摘要
以聚二甲基二烯丙基氯化铵PDADMAC(特性粘度分别为2.7,1.4,0.7)为絮凝剂,对比PAC和PFC,通过残余浊度、Zeta电位、FI絮凝指数的测定,研究了PDADMAC对高岭土悬浊体系(浊度分别为6000,1000,200和10NTU)的絮凝特性,并对其絮凝作用机理进行了探讨.结果表明,PDADMAC的吸附构型决定其絮凝机理在较低初始悬浊物浓度下(200NTU)为单个颗粒物表面吸附覆盖及其"吸附电中和"絮凝模型;在高浊条件下(>1000NTU)为单颗粒表面(Monomer)部分吸附覆盖及其"吸附架桥"絮凝模型.
The flocculation mechanism of polydiallyldimethylammonium chloride （PDADMAC） in the kaolin suspension system was studied using optical monitoring, zeta potential measurement and residual turbidity measurement. The results showed that the flocculation mechanism of PDADMAC mainly depends on the adsorption and conformation of PDADMAC. Under low turbidity conditions （200 NTU）, the main flocculation mechanism is ＂adsorption charge neutralization action＂. Under high turbidity conditions （ 〉 1000 NTU ）, ＂adsorption bridging action＂ plays an important part in the mechanism.
出处
《环境科学学报》
CAS
CSCD
北大核心
2007年第11期1874-1880,共7页
Acta Scientiae Circumstantiae
基金
国家重点基础研究发展规划(973)项目(No.2002CB412308)~~
关键词
絮凝
阳离子聚电解质
聚二甲基二烯丙基氯化铵
flocculation
cationic polyelectrolyte
polydiallyldimethylammonium chloride
