摘要
借助于透射电镜技术观察了稀释作用及ｐＨ值对ＰＡＣＳ聚合形态的影响，研究了搅拌作用及ＰＡＣＳ投量对ＰＡＣＳ絮凝高岭土悬浊液效果的影响，探讨了ＰＡＣＳ的絮凝机理．结果表明，稀释作用会导致ＰＡＣＳ聚合大分子产生聚合度较小的组分，溶液的ｐＨ值能改变ＰＡＣＳ的形态，在较低ｐＨ值情况下，ＰＡＣＳ聚合物呈枝化结构，在较高ｐＨ值下，ＰＡＣＳ水解生成Ａｌ（ＯＨ）３胶体物质．ＰＡＣＳ是通过吸附电中和及吸附架桥作用使高岭土颗粒脱稳及凝聚的．
By application of pulse radiolysis, the quick scavenging mechanism of nitrogen dioxide radical NO_2 by ferulic acid and sinapic acid was studied. The rate constants for the hydrogen abstraction of nitrogen dioxide radical from HCas were determined as k=(7.2—7.4)×10 8dm 3·mol-1.s-1. It was also found out that HCA can also acavenge nitrous acid HNO_3 under the weak acidic condition.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1998年第4期392-395,共4页
Acta Scientiae Circumstantiae
关键词
PCS
混凝剂
聚合形态
絮凝机理
废水处理
scavenging, ferulic acid, sinapic acid, nitrogen dioxide radial.
