Adsorption of Malachite Green Dye by Bio-micro-adsorbent from Aqueous Solution at Different Temperatures

Abstract

The objective of this study is to test the ability of algae bio adsorbent to absorb green malachite (MG) from aqueous solutions. The properties of the bioadsorbent surface have been diagnosed through several spectral techniques such as FTIR and SEM/EDX. The batch adsorption system was used to study the effect of both temperature and equilibrium time parameters on the adsorption capacity of the algal biomass. The percentage of adsorption of dye was obtained at a concentration of 80 mg L-1, biosorbent size 150 μm, 0.02 g dose, and 60 min of equilibrium time by Biomass reached to (100%). The adsorption kinetics were tested using several kinetics models. The results showed that malachite green adsorption by algae biomass follows pseudo-second order model with a high coefficient (R2=0.99). We conclude from this study that algal biomass is highly efficient in cationic dyes adsorption from aqueous solutions.