Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

Abstract

The rapid urbanization and industrialization is causing worldwide water pollution, calling for advanced cleaning methods. For instance, pollutant adsorption on magnetic oxides is efficient and very practical due to the easy separation from solutions by an magnetic field. Here we review the synthesis and performance of magnetic oxides such as iron oxides, spinel ferrites, and perovskite oxides for water remediation. We present structural, optical, and magnetic properties. Magnetic oxides are also promising photocatalysts for the degradation of organic pollutants. Antimicrobial activities and adsorption of heavy metals and radionucleides are also discussed.

Mycosynthesis of Hematite (α-Fe2O3) Nanoparticles Using Aspergillus niger and Their Antimicrobial and Photocatalytic Activities

“…The inconsistency in these results might be due to a particle size variance. It is well founded that the SPR bands are very susceptible and highly dependent on the nanoparticles size, shape, FeSO 4 ·7H 2 O concentration and the type of substrates presented in the biological extract [ 63 ].…”

Synthesis of a novel perovskite-carbon aerogel hybrid adsorbent with multiple metal-Lewis active sites for the removal of dyes from water: experimental and DFT studies

“…Researchers reported the broad applicability of perovskite nanomaterials from catalysis to the adsorption process due to their excellent optical, magnetic, thermal, and electric characteristics. 8,9 The high adsorption capacity and fast kinetics of perovskites make them suitable adsorbent candidates in industrial wastewater bearing high levels of organic dyes. [10][11][12] For instance, Cuijin Pei et al 2016 showed a remarkable adsorption capacity (7154 mg g À1 in 40 min) for Acid Fuschia (AF) using a 3-dimensional hierarchical ZnO adsorbent.…”

“…Several researchers reported that these perovskite nanomaterials could be used in many applications from catalysis to adsorption process due to good optical, magnetic, thermal, and electric characteristics. 8,9,14 Several synthetic methods have been reported for preparing perovskites that included sol-gel, Pechini, co-precipitation, chelating complex, and pyrolysis. [15][16][17][18] The perovskites exhibit not only higher adsorption capacity and fast kinetics but also act as suitable adsorbents toward industrial wastewater with high concentration.…”

Remediation of pharmaceuticals from contaminated water by molecularly imprinted polymers: a review

“…In water pollution control and wastewater management, the adsorption process is a promising method because it has design and operational simplicity, higher efficacy, lower maintenance, and no undesirable byproducts (de Andrade et al 2018 ; Wang et al 2022 ; Zare et al 2021 ; Maksoud et al 2022 ). The non-conventional adsorption approach based on molecularly imprinted polymers offers a valid technology for the selective removal of specific target pollutants in (waste)water treatment.…”