干旱区生态环境知识资源中心(Arid): Surface-Induced Silica Scaling during Brackish Water Desalination: The Role of Surface Charge and Specific Chemical Groups

Arid

DOI	10.1021/acs.est.8b06154
	Surface-Induced Silica Scaling during Brackish Water Desalination: The Role of Surface Charge and Specific Chemical Groups
	Rathinam, Karthik 1; Abraham, Shiju 1; Oren, Yoram 1; Schwahn, Dietmar 2; Petry, Winfried 2; Kaufman, Yair 1; Kasher, Roni 1
通讯作者	Kaufman, Yair ; Kasher, Roni
来源期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN	0013-936X
EISSN	1520-5851
出版年	2019
卷号	53 期号:9 页码:5202-5211
英文摘要	Silica scaling of membranes used in reverse osmosis desalination processes is a severe problem, especially during the desalination of brackish groundwater due to high silica concentrations. This problem limits the water supply in inland arid and semiarid regions. Here, we investigated the influence of surface-exposed organic functional groups on silica precipitation and scaling. A test solution simulating the mineral content of brackish groundwater desalination brine at 75% recovery was used. The mass and chemical composition of the precipitated silica was monitored using a quartz crystal microbalance, X-ray photoelectron spectroscopy, and infrared spectroscopy, showing that surfaces with positively charged groups induced rapid silica precipitation, and the rate of silica precipitation followed the order -NH2 similar to -N+ (CH3)(3) > -NH2/-COOH > -H2PO3 similar to -OH > -COOH > -CH3. Force vs distance AFM measurements showed that the adhesion energy between a silica colloid glued to AFM cantilever and the studied surfaces increased as the surface charge changed from negative to positive. Thus, for the first time direct measurements of molecular forces and specific chemical groups that govern silica scaling during brackish water desalination is reported here. The influence of the different functional groups and the effect of the surface charge on silica precipitation that were found here can be used to design membranes that resist silica scaling in membrane-based desalination processes.
类型	Article
语种	英语
国家	Israel ; Germany
收录类别	SCI-E
WOS记录号	WOS:000467641800058
WOS关键词	REVERSE-OSMOSIS ; REMOVAL ; MITIGATION ; ANTISCALANTS ; PRETREATMENT ; AGGREGATION ; ADSORPTION ; EFFLUENTS ; CHEMISTRY ; MEMBRANES
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS研究方向	Engineering ; Environmental Sciences & Ecology
来源机构	Ben-Gurion University of the Negev
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215528
作者单位	1.Ben Gurion Univ Negev, Zuckerberg Inst Water Res, Blaustein Inst Desert Res, Dept Desalinat & Water Treatment, Sde Boqer Campus, IL-8499000 Midreshet Ben Gurion, Israel; 2.Tech Univ Munich, Heinz Maier Leibnitz FRM 2, Forsch Neutronenquelle, James Franck Str 1, D-85748 Garching, Germany
推荐引用方式 GB/T 7714	Rathinam, Karthik,Abraham, Shiju,Oren, Yoram,et al. Surface-Induced Silica Scaling during Brackish Water Desalination: The Role of Surface Charge and Specific Chemical Groups[J]. Ben-Gurion University of the Negev,2019,53(9):5202-5211.
APA	Rathinam, Karthik.,Abraham, Shiju.,Oren, Yoram.,Schwahn, Dietmar.,Petry, Winfried.,...&Kasher, Roni.(2019).Surface-Induced Silica Scaling during Brackish Water Desalination: The Role of Surface Charge and Specific Chemical Groups.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(9),5202-5211.
MLA	Rathinam, Karthik,et al."Surface-Induced Silica Scaling during Brackish Water Desalination: The Role of Surface Charge and Specific Chemical Groups".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.9(2019):5202-5211.