摘要
研究了交联壳聚糖的制备及对铅离子的吸附作用,探讨了反应时间、初始浓度、溶液的pH值、介质等因素对其吸附性能的影响.结果发现,其吸附量随反应时间、初始浓度、溶液的pH值、溶液中乙醇的含量的加大而增大,用t／Q对t作图,结果表明,交联壳聚糖对铅离子的吸附机理符合庄国顺等根据质量作用定律和单分子层吸附机理所提出的动力学方程:t／Qt=t／Qcp+M／Kcm(0).最大平衡吸附量为0.7 mmol/g.
Not only the preparation of crosslink chitosan was investigated, but also the effects of various factors on the adsorption of Pb( Ⅱ ) were discussed. The results showed that the adsorption capacity of Pb( Ⅱ)on crosslink chitosan increased with the reaction time, initial solution concentration, the pH value and the content of ethyl-alcohol. Using t/Q and t as two axes, the chart indicated that the adsorption behavior for Pb( Ⅱ ) on crosslink chitosan accorded with the dynamic equation. t/Qt = t/Qcp + M/Kcm(0), the greatest balance adsorption capacity is 0. 7 mmol/g.
基金
安徽省教育厅自然科学基金资助项目(2003kj008zd)
