DOI: 10.1016/j.watres.2018.04.012
Scopus记录号: 2-s2.0-85047420706
论文题名: Multiple dynamic Al-based floc layers on ultrafiltration membrane surfaces for humic acid and reservoir water fouling reduction
作者: Ma B. ; Li W. ; Liu R. ; Liu G. ; Sun J. ; Liu H. ; Qu J. ; van der Meer W.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 139 起始页码: 291
结束页码: 300
语种: 英语
英文关键词: Al-based flocs
; Fouling reduction
; Humic acid and reservoir water
; Multiple dynamic layers
; Ultrafiltration membrane
Scopus关键词: Biological materials
; Efficiency
; Land use
; Membrane fouling
; Membranes
; Organic acids
; Particle size
; Reservoirs (water)
; Tanks (containers)
; Ultrafiltration
; Water filtration
; Water injection
; Water treatment
; Continuous injections
; Fouling reduction
; Large specific surface areas
; Low removal efficiencies
; Multiple dynamic layers
; Reservoir water
; Ultra-filtration membranes
; Utilization efficiency
; Microfiltration
; aluminum
; humic acid
; polyacrylamide
; water
; aluminum
; aeration
; fouling
; humic acid
; membrane
; molecular analysis
; operations technology
; performance assessment
; pollutant removal
; reduction
; reservoir
; ultrafiltration
; water treatment
; aeration
; Article
; China
; controlled study
; fouling control
; membrane
; molecular weight
; particle size
; priority journal
; reduction (chemistry)
; surface area
; surface property
; suspension
; ultrafiltration
; water supply
; zeta potential
; artificial membrane
; chemistry
; devices
; flocculation
; humic substance
; procedures
; ultrafiltration
; water management
; water supply
; Beijing [China]
; China
; Miyun Reservoir
; Aluminum
; Flocculation
; Humic Substances
; Membranes, Artificial
; Particle Size
; Ultrafiltration
; Water Purification
; Water Supply
英文摘要: The integration of adsorbents with ultrafiltration (UF) membranes is a promising method for alleviating membrane fouling and reducing land use. However, adsorbents typically are only injected into the membrane tank once, resulting in a single dynamic protection layer and low removal efficiency over long-term operation. In addition, the granular adsorbents used can cause membrane surface damage. To overcome these disadvantages, we injected inexpensive and loose aluminum (Al)-based flocs directly into a membrane tank with bottom aeration in the presence of humic acid (HA) or raw water taken from the Miyun Reservoir (Beijing, China). Results showed that the flocs were well suspended in the membrane tank, and multiple dynamic floc protection layers were formed (sandwich-like) on the membrane surface with multiple batch injections. Higher frequency floc injections resulted in better floc utilization efficiency and less severe membrane fouling. With continuous injection, acid solutions demonstrated better performance in removing HA molecules, especially those with small molecular weight, and in alleviating membrane fouling compared with the use of high aeration rate or polyacrylamide injection. This was attributed to the small particle size, large specific surface area, and high zeta potential of the flocs. Additionally, excellent UF membrane performance was exhibited by reservoir water with continuous injection and acid solution. Based on the outstanding UF membrane performance, this innovative integrated filtration with loose Al-based flocs has great application potential for water treatment. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112741
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Xi'an University of Architecture and TechnologyShaanxi 710055, China; Sanitary Engineering, Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, Delft, 2600GA, Netherlands; University of Chinese Academy of Sciences, Beijing, 100049, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Science and Technology, University of Twente, P.O. Box 217, Enschede, 7500AE, Netherlands
Recommended Citation:
Ma B.,Li W.,Liu R.,et al. Multiple dynamic Al-based floc layers on ultrafiltration membrane surfaces for humic acid and reservoir water fouling reduction[J]. Water Research,2018-01-01,139