Characteristics and Kinetics of Modified Corncob Adsorbing Reactive Brilliant Red K-2BP

A study was carried to explore characteristics of corncobs pretreated with ammonia, adsorbing reactive brilliant red K-2BP in wastewater. In the study structure of the modified corncob was characterized with the Fourier transform infrared spectroscopy (FTIR). Effects of pH, exposure duration, temperature and initial dye concentration on the corncob adsorbing the dye were determined and kinetics of the adsorption analyzed. Results show that the corncob displayed its optimal adsorption efficiency in wastewater 1.61 in pH and 30℃ in temperature for 10 hour, and reached up to 22.936 mg·g^-1 in saturated adsorption. Besides, its adsorption behavior fitted the Langmuir isotherm and the reaction order fitted the quasi-second order reaction kinetics, and activation energy being 17.655 kJ·mol^-1.