作　　者： ; ; ; ; ; ; (李濛晓妍）; (朱晓连）;

机构地区： 中国科学院南海海洋研究所广东省海洋药物重点实验室

出　　处： 《广东农业科学》 2016年第12期122-128,共7页

摘　　要： 虾壳黏附蛋白中的酸性氨基酸残基含量相对较高,有利于虾壳通过阳离子交换方式脱除水溶液中的重金属。脱无机盐虾壳经磷酸盐缓冲液浸泡活化可以得到一种能够脱除水溶液中低浓度镉离子的虾壳材料。以Cd^(2+)浓度约3 mg/L水溶液中的Cd^(2+)脱除率为指标,通过单因素和正交试验,考察了浸泡活化中磷酸盐缓冲液pH值、磷酸盐缓冲液浓度、磷酸盐缓冲液与虾壳液固比、活化时间等因素对虾壳脱除镉能力的影响。确定了磷酸盐缓冲液活化虾壳的最佳条件:磷酸盐缓冲液pH 7.5,浓度0.15 mol/L,液固比20∶1,活化时间120 min。所得磷酸盐缓冲液活化虾壳在100 mg/80 m L加入量下,对水溶液中Cd^(2+)的脱除率为95.25(±0.57)%。 Adhesion protein in shrimp shell is found with relatively higher content of acidic amino acid residues,which is conducive to remove heavy metals in the aqueous solution for shrimp shells through cation exchange. Decalcified shrimp shell and activated by phosphate buffer can produce a kind of shrimp shell material that can remove cadmium ion from dilute aqueous solution. Taking Cd2＋ removal rate as index,single-factor test combined with orthogonal test were used to optimize the shrimp shell activation condition. The optimum conditions were obtained as follows： phosphate buffer pH of 7.5,concentration of 0.15 mol/L,ratio of liquid to solid of 20∶1,activation time of 120 min. And the Cd2＋ removal rate was 95.25（±0.57）% when the phosphate buffer activation shrimp shell dosage was 100 mg/80 m L in Cd2＋ aqueous solution.

关 键 词： 虾壳 磷酸盐缓冲液 活化 镉 脱除

领　　域： [理学] [理学] [农业科学]