摘要
用聚丙烯酸酰胺(PAM)、增聚羟基氯化铝(PACS)和水解聚丙烯酰胺(HPAM)等高聚物作絮凝剂研究其各自对土壤悬浮体的絮凝效果及絮凝机理已有报道,本文研究了HPAM和PACS混合时对钠型蒙脱土悬浮体的絮凝作用,结果表明,混合使用比单独使用时效果显著。
The flocculation of sodium montmorillonite suspension at pH=9 was systematically studied with an polyhydroxyaluminium chloride followed by a series of polyacrylamides(M = 3×106) with different hydrolyzed degrees. The results show that the bonding interactions between hydroaluminium ions arid ionic and nonionic polyacryamide have a decisive influence on the flocculation behavior of the respctive polyacrylamide towards montmorillonite suspensions. These interactions are probably specific and arise from the opposite charge interactions between the hydrolyzed metal ions and polyacrylamide, though hydrogen bonding may also play a part.It appears possibly that the positively charged hydjrolyzed metal ions can act as 'anchor points' to attach the negatively charged polyacrylamides to the surfaces of negative charge. The flocculation effect of the polyacrylamide can therefore be enhanced by the increased adsorption, though an excess of 'anchor points' might flatten the polyacrylamide and hinder flocculation.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第7期973-975,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
HPAM
PACS
絮凝剂
钠型
蒙脱土
Flocculation, Sodium montmorillonite, Hydrolyzed polyacrylamide, Polyhydroxyalu-minium chloride
