Insight into the Oxidant Agents Effect of Removal and Photo-decolorization of Vitamin B12 Solution in Drug Tablets using ZrO2

Abstract

The purpose of this manuscript was to remove and decolorize vitamin B₁₂ from an aqueous solution of drug tablets using ZrO₂ as an environmentally friendly method via advanced oxidation processes. Some oxidant agents such as Fe²⁺, H₂O_2, K₂S₂O₈ and their mixture of were performed, and the best adsorption sequences have occurred with increased adsorption capacity: q(K₂S₂O₈ + H₂O₂)>q(H₂O₂) >q (K₂S₂O₈) >q (Fe²⁺ + H₂O₂) >q (Fe²⁺)>q (without) Endothermic and physical adsorption occurred of this vitamin on the ZrO₂ surface with and without the addition of K₂S₂O₈ +H₂O₂. On the other side, the photoreaction for this vitamin with and without the addition of K₂S₂O₈ +H₂O₂ was found to be quick, endothermic, less random, and spontaneous. At 15 min, 33.223 % and 98. 684% were calculated as the maximum percentage of removal in the dark reaction and the maximum decolorization in the photocatalytic reaction respectively.