Collaborative Research: CAS: Environmentally Relevant Photoproducts of Organic UV Filters in Commercial Sunscreens

合作研究：CAS：商业防晒霜中有机紫外线过滤剂的环境相关光产品

• 批准号: 2302575
• 负责人: Leanne Powers
• 金额: $ 13.37万
• 依托单位: SUNY College of Environmental Science and Forestry
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-15 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2302575&HistoricalAwards=false
• 关键词: Collaborative; Research; CAS; Environmentally; Relevant

With support from the Environmental Chemical Sciences Program in the Division of Chemistry, Michael Gonsior, Carys Mitchelmore, Andrew Heyes and their team at the University of Maryland Center for Environmental Science (UMCES) and Leanne Powers and her team at the State University of New York College of Environmental Science and Forestry will study the photo-degradation products of commercial sunscreens and other outdoor products that contain ultraviolet (UV) filters. These compounds protect both people and materials from sun damage, but their environmental fate and risk are largely unknown. This project will evaluate changes in UV filters when exposed to sunlight, because these photochemical reactions are major pathways to degrade these chemicals, which in turn influences their environmental persistence, bioaccumulation, and toxicity to aquatic organisms. Their reaction with disinfectants used in water treatment (potable water and wastewater) will also be evaluated. A graduate student will be supported at UMCES, and undergraduate students will be recruited through the Central New York Louis Stokes Alliance for Minority Participation and the research for undergraduate (REU) program at UMCES. A summertime workshop for teachers is planned in coordination with the Calvert County Board of Education Science coordinators and teachers; accessible web content will also be produced through student educational videos.This project aims to determine the photodegradation kinetics as well as the photoproducts of the most common organic UV filters. A custom-designed photodegradation system will be implemented to allow for highly reproducible experiments, which avoids previous shortcomings. These aromatic UV filters are also suspected to form disinfection by-products (DBPs) upon treatment with chlorine. The photoproducts and DBPs produced in seawater and freshwater settings will be structurally elucidated using modern mass spectrometry approaches. Results from this project are expected to help scientists to estimate the environmental lifetimes of organic UV filters, their suspected DBP formation and photodegradation products, as well as allow for an evaluation of the role of photochemistry and chlorine disinfection in decreasing or increasing the environmental risk of these compounds to aquatic organisms.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.

在化学系环境化学科学项目的支持下，Michael Gonsior，Carys Mitchelmore，马里兰州大学环境科学中心（UMCES）的Andrew Heyes和她的团队以及纽约州立大学环境科学与林业学院的Leanne Powers和她的团队将研究商业防晒霜和其他含有紫外线（UV）过滤器。这些化合物可以保护人和材料免受阳光的伤害，但它们的环境命运和风险在很大程度上是未知的。该项目将评估紫外线过滤剂在暴露于阳光下时的变化，因为这些光化学反应是降解这些化学品的主要途径，而降解这些化学品又会影响其环境持久性、生物累积性和对水生生物的毒性。还将评估它们与水处理（饮用水和废水）中使用的消毒剂的反应。一名研究生将在UMCES获得支持，本科生将通过中央纽约路易斯斯托克斯少数民族参与联盟和UMCES的本科生研究（REU）计划招募。计划与卡尔弗特县教育委员会科学协调员和教师协调，为教师举办夏季讲习班;还将通过学生教育视频制作可访问的网络内容。该项目旨在确定最常见的有机紫外线过滤剂的光降解动力学以及光产物。一个定制设计的光降解系统将被实施，以允许高度可重复的实验，这避免了以前的缺点。这些芳香族紫外线过滤剂也被怀疑在用氯处理时形成消毒副产物（DBPs）。将使用现代质谱法对海水和淡水环境中产生的光产物和消毒副产物进行结构解析。该项目的结果有望帮助科学家估计有机紫外线过滤剂的环境寿命，其可疑的DBP形成和光降解产物，以及允许评估光化学和氯消毒在减少或增加这些化合物对水生生物的环境风险方面的作用。该奖项反映了NSF的法定使命，并被认为值得通过评估予以支持使用基金会的知识价值和更广泛的影响审查标准。