Improvement of cadmium ion removal by base treatment of juniper fiber

摘要: Juniper is a small-diameter underutilized lignocellulosic material. We evaluated the efficacy of base-treated juniper fiber (BTJF) for cadmium (Cd2+) sorption and viability as sorbent removing Cd2+ from water. Fourier transform infrared spectroscopy analysis indicated that carboxylate ion major functional group responsible sorption. The apparent ideal sodium hydroxide concentration base treatment approximately 0.5M. A batch isotherm test showed equilibrium data were better represented by Langmuir model than Freundlich model. After treatment, maximum loading, Qmax, was greatly improved (9.18-29.54 mg/g), despite decrease in specific surface area. pseudo-second-order kinetic fitted well onto BTJF. Initial metal alkalinity found to be parameters influencing kinetics reaction. As result its strong ability bind faster low concentration, BTJF could an inexpensive efficient heavy metals stormwater runoff.