Elimination of C.I. basic violet 16 from colored textile effluent using chitosan-ethyl acrylate as a bio-adsorbent

In this paper, chitosan (Ch) as a biopolymer is modified by Ethyl acrylate (Ea) and is utilized for dye removal from colored textile effluent containing of C.I. Basic Violet 16 (BV16). The achieved component was characterized by analyzing Fourier Transform Infra-Red spectroscopy (FTIR). The results confirmed that the spectroscopic data had a good relation to chemical structure of synthesized component. The consideration of dye removal properties of prepared adsorbent, the influence process variables such as pH, adsorbent dosage, dye concentration, temperature, contact time and inorganic salts were studied. It was found out that the dye removal increased by rising of pH; contact time and adsorbent dosage, whereas decreased by addition inorganic salts and increasing of the dye concentration. The obtained results showed that the capacity of the dye adsorption for BV16 onto modified chitosan increased. The pseudo-first order, pseudo-second order kinetic and intraparticle diffusion models were used to describing the kinetic data and finally, the experimental data fitted well to pseudo-second order kinetic model. Equilibrium isotherms were analyzed by Langmuir, Freundlich and Temkin adsorption models and the dye adsorption was correlated reasonably well by Langmuir isotherm. The results demonstrated that Ch-g-Ea could be employed as an affective biopolymer for removal of basic dyes from colored textile effluents.