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Nanoadsorbants for the Removal of Heavy Metals from Contaminated Water: Current Scenario and Future Directions

Institute of Technology, Estonian University of Life Sciences, Kreutzwaldi 56/1, 51014 Tartu, Estonia
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Academic Editors: Monika Wawrzkiewicz and Anna Wołowicz
Processes 2021, 9(8), 1379; https://doi.org/10.3390/pr9081379
Received: 18 June 2021 / Revised: 29 July 2021 / Accepted: 30 July 2021 / Published: 6 August 2021
(This article belongs to the Special Issue Various Adsorbents for Water Purification Processes)
Heavy metal pollution of aquatic media has grown significantly over the past few decades. Therefore, a number of physical, chemical, biological, and electrochemical technologies are being employed to tackle this problem. However, they possess various inescapable shortcomings curbing their utilization at a commercial scale. In this regard, nanotechnology has provided efficient and cost-effective solutions for the extraction of heavy metals from water. This review will provide a detailed overview on the efficiency and applicability of various adsorbents, i.e., carbon nanotubes, graphene, silica, zero-valent iron, and magnetic nanoparticles for scavenging metallic ions. These nanoparticles exhibit potential to be used in extracting a variety of toxic metals. Recently, nanomaterial-assisted bioelectrochemical removal of heavy metals has also emerged. To that end, various nanoparticle-based electrodes are being developed, offering more efficient, cost-effective, ecofriendly, and sustainable options. In addition, the promising perspectives of nanomaterials in environmental applications are also discussed in this paper and potential directions for future works are suggested. View Full-Text
Keywords: nanomaterials; heavy metals; remediation; bioelectrochemical systems; wastewater; adsorption; nanocomposites nanomaterials; heavy metals; remediation; bioelectrochemical systems; wastewater; adsorption; nanocomposites
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MDPI and ACS Style

Kumar, R.; Rauwel, P.; Rauwel, E. Nanoadsorbants for the Removal of Heavy Metals from Contaminated Water: Current Scenario and Future Directions. Processes 2021, 9, 1379. https://doi.org/10.3390/pr9081379

AMA Style

Kumar R, Rauwel P, Rauwel E. Nanoadsorbants for the Removal of Heavy Metals from Contaminated Water: Current Scenario and Future Directions. Processes. 2021; 9(8):1379. https://doi.org/10.3390/pr9081379

Chicago/Turabian Style

Kumar, Rohit, Protima Rauwel, and Erwan Rauwel. 2021. "Nanoadsorbants for the Removal of Heavy Metals from Contaminated Water: Current Scenario and Future Directions" Processes 9, no. 8: 1379. https://doi.org/10.3390/pr9081379

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