权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

CAREER: Accelerating sustainable water treatment using smart ultraviolet light emitting diodes

职业：使用智能紫外线发光二极管加速可持续水处理

基本信息

批准号：
2046660
负责人：
Samuel Snow
金额：
$ 53.49万
依托单位：
Louisiana State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-05-15 至 2026-04-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2046660&HistoricalAwards=false
关键词：
CAREER Accelerating sustainable water treatment

项目摘要

Over the past few decades, light emitting diodes, or LEDs for short, have become a common feature in nearly every home. More recently, researchers have created LEDs that can shine high-energy ultraviolet (UV) rays. UV rays have been widely used in various fields, including in the water treatment industry to kill germs and to remove pollutants in water. However, the adoption of UV technology in the water industry has been hindered by relatively higher cost and low energy efficiency. UV LEDs have many advantages over existing UV light technology due to greater energy efficiency, greater durability, lower cost, and ability for digital interfacing. The goal of this CAREER project is to develop the first Smart UV LED systems utilizing novel rapid pulsed UV LEDs. This will be achieved through a series of experiments to understand the mechanisms for UV catalyzed chemical reactions to kill pathogens and degrade pollutants. Successful completion of this research will provide benefits globally through the development of hand-held devices for more efficient treatment of water at lower cost in remote places. This research will be integrated with an education program focused on engaging middle and high school students in STEM activities to increase scientific literacy. College students will have opportunities for study abroad trips to developing countries to test new devices while training graduate students to perform cutting edge scientific experiments. The overall goal of this project is to develop a mechanistic understanding of UV-LED catalyzed photochemical reactions to enable the design of Smart UV-LED technologies. Specifically, the research objectives are to: 1) identify and select for specific radicals produced during chlorine photolysis to optimize micropollutant degradation in complex water matrices; 2) harness the ability to apply a duty cycle to UV-LED lamps to enhance UV and chemical-UV disinfection processes to disrupt cellular repair and achieve targeted damage of cellular components; and 3) to include high school research interns, undergraduates, and graduate students in the process of designing and testing novel UV-LED devices for application in developing countries. The project will be accomplished using custom-designed LED photoreactors, a suite of state-of-the-science radical characterization techniques based on electron spin resonance spectroscopy, and microbiological assays to elucidate the underlying mechanisms of cellular disruption. Portable, Smart UV-LED devices will be constructed using Arduino microcontrollers to control the pulse frequency and duty cycle. Together, these improvements will pave the way for the next leap forward in sustainable water treatment, water reuse, and point-of-use technologies. Successful completion of this research will have potential to contribute to fundamental scientific advancement in related fields such as polymer curing and photolithography. The research will be tightly integrated with STEM education and outreach efforts to train and encourage the next generation of leaders in water science and technology.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.

在过去的几十年里，发光二极管，或简称LED，已成为几乎每个家庭的常见功能。最近，研究人员创造了可以发出高能紫外线（UV）的LED。紫外线已广泛应用于各个领域，包括水处理行业，以杀死细菌并去除水中的污染物。然而，UV技术在水行业的采用受到相对较高的成本和低能效的阻碍。UV LED与现有的UV光技术相比具有许多优点，这是由于更高的能效、更高的耐用性、更低的成本和数字接口的能力。这个CAREER项目的目标是利用新型快速脉冲UV LED开发第一个智能UV LED系统。这将通过一系列实验来实现，以了解紫外线催化化学反应杀死病原体和降解污染物的机制。这项研究的成功完成将通过开发手持设备在偏远地区以更低的成本更有效地处理水而在全球范围内带来好处。这项研究将与一项教育计划相结合，该计划的重点是让初中和高中学生参与STEM活动，以提高科学素养。大学生将有机会到发展中国家留学，测试新设备，同时培训研究生进行尖端科学实验。该项目的总体目标是发展对UV-LED催化光化学反应的机械理解，以实现智能UV-LED技术的设计。具体而言，研究目标是：1）识别和选择氯光解过程中产生的特定自由基，以优化复杂水基质中的微污染物降解; 2）利用UV-LED灯的占空比能力，以增强紫外线和化学紫外线消毒过程，破坏细胞修复并实现细胞成分的靶向损伤; 3）在设计和测试用于发展中国家的新型UV-LED器件的过程中，包括高中研究实习生、本科生和研究生。该项目将使用定制设计的LED光反应器，一套基于电子自旋共振光谱的科学自由基表征技术，以及微生物测定来阐明细胞破坏的潜在机制。便携式智能UV-LED设备将使用Arduino微控制器来控制脉冲频率和占空比。总之，这些改进将为可持续水处理、水再利用和使用点技术的下一次飞跃铺平道路。这项研究的成功完成将有可能有助于相关领域的基础科学进步，如聚合物固化和光刻。该研究将与STEM教育和推广工作紧密结合，以培养和鼓励下一代水科学和技术领导者。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。