DOI: 10.1016/j.watres.2018.07.045
Scopus记录号: 2-s2.0-85053160450
论文题名: Rejection of haloacetic acids in water by multi-stage reverse osmosis: Efficiency, mechanisms, and influencing factors
作者: Wang L. ; Sun Y. ; Chen B.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 144 起始页码: 383
结束页码: 392
语种: 英语
英文关键词: Haloacetic acids
; Multi-stage reverses osmosis
; Purification
; QSAR
Scopus关键词: Computational chemistry
; Energy efficiency
; Energy utilization
; Halogen compounds
; Halogenation
; Hydrophobicity
; Product design
; Purification
; Recovery
; Reverse osmosis
; Water quality
; Water treatment
; Disinfection byproducts
; Haloacetic acids
; High energy consumption
; Hydrophobic interactions
; Multi stage
; Operational conditions
; QSAR
; Quantitative structure activity relationship
; Potable water
; acetic acid
; byproduct
; comparative study
; disinfection
; efficiency measurement
; energy efficiency
; factor analysis
; operations technology
; purification
; reverse osmosis
; water treatment
英文摘要: Among available technologies to ensure drinking water security, reverse osmosis (RO) has become the gold-standard for purification due to its maturity and reliability. However, high energy consumption and low water recovery are the major impediments for extensive adoption of RO. Multi-stage RO process is an innovative system design that can offer a more effective way to improve energy efficiency and water recovery, but it is rarely employed for disinfection by-product (DBP) treatment in drinking water. Thus, this study applied multi-stage RO to treat water containing haloacetic acids (HAAs), a prevalent class of DBPs with widespread occurrence and high toxicity, under a variety of environmental and operational conditions. Overall, we found that >75% HAAs were rejected and 87% of water was recovered with a five-stage RO process. For compounds with identical number of halogen substitutions, iodinated, brominated, and chlorinated HAAs were almost equally removed; however, highly halogenated species were easier to be rejected than lowly halogenated HAAs. By developing quantitative structure-activity relationship models, the importance of size exclusion, charge repulsion, and hydrophobic interaction effects on multi-stage RO removal was revealed. Environmental and operational variables like pH, operating pressure, water matrix, and membrane age also played important roles in this process. Increasing pH from 6.5 to 8.5 and membrane age apparently enhanced HAA rejections. In contrast, HAA rejection increased only slightly from an operating pressure of 4–6 bars but decreased markedly from 6 to 8 bars. Compared to ultrapure water, equal or higher removal efficiency was observed for HAAs spiked to tap water. Considering the need to balance water quality and quantity, a four-stage RO was preferred under this study's condition. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112505
Appears in Collections: 气候减缓与适应
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作者单位: Shenzhen Key Laboratory of Organic Pollution Prevention and Control, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen)518055, China
Recommended Citation:
Wang L.,Sun Y.,Chen B.. Rejection of haloacetic acids in water by multi-stage reverse osmosis: Efficiency, mechanisms, and influencing factors[J]. Water Research,2018-01-01,144