Abstract：A sort of cheap sorbent was prepared through modifying organobentonite with dimethylglyoxime (DMG). The adsorption behavior of the modified organobentonite with DMG for nickel ion in water was investigated. The nickel ion in water could be adsorbed on the DMG modified organobentonite. The adsorption quantity was affected by the pH value of medium, temperature and time. The adsorption behavior followed Langmuir adsorption isotherm and pseudo-second-order kinetic model. The enthalpy changes (△H) of the adsorption process was 58.759 kJ/mol. At various temperatures, Gibbs free energy changes (△G) were negative, and entropy changes (△S) were positive. The reaction of adsorption was an endothermal and spontaneous process. The nickel ion adsorbed on the sorbent could be completely eluated by using 0.1mol/L HNO3.
