Ultrasonic irradiation control of silica fouling during membrane distillation process

doi:10.1016/j.desal.2016.02.032

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院饮用水科学与技术重点实验室

	Ultrasonic irradiation control of silica fouling during membrane distillation process
	Hou, Deyin; Wang, Jun; Huang, Hongjing; Fan, Hua; Zhao, Changwei; Zhang, Lijuan
刊名	DESALINATION
	2016-05-16
卷号	386 期号:0 页码:48-57
关键词	Membrane Distillation Membrane Fouling Ultrasonic Irradiation Silica Permeate Flux
DOI	10.1016/j.desal.2016.02.032
英文摘要	Ultrasonic irradiation was introduced into membrane distillation process and the influence of ultrasonic irradiation on silica fouling control was investigated. A gradual decline of permeate flux during the concentration process of silica solution was observed due to the formation and deposition of colloidal polysilicic acid on the membrane surface. The PTFE hollow fiber membrane could maintain its mechanical properties and initial pore size distribution in the presence of ultrasonic irradiation. Ultrasonic wave brought significant mechanical and thermal effects, and generated powerful shock wave and microstreaming with high speed. The microstreaming, shock wave and acoustic vortex streaming stimulated the liquid-membrane interface continuously, therefore the membrane surface could be effectively kept clean and the permeate flux was hardly affected by the increasing of concentration factor. Due to the charge neutralization and compression of double charged layer induced by calcium ions, the silica colloid stability was eliminated and the colloids aggregated. A large amount of silica scaling was deposited on the membrane surface even at the beginning of concentration process. With ultrasonic irradiation, the permeate flux maintained stable and was enhanced by about 43%; the ultrasonic irradiation could effectively control silica fouling during membrane distillation. (C) 2016 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/36224]
专题	生态环境研究中心_中国科学院饮用水科学与技术重点实验室
推荐引用方式 GB/T 7714	Hou, Deyin,Wang, Jun,Huang, Hongjing,et al. Ultrasonic irradiation control of silica fouling during membrane distillation process[J]. DESALINATION,2016,386(0):48-57.
APA	Hou, Deyin,Wang, Jun,Huang, Hongjing,Fan, Hua,Zhao, Changwei,&Zhang, Lijuan.(2016).Ultrasonic irradiation control of silica fouling during membrane distillation process.DESALINATION,386(0),48-57.
MLA	Hou, Deyin,et al."Ultrasonic irradiation control of silica fouling during membrane distillation process".DESALINATION 386.0(2016):48-57.