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| Thesis Name： |
Adsorption behaviors of copper (II) and lead (II) ions by crosslinked starch graft copolymer with aminoethyl group |
| Usage： |
Chemistry and Environmental Science |
| Keyword： |
Adsorption; Heavy metal ions; Starch graft copolymer; Wastewater treatment |
| Remarks： |
Abstract:
An investigation was undertaken regarding the adsorption behaviors of copper (II) and lead (II) ions from aqueous solutions by crosslinked starch graft copolymers with aminoethyl groups, which were synthesized by grafting 2-aminoethyl methacrylate onto crosslinked starch. The dynamic adsorption method was utilized to evaluate adsorbability of graft copolymer under various parameters such as metal ion concentration, adsorption time, grafting percentage and adsorption temperature. The adsorption time reaching equilibrium for Cu (II) and Pb (II) was found to be two hours and one hour, respectively. The adsorption capacity increases with the increasing graft percentage and metal ions concentration. For the starch graft copolymer with grafting percentage of 75.5%, when the metal ions concentration was about 5.0 mmol/L, the saturation adsorption capacity of Cu (II) and Pb (II) are 21.05 mg/g and 144.08 mg/g (dry weight), respectively, and its desorption percentage is about 95%.
Deng Kuilin, Jia Na, Zhang Yaqin, Yan Dawei, Hou Duanmin
(College of Chemistry and Environmental Science, Hebei University, Baoding, 071002) |
| Original file： |
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