Optimization of effective parameters in the biosorption of Cr(VI) using acid treated date palm fiber from aqueous solution

Abstract

The study tries to determine the optimal condition to achieve the maximum Cr(VI) removal in the biosorption process from aqueous solution using acid-treated date palm fiber as the biosorbent. Three factors including initial pH, initial Cr(VI) concentration, and biosorbent dosage were optimized using response surface methodology. Maximum Cr(VI) removal was 95% at the optimum condition of initial pH 3.3, initial Cr(VI) concentration 180 (mg/L), and biosorbent dosage of 0.8% (w/v). The kinetic study was done to acquire a deeper understanding of the mechanism of biosorption process and its results showed that the pseudo-second-order models controlled the process. Isotherm study showed that Langmuir model described the experimental data thoroughly.

Keywords:

• Date palm
• Cr(VI)
• Response surface methodology
• Kinetic
• Isotherm