不同部位的蟹壳对Pb~（2＋）和Cd~（2＋）去除的比较研究

研究了梭子蟹（Portunus trituberculatus）蟹背壳与其他部位的蟹壳对水溶液中的Pb2＋、Cd2＋去除作用的差异,以及加入量、处理时间对其去除作用的影响.结果表明：蟹背壳对Pb2＋的极限去除率可达89%,其他部位蟹壳则为74%;两种蟹壳对Cd2＋的极限去除率均可达97%;在加入质量分数为0.02%、平衡10 min的条件下,蟹背壳对Cd2＋的去除率约为63%,其他部位蟹壳则为90%.可见,不同部位的蟹壳在去除水溶液中的Pb2＋、Cd2＋特性方面存在明显差异.

Comparative Study on the Removal of Pb~（2＋） and Cd~（2＋） in Different Parts of the Crab Shell

The adsorption differences of heavy metal ions（Pb2＋,Cd2＋） in aqueous solution on Portunus trituberculatus back-shell and other parts of the crab shell were studied,and the adsorption effects of the adding amount and the processing time were also studied.The results showed that for crab back-shell,the maximum removal rate of Pb2＋ could reach 89 %,compared with 74 % of the other parts of the crab shell;for two kinds of crab shell,Cd2＋ removal could reach 97 %.Prior to joining the amount 0.02 % under the conditions of equilibrium 10 min,the Cd2＋ removal rate of the crab back-shell was about 63 %,other parts of the crab shells were 90 %.It was shown that different parts of the crab shell had obvious differences in the removal of aqueous Pb2＋,Cd2＋ characteristic aspects.