Removal of Reactive Blue 221 dye by adsorption onto Crosslinked Chitosan Particles: Kinetic Studies

Abstract

The conlacl tiıne betweeıı Lhe pollutanl ancl the ,rclsorbenı is or signifıcant importance in the \•vasıewater treatınent by adsorption. A rapid uptake of polluıants and establishınent or equilibriuın in a short period signifies tlıe efficacy of ıhat adsorhent for its use in wastewater treatment. in this study. the adsorplion characıeristics of Reacıive Blue 221 (RB22 I) from aqueous solution oııto chiıosan parıiclcs crosslinked with glutaraldehyde lıavc hccıı iıı\'cstigatcc.l. Thc clkct oı· coııtacl tiıııc lcıı- thc adsmptioıı ur 1{13221 by tlıc clıiıos;ııı parıiclc ,,as sıııdicd ror a rcrind of 72 lı li.ır iııitial d) l' nıııccııtr;.ıtioııs or 60 nıg/1 m 2.5"C. /\dsorb,rnı dosagc ıHıs 0.1 gi50 nıl ol" dvc solution at pi 1 6. The adsorption capacities of the synthesized chitosaıı was 27.36 mg/g for dye RB22 I. Kinetics of adsorptioıı was deternıined by aııalyzing adsorptive uptake of the dye froın aqueous solution at different tiıne intervnls. in order ıo investigate the adsorption processes of RB'.221 on the chitosan particles. lour kinelic nıodcls were usecl. including pseudo-first­ordcr. pseuclo-second-order. l:3anghaın and iııtra-parıick cliffusion ınodcls. The pseudo­second-order kinetic ınodel provided the besı fit to the experiınental data for the adsorption of RB22 I textile dye. Ovcrnll. tlıis sıud) iııdicutcs tlıc clıitosaıı parıiclcs as an effrctİ\ c: adsorbcnr for thc reınoval of Rcnctivc 131uc 221 dye rroın Lhe aqueous solutioııs.