St Petersburg State Chemical Pharmaceutical Academy, 14 Prof Popov St, St Petersburg 197376, Russia.
Bioresour Technol. 2010 Mar;101(6):1769-75. doi: 10.1016/j.biortech.2009.10.033. Epub 2009 Nov 8.
A number of chelating resins were prepared by chemical derivatization of the chitin-glucan (CG) complex isolated from Aspergillus niger biomass, namely chitosan-glucan (CsG), O-carboxymethyl-chitin-glucan (CM-CG), O-(2-sulfoethyl)chitin-glucan (SE-CG), and N-(2-carboxyethyl)chitosan-glucan (CE-CsG). The chemical modification was confirmed by FT-IR and elemental analysis. Nanosecond electron beam irradiation was used to produce insoluble resins and to preserve the reactive functional groups. Batch experiments were carried out to evaluate the adsorption selectivity and capacity of the resins toward transition metal ions (Cu(2+), Ni(2+), Co(2+), Zn(2+)). The resins showed good adsorption capability with the following selectivity series: Co(2+)<Ni(2+)<Cu(2+)>Zn(2+). The total metal adsorption capacities of CG, CsG, CM-CG, SE-CG, and CE-CsG resins at pH 6.5 (ammonium acetate buffer) were found to be 0.205, 0.382, 1.752, 0.319, and 0.350 mmol g(-1), respectively. Our results suggest that, depending on the type of chemical modification, the chitin-glucan complexes can be used either for selective Cu(2+) removal (CsG) or for total transition metal adsorption (CM-CG) from aqueous effluents.
从黑曲霉生物质中分离出的几丁质-葡聚糖（CG）复合物通过化学衍生化制备了一些螯合树脂，即壳聚糖-葡聚糖（CsG）、O-羧甲基-几丁质-葡聚糖（CM-CG）、O-（2-磺乙基）几丁质-葡聚糖（SE-CG）和 N-（2-羧乙基）壳聚糖-葡聚糖（CE-CsG）。化学修饰通过傅里叶变换红外光谱（FT-IR）和元素分析得到证实。纳秒电子束辐照用于产生不溶性树脂并保留反应性官能团。进行批量实验以评估树脂对过渡金属离子（Cu（2+）、Ni（2+）、Co（2+）、Zn（2+））的吸附选择性和容量。树脂对 Co（2+）<Ni（2+）<Cu（2+）>Zn（2+）具有良好的吸附能力。在 pH 6.5（乙酸铵缓冲液）下，CG、CsG、CM-CG、SE-CG 和 CE-CsG 树脂的总金属吸附容量分别为 0.205、0.382、1.752、0.319 和 0.350 mmol g（-1）。我们的结果表明，根据化学修饰的类型，几丁质-葡聚糖复合物可用于选择性去除 Cu（2+）（CsG）或从水溶液中吸附总过渡金属（CM-CG）。
