Preparation of a novel chelating resin for the removal of Ni2+ from water

A new chelating resin DVB-MA-HDA modified with hydroxamic acid groups was prepared for the fast removal of Ni2+ from water. SEM, BET, elemental analysis, FT-IR spectroscopy and XPS were used to characterize this new adsorbent. Batch adsorption experiment indicated that the equilibrium adsorption capacity of DVB-MA-HD for Ni2+ was more than 130 mg/g, and the adsorption isotherm can be well fitted by the Langmuir model. The adsorption kinetic curve indicates that more than 60% of the adsorption amount of Ni2+ at equilibrium occurred within the initial 20 min. 0.1 mol/L EDTA solution could desorb Ni2+ from DVB-MA-HDA effectively.

The XPS spectrogram peak at 855.8 eV indicates that the ‘Ni’ is chelated by an ‘O’, which suggests the adsorption mechanism of the Ni2+ by DVB-MA-HDA is chelating interaction.Figure optionsDownload as PowerPoint slide