Modeling and optimization of Tylosin adsorption using dehydrated wheat bran: adsorption behaviors, kinetic and thermodynamic studies

• Published in: Reaction kinetics, mechanisms and catalysis Vol. 135; no. 4; pp. 1905 - 1928
• Main Authors: Sarrai, Abd Elaziz, Belaissa, Yahia, Kirdi, Rachida, Hanini, Salah, Szabó, Tibor, Nagy, László
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.08.2022
• Subjects: Catalysis; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Physical Chemistry; Dehydrated wheat bran; Kinetic model; Tylosin; Response surface methodology; Adsorption
• ISSN: 1878-5190; 1878-5204
• DOI: 10.1007/s11144-022-02241-7

Dehydrated wheat bran (DWB) prepared from wheat bran, has been used as adsorbent for Tylosin removal from aqueous solution. DWB was characterized by Fourier transform infra-Red (FT-IR), scanning electron microscopy and energy dispersive X-ray analysis (EDX). The response surface methodology (RSM) based on central composite design (CCD) was used to evaluate and optimize the effect of four parameters, including pH, DWB concentration, Tylosin (TYL) initial concentration and time of adsorption as independent variables on the adsorption removal efficiency (R %) as the response function. The optimal interaction parameters and conditions were obtained by using the MODDE 06 ® software. The optimal values of the operation parameters under the related constraint conditions were found at pH 5.05, DWB concentration of 0.86 g L −1 , TYL initial concentration of 14.27 mg L −1 , in a period time of 111 min, respectively. Under the optimized conditions, the removal efficiency of TYL approached 93.1%. Adsorption isotherm was used to interpret the process of TYL adsorption on DWB, Timken and Langmuir models were the most accurate to fit experimental data. The pseudo-first-order and pseudo-second-order kinetic models were applied to test the experimental data. The pseudo-second-order kinetic model provided the best fitting to the experimental data. The mechanism of the adsorption process was determined from the intraparticle diffusion model. The thermodynamic parameters as Δ H ° and Δ S ° were calculated and the adsorption process was found to be spontaneous and exothermic.