| 项目编号: | 1605882
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| 项目名称: | Evaluation of the Chemical Drivers behind Membrane Integrity Loss in Halide-Impaired Waters during Chemical Disinfection to Advance Optimal Membrane Structural Design |
| 作者: | Amisha Shah
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| 承担单位: | Purdue University
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| 批准年: | 2016
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| 开始日期: | 2016-07-15
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| 结束日期: | 2019-06-30
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| 资助金额: | 261964
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Engineering - Chemical, Bioengineering, Environmental, and Transport Systems
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| 英文关键词: | impaired water
; novel membrane surface
; membrane filtration
; membrane engineering application
; membrane degradation
; membrane surface
; combined chemical effect
; membrane failure
; chemical analog
; solid membrane material
; chemical principle
; membrane performance
; chemical kinetics
; chemical alteration
; chemical disinfectant
; such membrane material
; membrane lifetime
; project
; design
; halide salt
; various disinfection strategy
; clear technological advancement
; future informed design
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| 英文摘要: | 160588
Shah
In recent years, the role of membrane filtration to treat salt-impaired waters has become more commonplace as freshwater shortages have increased the demand for seawater desalination and water reuse. The process of disinfection and desalination of impaired waters is challenged by the extreme variation in water composition. This project presents a fundamental research framework which will enable future informed design of water treatment strategies under such impaired water conditions, specifically with respect to prolonging membrane lifetime. The central aim of this research project is to integrate governing chemical principles of polymers and aqueous phase chemistry to advance the scientific foundation in membrane engineering applications. The project has the following planned outcomes: (1) prediction of membrane degradation following disinfectant exposure in halide-impaired waters, and, (2) informed design of novel membrane surfaces that are resistant to these effects.
To achieve these outcomes, solid membrane materials and model compounds that serve as their chemical analogs will be used to assess chemical kinetics, by-product formation, and morphological and chemical alterations of the membrane surface. Model feedstock waters will contain various mixtures of halide salts (e.g. chloride, bromide, and iodide ions) as well as chemical disinfectants (e.g. free chlorine and chloramines) in order to measure combined chemical effects. The experimental program will identify the effects of water quality (i.e. salinity, temperature) and operational conditions (oxidant dose). This is especially important given that concentration polarization effects observed during membrane filtration can potentially magnify the impact of such parameters. Finally, this project will inform the design of novel membrane surfaces that minimize membrane failure through chemical and structural modifications. The development of such membrane materials would represent a clear technological advancement which could result in significant energy and economic savings to facilities treating impaired waters. Overall, this project will provide desalination industries and water reclamation utilities valuable insight on how impaired waters with high salt (halide) content will effect membrane performance when various disinfection strategies are applied prior to nanofiltration and reverse osmosis treatment. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/91759
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Amisha Shah. Evaluation of the Chemical Drivers behind Membrane Integrity Loss in Halide-Impaired Waters during Chemical Disinfection to Advance Optimal Membrane Structural Design. 2016-01-01.
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