Polyacrylamide as a kind of macromolecular flocculent which has broad application prospects with benefits of good treat-ment effect, good water solubility, excellent flocculability and adsorption property. In this paper, common modification methods of an-ionized polycrylamide, cationic-activated polyacrylamide an copolymerizing of polyacrylamide have been summarized, and the applica-tion of the modified products in wastewater treatment and good result have been enumerated. The paper illustrated the necessity and ef-fectiveness of modification. The results show that after modified polyacrylamide can improve the using effect, broaden the use range and decrease quantity. Finally, the prospects and development tendency of modified polyacrylamide are presented. Improving existing floc-culent properties and the development of high quality flocculants will be the focus of research in the future.%聚丙烯酰胺是一种使用范围广、处理效果好的高分子絮凝剂,具有良好的水溶性、优良的絮凝性能和吸附性能.文章总结了聚丙烯酰胺阴离子化、阳离子化、单体共聚的常见改性方法.列举了其改性产物在废水处理中的应用和取得的良好效果.对聚丙烯酰胺改性研究的必要性和有效性进行了说明.表明:聚丙烯酰胺经过改性后可提高使用效果、拓宽使用范围、减少投药量等优点.最后对聚丙烯酰胺改性的发展方向做了展望,改善现有絮凝剂性能和发展高品质絮凝剂是将来研究的重点.
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