A Review on Montmorillonite-Supported Nanoscale Zerovalent Iron for Contaminant Removal from Water and Soil

IF 2.8 4区 工程技术 Q2 CHEMISTRY, APPLIED Adsorption Science & Technology Pub Date : 2021-08-27 DOI:10.1155/2021/9340362
Yaru Yin, Wenjuan Zheng, A. Yan, Chenxi Zhang, Yuxuan Gou, Chongyang Shen
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引用次数: 6

Abstract

Nanoscale zerovalent iron (nZVI) has shown great promise for water treatment and soil remediation. However, the rapid aggregation of nZVIs significantly affects their mobility and reactivity, which considerably limits the practical applications. Montmorillonite- (Mt-) supported nZVI (Mt-nZVI) has received increasing attention for the past decade because it can prevent the aggregation of nZVI and incorporate the advantages of both nZVI and Mt in soil and water treatment. This work thus had a comprehensive review on the use of Mt-nZVI for soil and water treatment. We first summarized existing methods used to prepare Mt-nZVI, indicating the advantages of using Mt to support nZVI (e.g., increase of the dispersion and mobility of nZVI, reduction of the size and oxidation tendency of nZVI). We then presented the reaction mechanisms of Mt-nZVI for contaminant removal and evaluated the critical factors that influence the removal (e.g., pH, temperature, and dosage of the adsorbent). We further presented examples of applications of Mt-nZVI for the removal of typical contaminants such as heavy metals and organic compounds in soil and water. We finally discussed the limitations of the use of Mt-nZVI for water treatment and soil remediation and presented future directions for the application of nZVI technology for soil and water treatment.
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蒙脱石负载纳米零价铁去除水体和土壤污染物的研究进展
纳米零价铁(nZVI)在水处理和土壤修复方面具有广阔的应用前景。然而,nZVIs的快速聚集极大地影响了它们的迁移性和反应性,这极大地限制了它们的实际应用。蒙脱土(Mt-)支持的nZVI (Mt-nZVI)由于能够防止nZVI的聚集,并在土壤和水处理中结合了nZVI和Mt的优点,在过去的十年中越来越受到人们的关注。因此,本文对Mt-nZVI在土壤和水处理中的应用进行了全面的综述。我们首先总结了现有的Mt-nZVI的制备方法,指出了Mt支持nZVI的优点(例如,增加了nZVI的分散性和迁移率,降低了nZVI的尺寸和氧化倾向)。然后,我们介绍了Mt-nZVI去除污染物的反应机制,并评估了影响去除的关键因素(例如,pH、温度和吸附剂的剂量)。我们进一步介绍了Mt-nZVI在去除土壤和水中重金属和有机化合物等典型污染物方面的应用实例。最后讨论了Mt-nZVI用于水处理和土壤修复的局限性,并提出了nZVI技术在土壤和水处理中的未来应用方向。
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来源期刊
Adsorption Science & Technology
Adsorption Science & Technology 工程技术-工程:化工
CiteScore
5.00
自引率
10.30%
发文量
181
审稿时长
4.5 months
期刊介绍: Adsorption Science & Technology is a peer-reviewed, open access journal devoted to studies of adsorption and desorption phenomena, which publishes original research papers and critical review articles, with occasional special issues relating to particular topics and symposia.
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