Extraction of organic dyes by adsorption method using NiO-MgO nanoparticles

Abstract

In the present work,we are interested to the study of the adsorption of Malachite green, it is cationic dye .For this work we use catalyst NiO-MgO synthetised by two methods autocombustion and impregnation , calcinated at 700°C for 2h , characterizes by XRD and SEM analysis than applied on the elimination of Malachite green by adsorption process .The experimental results showed that the NiO-MgO prepared with autocombustion is more efficient in adsorption then NiO-MgO impregnation due to the IP due to the smallest crystallite size 8 nm compared to 28nm in case of NiO-MgO AT. The study of the influence of the pH dye, the initial concentration of pollutant and the adsorbent mass showed us that the optimal adsorption of malachite green is on this condition (C0 = 30 ppm, pH=10, T=25°C, m=0.04 g) after 55 min of reaction.