中文摘要：

制备了几种改性壳聚糖吸附剂,通过优化试验确定了制备改性壳聚糖吸附剂的乙酸/壳聚糖浓度配比及固化碱液条件,并比较了不同吸附剂对Hg2＋的吸附性能.以分子印迹法结合交联胺化改性法制备的Hg2＋分子印迹改性壳聚糖吸附剂小球（P-C-CTS-ex（Hg0.3））对Hg2＋具有最高的吸附容量,在低浓度Hg2＋（CHg2＋〈40mg/L）溶液中,此吸附剂对Hg2＋的吸附容量可达9.017 mg/g,比未改性壳聚糖（CTS）的吸附量高出1倍以上.研究还揭示了交联前Hg2＋对壳聚糖分子中的活性氨基的保护功能及除Hg2＋后的分子印迹作用.循环再生实验表明,P-C-CTS-ex（Hg0.3）经过8个循环以后的吸附容量保持稳定,颜色与外观等基本不变,重复使用性能稳定;而未改性CTS吸附剂经过＂吸附-脱附-再生＂8个循环后,球体积明显变小,颜色逐渐变黄,吸附容量不稳定.这表明本研究制备的Hg2＋分子印迹改性壳聚糖吸附剂的吸附容量和再生性能均明显优于普通壳聚糖吸附剂,具有应用于含Hg废水处理的潜力.

英文摘要：

Several modified chitosan sorbents were prepared. The concentration ratio of acetic and chitosan solution, as well as the condition of alkaline solidification solutions, was optimized , and the adsorption properties of sorbents to Hg2＋ in water solution was compared. The highest capability for Hg2＋ adsorption was observed when P-C-CTS-ex（ Hg0.3 ） was used as sorbent, which was prepared by a combination of polyamination/cross-linked reactions and Hg2＋ molecular imprinting technology. The adsorption capability of P-C-CTS-ex （ Hgo.3 ） arrived to 9. 017 mg/g for Hg2＋ at low-concentration （ CHg2＋ 〈40 mg/L）, which was one and more times higher than that of unmodified chitosan. The pro- tection on active amino-groups and the molecular imprinting mechanisms by Hg2＋ were also illustrated. Furthermore, the properties of regeneration and reusability of sorbents were investigated. After 8 times of ＂adsorption-desorption -regeneration＂ cycle, the appearance of P-C -CTS -ex （ Hg0.3 ） changed little and the reusability was stable. On the contrary, the size of unmodified chitosan got smaller, the color turned yellow gradually, and the adsorption capability was unstable. This suggested that P-C-CTS-ex （Hg03） exhibit more excellent adsorption and regeneration properties than those of chitosan sorbent, and can be used in Hg-contaminated waste water treatment.