一类新的环境有害物质——环境持久性自由基(EPFRs)的研究进展

环境持久性自由基(Environmental Persistent Free Radicals,EPFRs)是相对传统关注的短寿命自由基而提出的.EP-FRs在环境中广泛存在,具有更强的环境持续性和毒性,更容易引发肺部和心血管疾病.本文概述了EPFRs的产生机理、存在介质及其危害,尤其强调了对在土壤介质中和环境纳米材料(物质)在光催化过程产生的EPFRs开展研究的重要性,同时介绍了电子顺磁性共振(EPR)等主要检测方法,展望研究前景与方向,并更深层次的认识这类新的有机污染物的环境风险.

The Research Progress on A New Type Harmful Matter-Environmental Persistent Free Radicals (EPFRs)

Compared with traditional short-life free radicals,Environmental Persistent Free Radicals(EPFRs) emerge in the reaction processes between transition metal elements and organic matters,which have paramagnetic stability and high reactivity.The EPFRs have half-lives of minutes to several hours,which induce more oxidative stress in organisms.In this paper,the formation mechanism of EPFRs,its existent and harm were summarized.Main test methods such as Electron Paramagnetic Resonance(EPR) were introduced and the future research directions on EPFRs also were suggested.Researches indicated that EPFRs not only exist widely in the environment,for instance,in the atmosphere,soil sediment suspension particles and natural organic matters,etc.,but also have powerful environmental persistence and toxicity,and that EPFRs are prone to trigger pulmonary and cardiovascular diseases.The importance of studying the EPFRs generated by soils and nano-materials in the processes of photocatalytic reactions was also specially emphasized.The research on this new type organic pollutant,EPFRs,will help to better understand of their environmental risks