Potentiality of using Synthesised Zinc Tungstate Nanoparticles for Thoron and Arsenazo III Removal from Waste Solutions.

Environmentally, removing organic pollutants from industrial waste solutions is important. In this study, the potentiality of removing Thoron (TH) and Arsenazo III (ARZIII) pollutants was investigated using chemically stable zinc tungstate nanoparticles (ZW-NPs). The preparation of ZW-NPs was performed using an eco-friendly solvo/hydrothermal technique as a sorbent. Complete characterisation of ZW-NPs before and after the adsorption processes was performed using XRD, FT-IR, EDX, DLS, and TEM analysis. The nanostructure of the zinc tungstate and the incidence of adsorption upon the ZW-NPs were effectively demonstrated. The maximum uptakes of TH and ARZIII contaminants on the ZW-NPs sorbent were 86.3 and 94.7 mg/g respectively. These uptakes were accomplished under optimum pH of 4.0 and 5 for TH and ARZIII, respectively. The adsorption outcomes were studied using Langmuir, Freundlich, and Dubinin–Radushkevich isotherm models. Modelling results indicated that the adsorption followed a pseudo-2nd-order interaction. The adsorption isotherms and thermodynamic results demonstrated the endothermic and chemisorption behaviour. Approximately, TH and ARZIII were completely removed from the laboratory waste solutions on the studied sorbent using optimal adsorption conditions. [ABSTRACT FROM AUTHOR]