Recent developments in hazardous pollutants removal from wastewater and water reuse within a circular economy

Abstract

Recent advances in wastewater treatment processes have resulted in high removal efficiencies for various hazardous pollutants. Nevertheless, some technologies are more suitable for targeting specific contaminants than others. We comprehensively reviewed the recent advances in removing hazardous pollutants from industrial wastewater through membrane technologies, adsorption, Fenton-based processes, advanced oxidation processes (AOP), and hybrid systems such as electrically-enhanced membrane bioreactors (eMBRs), and integrated eMBR-adsorption system. Each technology’s key features are compared, and recent modifications to the conventional treatment approaches and limitations of advanced treatment systems are highlighted. The removal of emerging contaminants such as pharmaceuticals from wastewater is also discussed.

Enhanced Visible-Light-Induced Photocatalytic Activity in M(III)Salophen-Decorated TiO2 Nanoparticles for Heterogeneous Degradation of Organic Dyes

“…Accordingly, in today’s scientific world, the removal of pollutants has easily become the center point of research efforts. Given the massive discharge of chemicals and subsequent pollution from various sources such as metallurgy, textile, paper, tannery, and paint industries, the conventional treatment is mostly ineffective and not environmentally compatible . In recent years, semiconductor-mediated photocatalysis as a cost-effective, environmentally friendly, and modern technology has grown rapidly for the degradation of effluents. , Among heterogeneous photocatalysts, titanium dioxide (TiO 2 ) as a promising semiconductor photocatalyst has been widely used in wastewater treatment because of its unique photoelectric properties, high chemical stability, low cost, and safety for both humans and the environment .…”

Outstanding Separation Performance of Oil-in-Water Emulsions with TiO2/CNT Nanocomposite-Modified PVDF Membranes

“…Beyond environmental protection reasons, economic concerns (such as increasing costs of processing water and wastewater discharge) also urge industries to use advanced wastewater treatment methods. Such methods could provide higher purification efficiency, the avoidance of penalties, or even the support of circular economies by water recirculation, which will inevitably be necessary as industrial water utilization is predicted to increase by 400% by 2050 [ 4 , 5 ].…”

Analytical and hybrid-neuro-differential approaches for describing contaminant removal from aqueous systems

“…Several technologies have been investigated for eliminating contaminants from wastewater such as photodegradation (Rueda-Márquez et al, 2020), cold plasma (Aggelopoulos, 2022), electrochemical oxidation (Qiao and Xiong, 2021), membrane distillation (Shirazi and Dumée, 2022), among others; however, the use of selective adsorber particles remains widespread because its relatively low cost, scale-up potential, excellent removal efficiency, high flexibility in operation, and no generation of additional pollutants (Zhang et al, 2021;Ahmed et al, 2022). Adsorbent materials can be chemically synthesized such as graphene oxide and nanostructured materials (Konicki et al, 2017;Zhang et al, 2021), isolated from natural sources such as zeolites, alginate, and chitosan (García-González et al, 2016;Ashrafi et al, 2021;Leo-Avelino et al, 2021), or obtained through functionalization of agricultural residues such as corncobes, plantain and prickly pear peels, oil palm bagasse, etc.…”