CAREER: A Comprehensive Experimental and Theoretical Investigation into Membrane Fouling

职业：对膜污染的综合实验和理论研究

• 批准号: 0093617
• 负责人: Amy Childress
• 金额: $ 37.5万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-06-01 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0093617&HistoricalAwards=false
• 关键词: CAREER; Comprehensive; Experimental; Theoretical; Investigation

Proposal number: CTS- 0093617Principal investigator: Amy E. ChildressAffiliation: University of Nevada RenoCAREER: A Comprehensive Experimental and Theoretical Investigation into Membrane FoulingProject AbstractThis investigation takes a comprehensive approach to evaluating experimentally and theoretically the effects of both membrane and colloid properties on membrane fouling. The overall approach is to couple the extended DLVO theory with transport and deposition equations appropriate for crossflow membrane filtration. The specific goals are to develop methodology and to evaluate several fundamental membrane and colloid characteristics; to develop a particle deposition model that incorporates short-range acid-base forces of both the membranes and colloids; to perform a systematic experimental investigation to evaluate the overall impact of physico-chemical factors on membrane fouling; and to compare the theoretical predictions with experimental results. Additionally, particle deposition will be directly observed using AFM, and the extent of deposition will be related to flux decline using a deposited layer resistance model.Colloidal fouling will be considered within the framework of particle deposition, that is, the capture of colloidal particles from flowing suspensions by solid surfaces. From a broader perspective, an understanding of the principles governing the transport and interaction of colloidal particles in flowing suspensions is extremely important to many disciplines of science and engineering. Therefore, this research has numerous implications for other fields in which particle deposition plays a crucial role. Within the framework of membrane processes, this project has direct application to reduction of colloidal membrane fouling. Possible measures include optimization of feed stream pretreatment (to change the colloid characteristics), modification of the membrane surface, and selection of the most appropriate membrane based on feed stream characteristics. The CAREER education plan involves the development of a science and technology outreach program for 8th grade girls. The main objective of the program is to encourage the understanding that math and science are important and relevant to the girls' lives and to actively support the girls in pursuing education and employment in these areas.

提案编号：CTS-0093617主要研究者：Amy E.子女归属：内华达州大学RenoCAREER：膜污染的综合实验和理论研究项目摘要这项研究采取了一种综合的方法来评估实验和理论上的膜和胶体性质对膜污染的影响。整体的方法是耦合扩展DLVO理论与适合于错流膜过滤的传输和沉积方程。具体目标是开发方法，并评估几个基本的膜和胶体特性;开发一个粒子沉积模型，采用短程酸碱力的膜和胶体;进行系统的实验研究，以评估物理化学因素对膜污染的整体影响;并比较理论预测与实验结果。此外，颗粒沉积将直接观察使用AFM，和沉积的程度将相关的通量下降使用沉积层阻力model.Colloidal污垢将被认为是在颗粒沉积的框架内，也就是说，捕获胶体颗粒从流动的悬浮液由固体表面。从更广泛的角度来看，了解流动悬浮液中胶体颗粒的传输和相互作用的原理对于许多科学和工程学科都极其重要。因此，这项研究对颗粒沉积起关键作用的其他领域具有许多影响。在膜过程的框架内，该项目直接应用于减少胶体膜污染。 可能的措施包括优化进料流预处理（以改变胶体特性）、膜表面改性以及基于进料流特性选择最合适的膜。职业教育计划包括为八年级女生制定科学和技术推广方案。该方案的主要目标是鼓励人们认识到数学和科学对女孩的生活很重要，而且与女孩的生活密切相关，并积极支持女孩在这些领域接受教育和就业。