壳寡／聚糖系列衍生物对铅离子的吸附研究

比较了9种壳寡/聚糖系列衍生物作为吸附剂对同一浓度铅离子的吸附,结果为交联香草醛壳聚糖（CTSV-G）〉香草醛壳聚糖（CTSV）〉羧甲基壳聚糖（CM-CTS）〉巯基化壳寡糖（O-CTS-SH）〉壳寡糖（O-CTS）〉香草醛壳寡糖（O-CTSV）〉壳聚糖（CTS）〉壳寡糖硫酸酯（O-CTSS）〉羧甲基壳寡糖（CM-O-CTS）;比较了同一吸附剂对不同浓度的铅离子的吸附率,其吸附率随着溶液浓度的升高而降低。研究了各吸附剂在铅、镉、铬金属离子竞争中对铅吸附的影响,结果表明各吸附剂对镉和铅离子的吸附效果最好,可达80%,对铬离子吸附较少,在40%左右。

Research on Adsorption of Serial Derivatives of Chitooligosaccharide & Chitosan to Lead Ion

The adsorption abilities of the nine serial derivatives of chitooligosaccharide ＆ chitosan to lead ion with the same concentration are compared and the results reveal the abilities of the derivatives are as follows from the strongest to the least： CTSV-G 〉 CTSV 〉 CM-CTS 〉 O-CTS-SH 〉 O-CTS 〉 O-CTSV 〉 CTS 〉 O-CTSS 〉 CM-OCTS;the adsorption ability of each derivative with the same quantity to lead ion with different concentrations is also compared,the results of which indicate that the absorption rate decreases as the solution concentration increases.In addition,the competitive adsorption of different adsorbents to lead ion,cadmium ion and chromium ion is compared.The results discover that all absorbents have better adsorption effect on lead ion and cadmium ion with the efficiency of up to 80% than chromium with the efficiency of about 40%.