Adsorption kinetics based on the pseudo-second-order rate equation indicates that the rate-limiting step involves chemical reaction.
The Y-DMG sorbent shows good efficiency for the removal of nickel in the presence of different multivalent cations. The best removal efficiency was observed by Y-DMG at the following experimental conditions: Y-DMG dosage: 2 g L−1, CNi(II): 100 mg L−1 and contact time: 9 h. The effects of various parameters such as sorbent content, contact time, concentration of nickel solution, pH and selectivity were discussed.
Removal of Ni(II) by modified samples was investigated in batch procedure, and it was found that the modified zeolite Y has a very high capacity. Characterization studies indicate that the DMG molecules were loaded onto both the exterior surfaces and channels of the zeolite Y during the modification process.
Zeolite Y was obtained from diatomite in a template-free system, and the product was modified by dimethylglyoxime.
