EAGER: CAS-MNP: Laboratory Radiation Chemistry Methods to Induce Rapid Aging of Microplastics in Water to Assess Fundamental Chemical Reactivity Changes

EAGER：CAS-MNP：实验室辐射化学方法诱导水中微塑料快速老化，以评估基本化学反应性变化

基本信息

批准号：
2035499
负责人：
Julie Peller
金额：
$ 29.91万
依托单位：
Valparaiso University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-09-01 至 2023-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2035499&HistoricalAwards=false
关键词：
EAGER CAS MNP Laboratory Radiation

项目摘要

The Division of Chemistry supports Professor Julie Peller at Valparaiso University and Professor Stephen Mezyk at the California State University at Long Beach with this award. They study microplastics, which are tiny fragments of plastic waste and can be found in our oceans, lakes, and other surface waters around the world. Since plastic materials are extremely stable, much of this pollution has resided in the water for many decades, where it undergoes changes very slowly. However, these changes are not well understood, and may be harmful to ecosystems and human health. This project studies the long-term changes of microplastics in water to determine the details of the chemical changes and the level of hazard created from their slow breakdown. This is done in the laboratory by using high energy radiation sources, which simulate similar weathering changes in nature but can be done in much shorter time. The project provides research opportunities for multiple undergraduate students at both institutions and the results are integrated into classes. Information on this topic is of high societal relevance and is being communicated to the public. The natural decomposition of microplastic in water is very slow, which makes it difficult to determine chemical reaction rates and mechanisms of the reactive radicals involved. To make such studies feasible, Professor Julie Peller and Professor Stephen Mezyk use ionizing radiation techniques to create reactive radicals in water rapidly (in hours) and reproducibly. This process mimics the impacts of long-term (years) natural, radical-based reactions occurring in marine and freshwater environments and allows the fundamental chemical reactivity of microplastics with these radicals to be determined quantitatively. They also study the surface and adsorption properties of transformed (aged) microplastics and compare to those of new materials. The data lead to a better understanding of the risks of microplastics in the natural environment.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.

化学系支持瓦尔帕莱索大学的 Julie Peller 教授和加州州立大学长滩分校的 Stephen Mezyk 教授获得该奖项。他们研究微塑料，这是塑料废物的微小碎片，可以在我们的海洋、湖泊和世界各地的其他地表水中找到。由于塑料材料极其稳定，大部分污染物已在水中滞留了数十年，其变化非常缓慢。然而，这些变化尚未得到充分理解，并且可能对生态系统和人类健康有害。该项目研究水中微塑料的长期变化，以确定化学变化的细节以及其缓慢分解产生的危害程度。这是通过使用高能辐射源在实验室中完成的，它模拟自然界中类似的风化变化，但可以在更短的时间内完成。该项目为两个机构的多名本科生提供研究机会，并将结果纳入课堂。有关该主题的信息具有很高的社会相关性，正在向公众传播。微塑料在水中的自然分解非常缓慢，这使得很难确定化学反应速率和所涉及的反应自由基的机制。为了使此类研究变得可行，Julie Peller 教授和 Stephen Mezyk 教授使用电离辐射技术在水中快速（数小时）且可重复地产生活性自由基。该过程模拟了海洋和淡水环境中发生的长期（数年）自然自由基反应的影响，并允许定量确定微塑料与这些自由基的基本化学反应性。他们还研究了转化（老化）微塑料的表面和吸附特性，并与新材料进行了比较。这些数据有助于更好地了解微塑料在自然环境中的风险。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（2）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

The Reactivity of Polyethylene Microplastics in Water under Low Oxygen Conditions Using Radiation Chemistry

利用辐射化学研究低氧条件下聚乙烯微塑料在水中的反应性

DOI：
10.3390/w13213120
发表时间：
2021-11-05
期刊：
Water
影响因子：
3.4
作者：
J. Peller;S. Mezyk;Sarah Shidler;Joe Castleman;Scott Kaiser;Gregory P. Horne
通讯作者：
Gregory P. Horne

Facile nanoplastics formation from macro and microplastics in aqueous media

在水介质中由宏观和微观塑料轻松形成纳米塑料

DOI：
10.1016/j.envpol.2022.120171
发表时间：
2022-11
期刊：
Environmental Pollution
影响因子：
8.9
作者：
Peller, Julie R.;Mezyk, Stephen P.;Shidler, Sarah;Castleman, Joe;Kaiser, Scott;Faulkner, Richard F.;Pilgrim, Corey D.;Wilson, Antigone;Martens, Sydney;Horne, Gregory P.
通讯作者：
Horne, Gregory P.