采用表面印迹技术和溶胶-凝胶法,以Cd（Ⅱ）离子作为印迹离子,硫氰基丙基三甲氧基硅烷为功能分子,环氧氯丙烷为交联剂,在硅胶表面制备Cd（Ⅱ）离子印迹聚合物（IIP-TCPTS/SiO2）,并利用平衡吸附法研究了聚合物吸附性能和选择识别能力。结果表明,最大吸附量为16.7 mg/g;20 min即可达到吸附平衡;当pH值在5.4-7.8范围内,印迹聚合物保持了较好的吸附容量;印迹聚合物对Cd（Ⅱ）离子具有较强的选择性识别能力;重复使用时性能稳定。
A ion-imprinted thiocyanato-functionalized silica gel sorbent was synthesized by the combination of surface imprinting technique with sol-gel process with Cd（ II ） as the template, 3-thiocyanatopropyltriethoxysilane as the functional monomer, and epichlorohydrin as the cross-linking agent for selective removal of Cd（II） from aqueous solution. The Cd（II）-imprinted thiocyanato -functionalized silica sorbent was characterized by FT-IR, SEM and the static adsorption-desorption experiment method. The results show that the imprinted sorbent offers a fast kinetics for the adsorption and desorption of Ccl（II）, has a substantial binding capacity in the range of pH 5.4--7.8 and can be used repeatedly. The static uptake capacity is 16.7 mg/g. The selectivity coefficient of imprinted sorbent is higher than that of the non-imprinted sorbent.
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