ZnO-based nanocomposites for removal of lead (Pb2+) from water/wastewater: a review
ISSN: 0369-9420
Article publication date: 2 March 2022
Issue publication date: 1 June 2023
Abstract
Purpose
This paper aims to investigation of processes for Pb2+ elimination from water/wastewater as a significant public health issue in many parts of world. The removal of Pb2+ ions by various nanocomposites has been explained from water/wastewaters. ZnO-based nanocomposites, as eco-friendly nanoparticles with unique physicochemical properties, have received increased attention to remove Pb2+ ions from water/wastewaters.
Design/methodology/approach
In this review, different ZnO-based nanocomposites were reviewed for their application in the removal of Pb2+ ions from the aqueous solution, typically for wastewater treatment using methodology, such as adsorption. This review focused on the ZnO-based nanocomposites for removing Pb2+ ions from water and wastewaters systems.
Findings
The ZnO-based nanocomposite was prepared by different methods, such as electrospinning, hydrothermal/alkali hydrothermal, direct precipitation and polymerization. Depending on the preparation method, various types of ZnO-based nanocomposites like ZnO-metal (Cu/ZnO, ZnO/ZnS, ZnO/Fe), ZnO-nonmetal (PVA/ZnO, Talc/ZnO) and ZnO-metal/nonmetal (ZnO/Na-Y zeolite) were obtained with different morphologies. The effects of operational parameters and adsorption mechanisms were discussed in the review.
Research limitations/implications
The findings may be greatly useful in the application of the ZnO-based nanocomposite in the fields of organic and inorganic pollutants adsorption.
Practical implications
The present study is novel, because it investigated the morphological and structural properties of the synthesized ZnO-based nanocomposite using different methods and studied the capability of green-synthesized ZnO-based nanocomposite to remove Pb2+ ions as water contaminants.
Social implications
The current review can be used for the development of environmental pollution control measures.
Originality/value
This paper reviews the rapidly developing field of nanocomposite technology.
Keywords
Acknowledgements
The present study was adapted from the Ph.D. thesis of Maryam Khashij at Shahid Sadoughi University of Medical Sciences. The authors wish to acknowledge the support received (Code: 6082) from Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Citation
Khashij, M., Salmani, M.H., Dalvand, A., Fallahzadeh, H., Haghirosadat, F. and Mokhtari, M. (2023), "ZnO-based nanocomposites for removal of lead (Pb2+) from water/wastewater: a review", Pigment & Resin Technology, Vol. 52 No. 4, pp. 456-469. https://doi.org/10.1108/PRT-01-2022-0003
Publisher
:Emerald Publishing Limited
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