淀粉衍生物DSX的合成及对重金属的吸附

将以氮为中心的交联淀粉与丙烯酰胺进行接枝共聚和磺化，合成了淀粉衍生物硫代氨基淀粉黄原酸盐（DSX），并通过红外光谱分析对其结构进行了表征。用DSX处理Cu²⁺，Pb²⁺，Zn²⁺，Cd²⁺浓度均为20 mg/L的模拟重金属废水，结果表明，当温度为20 ℃，pH为7，DSX投加量为1.5 g/L，处理时间20 min时，Cu²⁺，Pb²⁺，Zn²⁺， Cd²⁺的吸附去除率分别达到99.5%，99.4%，99.0%，99.2%。

Synthesis of Starch Derivatives DSX and its Effect on Removal of Heavy Metal Ions

The starch derivatives DSX was synthesized by graft copolymerization and sulphonation of cross-linking starch and acrylamide with the center of Nitrogen.And its structure was analyzed by the Infrared spectra.An investigation on simulated heavy metal wastewater with 20 mg/L of Cu²⁺，Pb²⁺，Zn²⁺，Cd²⁺ was studied by using the starch derivatives DXS.It was showed that the average removal rates of Cu²⁺，Pb²⁺，Zn²⁺， Cd²⁺ were 99.5%，99.4%，99.0% and 99.2% respectively at temperature of 20 ℃, pH 7, DXS of 1.5 g/L for 20 minutes.