Removal of Acid red 18 from Water using Polyaniline/Wheat bran Composite

Abstract Background and Objective: Synthetic dyes are prevalent pollutants and one of the most resistant pollutants in the environment. Developing a simple and effective method to destroy non-biodegradable pollutants is one of the major challenges in environmental studies. The aim of this study is to evaluate the efficiency of the polyaniline/ wheat bran composite in the removal of acid red 18 dyes from aqueous solutions.Method: In this study, removal of acid red 18 from aqueous solution using wheat born loaded by polyaniline was investigated. For this purpose, composite synthesized through in-situ polymerization processes. Adsorption experiments were performed in batch system at laboratory scale .The effects of various parameters including the amount of adsorbent, pH, initial concentration, temperature, and contact time on adsorption were studied. Further kinetic and thermodynamic studies were performed on the data.Findings: The highest absorption rate by 0.1 g of adsorbent was equal to 100% at pH =2 of the solution after 2-hour contact with absorbent. The results show that the kinetic pseudo-second-order model fits the data. The experimental data were adjusted with Langmuir model.Discussion and Conclusion: According to the results, a simple, economical, and efficient method wasPresented to remove biodegradation-resistant pollutants using polyaniline/wheat bran composite.