Abstract
AbstractPhysical and chemical methods have been developed for water and wastewater treatments. Adsorption is an attractive method due to its simplicity and low cost, and it has been widely employed in industrial treatment. In advanced schemes, chemical oxidation and photocatalytic oxidation have been recognized as effective methods for wastewater-containing organic compounds. The use of magnetic iron oxide in these methods has received much attention. Magnetic iron oxide nanocomposite adsorbents have been recognized as favorable materials due to their stability, high adsorption capacities, and recoverability, compared to conventional sorbents. Magnetic iron oxide nanocomposites have also been reported to be effective in photocatalytic and chemical oxidation processes. The current review has presented recent developments in techniques using magnetic iron oxide nanocomposites for water treatment applications. The review highlights the synthesis method and compares modifications for adsorbent, photocatalytic oxidation, and chemical oxidation processes. Future prospects for the use of nanocomposites have been presented.
Highlights
Water treatment has continued to be a required technology in many industries, because water contamination and pollution have become major environmental problems worldwide
To understand variability in nanocomposite formation and the implications for the use of nanocomposites as engineered materials, this review has presented an overview of our present knowledge regarding the influence of source material, synthesis method, and parameters in production technologies on magnetic iron oxide/clay nanocomposites (MICNCs)
This different structure means that Magnetic iron oxide nanoparticles (MNPs)/kaolinite materials are mainly prepared using the co-precipitation method, which is used in the production of halloysite, pristine halloysite, and halloysite nanotubes (HNTs), which are within the kaolin–serpentine class of clay
Summary
Water treatment has continued to be a required technology in many industries, because water contamination and pollution have become major environmental problems worldwide This has created a great demand for an effective water treatment technology, and adsorption and photocatalysis are the most popular techniques due to their ease of handling. Especially iron oxide nanoparticles, have been known since ancient times to have characteristic properties for specified applications, including for water treatment [1]. Magnetic iron oxide nanoparticles (MNPs) may be good candidates for use in the development of highcapacity adsorbents and photocatalysts. With their saturation magnetization, magnetic iron oxide-based nanocomposites provide a cost-effective approach for adsorption and photocatalysis through their reusability. Understand variability in nanocomposite formation and the implications for the use of nanocomposites as engineered materials, this review has presented an overview of our present knowledge regarding the influence of source material, synthesis method, and parameters in production technologies on MICNCs
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