CLEAN UP OF MALACHITE GREEN DYE IN AQUEOUS SOLUTION USING ZnO NANOPOWDER

Abstract

Malachite green dye has been known to have toxic carcinogenic characteristics and potential health risks for humans even at low concentrations. Hence, it is very vital to remediate the dye before discharge into water bodies or water treatment systems. Thus, this article demonstrated the removal of cleanup of malachite green (MG)dye from the aquatic phase using ZnO nanopowder. In this work batch adsorption experiments were accomplished as a function of contact time, pH, and initial dye concentration to study the efficiency of ZnO nanopowder on dye removal (MG). The obtained nanopowder was characterized using various techniques XRD, FTIR, SEM and EDX. The results shown that the maximum absorbed value was 233.16 mg / g. The findings show that ZnO nanopowder have fast contact time and initial concentration absorbing characteristics in dye removal. The maximum capacity of sorbent was found to be 246.36 mg. Furthermore, the study revealed that ZnO nanopowder is an effective sorbent for cleanup of malachite green dye in aqueous solution when comparing with other adsorbent materials. The Adsorption and kinetics parameters of the maximum capacity of sorbent and correlation coefficient showed that the data were well fitted the to the Langmuir isotherm R2 of 0.923 models and pseudo-second-order kinetic model with R2 of 0.994 respectively.