GOALI: Stimulated Raman microscopy for sensitive real-time detection of membrane fouling

GOALI：受激拉曼显微镜用于灵敏地实时检测膜污染

基本信息

批准号：
1826542
负责人：
Juliet Gopinath
金额：
$ 36.1万
依托单位：
University of Colorado at Boulder
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-01 至 2023-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1826542&HistoricalAwards=false
关键词：
GOALI Stimulated Raman microscopy sensitive

项目摘要

A membrane provides a selective barrier or filter, allowing certain compounds to pass through but preventing others. Membranes separate salts from sea water to produce drinking water. In emissions control, membranes prevent pollutants from being released into the environment. In landfills, membranes stop contaminants from leaching into the groundwater. In the process of filtering contaminants, however, the retention of certain compounds can lead to fouling. Fouling is a serious and ubiquitous problem in purification processes that rely on membranes, as it decreases membrane performance, increases energy consumption, and can lead to permanent damage of the membrane. Combined, these effects increase the cost of membrane operation, and thus, fouling mitigation is of great interest for industrial membrane processes. A key part of the mitigation strategy is detection, in order to proactively prevent fouling before it proceeds unchecked. Existing detection techniques rely on bulk measurements, such as pressure drop across the membrane, which can give an early warning of fouling. However, these bulk techniques do not provide chemical specific information on what leads to fouling. It is anticipated that chemical identification could facilitate molecular-level design of membranes that are resistant to fouling. The research will demonstrate an innovative method to detect membrane fouling under realistic operating conditions. The work will demonstrate an effective, high-resolution, label-free, non-destructive, and non-invasive real-time method for fouling detection under realistic operating conditions. A number of fundamental questions will be answered, including the sensitivity of the proposed optical detection method to early-stage reverse-osmosis, scaling initiation and growth as manifested by an increase in lateral and thickness dimensions. The research is an interdisciplinary topic spanning physics, materials science and engineering. If successful, the project will enable higher efficiency and lower-cost operation of reverse-osmosis desalination systems; and will provide similar significant benefits for other membrane-based separation applications. The project will provide research opportunities for graduate and undergraduate students, as well as dissemination to under-represented students at the college and K-12 level through involvement with public scientific demonstrations, laboratory tours, K-12 courses, and involvement with the Women in Electrical, Computer and Energy Engineering group.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

膜提供选择性屏障或过滤器，允许某些化合物通过但阻止其他化合物通过。膜从海水中分离盐以生产饮用水。在排放控制中，膜可防止污染物释放到环境中。在垃圾填埋场，膜可以阻止污染物渗入地下水。然而，在过滤污染物的过程中，某些化合物的滞留可能会导致结垢。在依赖膜的净化过程中，结垢是一个严重且普遍存在的问题，因为它会降低膜性能，增加能耗，并可能导致膜的永久性损坏。综合起来，这些影响增加了膜运行的成本，因此，减轻污染对于工业膜工艺来说是非常重要的。缓解策略的一个关键部分是检测，以便在污垢不受控制地发生之前主动预防。现有的检测技术依赖于批量测量，例如跨膜的压降，这可以对结垢发出早期预警。然而，这些批量技术不提供有关导致结垢的化学具体信息。预计化学鉴定可以促进抗污染膜的分子水平设计。该研究将展示一种在实际操作条件下检测膜污染的创新方法。这项工作将展示一种在实际操作条件下有效、高分辨率、无标记、非破坏性和非侵入性实时污垢检测方法。许多基本问题将得到解答，包括所提出的光学检测方法对早期反渗透的敏感性、结垢的引发和生长（表现为横向和厚度尺寸的增加）。该研究是一个跨学科课题，涵盖物理学、材料科学和工程学。如果成功，该项目将使反渗透海水淡化系统的运行效率更高、成本更低；并将为其他基于膜的分离应用提供类似的显着优势。该项目将为研究生和本科生提供研究机会，并通过参与公共科学演示、实验室参观、K-12 课程以及与女性参与，向大学和 K-12 级别的代表性不足的学生进行传播。电气、计算机和能源工程组。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（4）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Real-time monitoring of calcium sulfate scale removal from RO desalination membranes using Raman spectroscopy

DOI：
10.1016/j.desal.2020.114736
发表时间：
2021-01-01
期刊：
Desalination
影响因子：
9.9
作者：
Danielle J. Park;O. Supekar;A. Greenberg;J. Gopinath;V. Bright
通讯作者：
V. Bright

Narrow linewidth picosecond source at 760 nm generating 50 nJ pulses using four-wave mixing

760 nm 窄线宽皮秒源使用四波混频产生 50 nJ 脉冲

DOI：
10.1364/cleo_si.2022.sf4h.1
发表时间：
2022-07
期刊：
Conference on Lasers and Electro-Optics (CLEO
影响因子：
0
作者：
Supekar, Omkar D.;Simmons, Y. Lange;Bright, Victor M.;Gopinath, Juliet T.
通讯作者：
Gopinath, Juliet T.

In-situ monitoring of calcium carbonate scale progression on reverse osmosis membranes using Raman spectroscopy

使用拉曼光谱原位监测反渗透膜上碳酸钙结垢的进展

DOI：
10.5004/dwt.2022.28883
发表时间：
2022-01
期刊：
DESALINATION AND WATER TREATMENT
影响因子：
0
作者：
Park, Danielle J.;Supekar, Omkar D.;Greenberg, Alan R.;Gopinath, Juliet T.;Bright, Victor M.
通讯作者：
Bright, Victor M.

Raman spectroscopy for real-time concurrent detection of multiple scalants on RO membranes

用于实时同时检测 RO 膜上多个尺度的拉曼光谱