超声波对氢氧化镁混凝性能及絮体特性影响  

Effects of ultrasonic on magnesium hydroxide coagulation performance and floc properties

作　　者：焦秀梅[1] 郭晓玉[1] 赵建海[1] 刘诗雨[1] 封娜[1] 

机构地区：[1]天津城建大学环境与市政工程学院,天津市水质科学与技术重点实验室,天津300384

出　　处：《环境工程学报》2013年第12期4811-4815,共5页Chinese Journal of Environmental Engineering

基　　金：天津市自然科学基金项目(10JCYBJC05700)

摘　　要：以氢氧化镁作为混凝剂,不同浊度高岭土水样为研究对象,运用iPDA在线监测技术,探求了超声波对絮体特性和混凝过程的影响。结果表明,在混凝初期的5 s内,增大超声功率能够有利于混凝作用发生。超声功率为80 W,浊度去除率最高。随着超声时间延长到10 s时,超声条件下FI值变小絮凝效果逐渐变差。Zeta电位与絮体粒度存在相关关系。By using magnesium hydroxide as coagulant and the application of online intelligent particle dispersion analyzer （iPDA） ,we investigated the effects of ultrasonic on floc properties and coagulation performance of kaolin water solutions with various turbidities. The results showed that at the first 5 seconds of initial coagulation, increased ultrasonic intensity could enhance the coagulation process. The turbidity removal efficiency reached its maximum when the ultrasonic intensity was 80 W. Decreased FI value and broken flocs were observed with the extension of ultrasonic time to 10 seconds. Zeta potentials were correlated to the size of flocs.

关 键 词：超声波 氢氧化镁 混凝 絮体 

分 类 号：X703.1[环境科学与工程—环境工程]