuan;Ma Na;Leng Siwen;Ullah Sana;Ayalew Zinashbizu Mengesha
通讯作者：
Ayalew Zinashbizu Mengesha
影响因子：
11.4
作者：
Christopher G. Weisener;K. Scott Sale;David J. A. Smyth;D. Blowes
通讯作者：
Christopher G. Weisener;K. Scott Sale;David J. A. Smyth;D. Blowes
影响因子：
12.8
作者：
Huang, YH;Zhang, TC
通讯作者：
Zhang, TC
影响因子：
6.6
作者：
A. Simões;J. Fernandes
通讯作者：
A. Simões;J. Fernandes
影响因子：
11.4
作者：
Ibettina Flury;Jakob Frommer;U. Eggenberger;U. Mäder;M. Nachtegaal;R. Kretzschmar
通讯作者：
Ibettina Flury;Jakob Frommer;U. Eggenberger;U. Mäder;M. Nachtegaal;R. Kretzschmar