Removal of basic red 46 from the aqueous solution by using modified sugar beet bagasse with formaldehyde in batch system

In this study, firstly, sugar beet bagasse (ŞPK) was treated with sodium hydroxide solution andsecondly, saponified sugar beet bagasse obtained from first stage was modified with formaldehyde. Themodified product from sugar beet bagasse with formaldehyde (ŞPKF) was used for removal of basic red46 (BK46) from aqueous solution. The effective dose for removal was found to be 2 g/L. At 25 °C, 100mL of 0.5 mM concentration solution of BK46 with 2 g/L of ŞPKF was contacted in batch containersfor 360 minutes and it was determined that 80.8% of BK46 was removed under these conditions. Furthermore, the effects of pH and sorbent dose on removal of BK46 were investigated. Thesorption capacities data that obtained against time were applied pseudo-first-order, pseudo-second- order, Elovich, intra-particle diffusion, modified Freundlich ve Banghman kinetic models and the bestkinetic model for BK46 removal was determined to be the pseudo second order kinetic model. TheBK46 solutions that a range from 0.10 mmol/L to 2.50 mmol/L of initial concentration were contactedwith 2 g/L dose of sorbent and equilibrium data were obtained. These equilibrium data were analyzedby using Langmuir, Freundlich, Dubinin-Radushkevich, Frumkin, Temkin ve Elovich isotherms and itwas determined that best-fit models for data are Langmuir and Dubinin-Radushkevich isotherms