废弃虾壳制备改性甲壳素凝胶球及其对金属离子的吸附性能

发布时间：2018-04-10 08:02

本文选题：改性甲壳素　切入点：金属离子　出处：《生物质化学工程》2016年06期

【摘要】：以虾壳酶解残渣为原料,经5%盐酸脱钙处理4 h后,用45%氢氧化钠和460 W微波辅助脱乙酰处理10 min,得到脱乙酰度为40.4%的改性甲壳素。将改性甲壳素加入海藻酸钠水溶液中混合均匀,挤压滴入氯化钙水溶液中固化12h,制备得到直径为1.5~3.2 mm的凝胶小球,研究了该凝胶球对Pb~(2+)、Cr~(3+)、Ni~(2+)、Cu~(2+)、Co~(2+)和Zn~(2+)的吸附效果。结果表明:凝胶球对Cu~(2+)、Co~(2+)和Zn~(2+)的吸附效果最好,300 mg/L重金属离子溶液吸附处理8 h是较适宜的吸附条件,此条件下,Cu~(2+)、Co~(2+)和Zn~(2+)的吸附率分别达到94.2%、75.6%和57.3%。在Cu~(2+)-Co~(2+)-Zn~(2+)共存溶液体系中,凝胶球对3种离子的吸附率均有所提高,Cu~(2+)、Co~(2+)和Zn~(2+)的吸附率分别为95.1%、82.5%和67.5%。
[Abstract]:Modified chitin with deacetylation degree of 40.4% was obtained from shrimp shell residue treated with 5% hydrochloric acid decalcification for 4 h, 45% sodium hydroxide and 460W microwave assisted deacetylation for 10 min.The modified chitin was mixed evenly in sodium alginate solution, and then squeezed into calcium chloride solution for 12 hours. The gel pellets with diameter of 1.5 ~ 3.2mm were prepared. The adsorption effects of the gel spheres on Pb~(2 (Pb~(2) and Zn~(2 were studied.The results showed that the best adsorption efficiency of the gel spheres for Cu~(2 and Zn~(2) was 8h, and the adsorption rates reached 94.2c75.6% and 57.3%, respectively. The results showed that the adsorption efficiency of the gel spheres was 94.6% and 57.3%, respectively, and the adsorption rates were 94.22% and 57.3%, respectively, under this condition, the adsorption rates of the Gel spheres were 94.6% and 57.3%, respectively, and the adsorption rates were 94.2% and 57.3%, respectively.The adsorption rates of the three ions on the gel spheres were increased by 95.1% and 67.5%, respectively. The adsorption rates of the three ions in the solution system were 95.1% and 67.5%, respectively, and the adsorption rates of the two ions were 95.5% and 67.5%, respectively, and the adsorption rates of the two ions were 95.5% and 67.5%, respectively, and the adsorption rates of the two ions were 95.1% and 67.5%, respectively.
【作者单位】：江南大学药学院;扬州日兴生物科技股份有限公司;
【基金】：江苏省重大成果转化项目(BA2015006)
【分类号】：X703;O647.33

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