Decolorization of malachite green in aqueous solution via MgO nanopowder

Abstract

Water is one of the essential primary resources for life and development on the planet, where many industrial activities depend on it, but some industries lead to water pollution. Hence, we need economical and effective ways to address the contamination. This article describes the production and utilization of MgO nanopowder using thermal decomposition as an economical and efficient method for malachite green decolorization. The MgO nanopowder was analyzed via various techniques for morphology, cryptography, surface area, etc. Batch adsorption tests have been performed as a function of contact time, pH, and initial dye concentration to study their impact on decolorization of malachite green via MgO nanopowder. The result verified the target nanopowder's production with crystallite size 20.16 nm and a relative surface area of 19.84 m2 /g. MgO nanopowder was employed to decolorize malachite green dye in an aquatic solution utilizing a batch method. The findings revealed that the maximum adsorption capacity value was 232.26 mg/g. The adsorption was found to follow the Freundlich isotherm models and follow the pseudo-second-order kinetics