分子印迹强化胺化改性壳聚糖吸附Cd2+性能研究

摘要

利用分子印迹强化胺化技术制备Cd2+模板改性壳聚糖P（Cdb2+）－C－CTS（Cda2+），研究了吸附剂中Cd2+模板含量对其吸附水中Cd2+的性能及含水率的影响。吸附容量随着a值和b值的增加而升高，当a为0．45、b为0．40时，吸附容量达到最大值。以P（Cd0．402+）－C－CTS（Cd02+．45）为研究对象，考察了pH对Cd2+吸附容量的影响，并对吸附选择性能进行研究。结果表明，分子印迹强化胺化技术可制备得到吸附效率更高、选择性更好的改性壳聚糖吸附剂。%M olecular imprinted enhancement and amination technique has been used for preparing Cd2+-templet modified chitosan P(Cdb2+)-C-CTS(Cda2+). The influences of Cd2+-templet contents in the adsorbent on the adsorpt-ion capacity for Cd2+ in water and its water content are studied. The adsorption capacity increases with the increase of a value and b value. When a is 0.45 and b is 0.40,the adsorption capacity reaches the max. Taking P (Cd0.402+ )-C-CTS(Cd0.452+ ) as the research subject,the influences of pH on the adsorption capacity for Cd2+are investigated,and its adsorption selectivity is studied,as well. The results show that modified chitosan adsorbent having higher adsorbing efficiency and better selectivity can be prepared and obtained by molecular imprinted enhancement and amination method.