用磺化棉富集痕量Hg(Ⅱ)

CONCENTRATING TRACE Hg(Ⅱ) WITH XANTHATED COTTON FIBER

着重研究磺化棉对Ｈｇ（ Ⅱ） 的吸附特性，同时探讨了磺化棉的制备方法以及磺化棉及其络合物在溶液中的稳定性。

The xanthated cotton fiber can be prepared with two steps reaction, it is alkalzed at frist and then xanthated.. When the alkalzing reacting was in alcohol,the concentration of NaOH was required about 2%(w/v),and the prepared xanthated cotton fiber was soft. The xanthated cotton fiber was unstable, it was decomposed to CS 2 in acidic water. But its complex compounds with Hg(Ⅱ) were very stable. It can be used to concentrate Hg(Ⅱ) in aqueous solution, for the recovery ration of Hg(Ⅱ) was over 95% in aqueous solution at 0 6N HCI～pH10,and absorptive capacity was 9 3 mg Hg/g xanthated cotton fiber.