Abstract
The crosslinked starch microspheres(CSM) were synthesized from soluble starch by inverse suspension polymerization with N,N′-methylenebisacrylamide as cross-linking agent. Experiments showed that adsorption isotherms of CSM for Cd(II) and Pb(II) could be described by Freundlich model, while that for Cu(II), Cr(III) fits well with Langmuir equation. The equilibrium capacity of Cu(II), Cr(III), Cd(II) and Pb(II) on the CSM were 1.10, 0.87, 0.35 and 0.31 mmol•g-1 respectively at 25°C, when adsorption process was undertaken with initial concentration from 0.7 to 11.5 mmol•L-1, and adsorption kinetics were examined according to the adsorption isotherm. Furthermore, the impact bring by other ions to CSM adsorption of Cu(II) were investigated in details.
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