中文摘要：

将海藻酸钠用氨基硫脲进行改性,合成了新型絮凝剂.用红外光谱、核磁共振、元素分析等对该絮凝剂进行了表征.并研究了絮凝剂对5种重金属离子（Fe3＋、Cu2＋、Pb2＋、Cd2＋、Hg2＋）的絮凝性能.结果表明,改性海藻酸钠絮凝剂对污水中不同浓度的重金属离子均有明显的絮凝效果.吸附动力学表明,絮凝过程在很短时间内即可完成,该产物具有处理重金属离子污水的应用前景.

英文摘要：

A new flocculant was synthesized through the modification of alginate with thiosemicarbazide.The structure of the flocculant was characterized by FTIR,1H NMR and elemental analysis.The flocculantion behaviors for five heavy metal ions（Fe3＋,Cu2＋,Pb2＋,Cd2＋and Hg2＋）were investigated.The results showed that the modified alginate flocculant had obvious flocculantion for the heavy metal ions at varied concentrations.The kinetics study demonstrated that the flocculation was completed rapidly.The products could potentially be used for the treatment of sewage containing heavy metal ions.