Kinetics and Equilibrium Studies on Silica Supported Al-Zn Bimetals as Adsorbent for the Removal of Methylene Blue and Malachite Green Dyes from Aqueous Solution
Authors: Samaila MB, Aminu A, Lukman OA
Silica supported Al/Zn bimetals has been prepared successfully using millet husk ash and was subsequently used as adsorbent to remove methylene blue and malachite green from aqueous solution by batch adsorption technique. The material displayed very good adsorption properties that are consistent with some of the viable adsorbents reported in the literature. The amounts adsorbed in percentage at maximum concentration of 50 mg/L are 98.75% and 88.81% for methylene blue and malachite green respectively. The adsorption process followed pseudo-second order kinetics and interestingly, the adsorption data fitted both Langmuir and Freundlich models. Surprisingly, the prepared silica supported Al/Zn bimetals adsorbent has higher adsorption capacities for methylene blue than malachite green. Therefore, this material could be used as a cost-effective adsorbent in wastewater/effluents treatment.
Affiliations: Department of Pure and Industrial Chemistry, Umaru Musa Yar’adua University, PMB 2218, Katsina, Katsina State, Nigeria
Keywords: Bimetals, Adsorbents, Methylene Blue, Malachite Green, Millet Husk
Published date: 2019/12/30