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【答案】应助回帖
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Mally89: 金币+1, 感谢应助！~欢迎常来！~吼吼！~\(^o^)/~ 2012-05-18 17:29:26
东坡小白: 金币+10, 翻译EPI+1, ★★★★★最佳答案, 评价晚了。。非常感谢你的帮助！！ 2012-05-20 23:00:19
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Carboxymethyl chitosan microspheres were prepared by using chitosan as the original material, glutaraldehyde as the cross-linking agent, and chloroacetic acid as the carboxymethylation substance. Then the microspheres were furtherly modified by molecular imprinting technology using Ni2+ ion as template, to obtain the imprinted modified carboxymethyl chitosan microspheres. The influence of nickel concentration, the glutaraldehyde dosage, and elution time on the imprinted cross-linked modification was investigated. The results showed that the best modified conditions were: 5g/L Ni2+ concentration, 20mL glutaraldehyde and 7h elution time. The best adsorption conditions，where the maximum adsorption of nickel by modified carboxymethyl chitosan microspheres occurred，were that：pH=8, adsorbent dosage was 60 mg, adsorption time was 80 min and adsorption temperature was 25℃. We also compared the adsorption effects between self - made imprinting modified carboxymethyl chitosan microspheres and chitosan by using Ni2+-containing wastewater, and the adsorption rates were 62.45% and 47.97% respectively, indicating that the adsorption properties of modified carboxymethyl chitosan microspheres have been greatly improved. |
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