水体甲基汞光化学降解研究进展

Research Progresses on Methylmercury Photodegradation in Water Body

甲基汞(MMHg)是毒性极强的汞形态,具有生物累积和生物放大效应,对人类及食鱼生物造成极大的健康隐患。因此,对水体中MMHg的环境化学行为的研究已是迫在眉睫。目前,国内外已有少量研究探讨了MMHg的光化学行为,但对其反应机制、产物、影响因素等仍有部分学者得到不同的结论,甚至出现了相搏的结论。本文综述了近年来MMHg光降解的研究现状,总结了其产物的变化特征以及研究过程中存在的限制条件,并对今后的研究工作做了相关展望。

Methylmercury is a highly mephitical form of mercury. It has bioaccumulation and biomagnification result in high health risk to human and piscivorous biology. Consequently, it is important to research the environmental geochemical behavior of methylmercury. Now photochemical behavior of methylmercury is studied by a few scholars at home and abroad. But through the degradation mechanism, influence factors of products, there are still some scholars get different conclusions even the conflicting conclusions. The research ＂status of MMHg photodegradation recently was reviewed, the limit conditions for the existence of the product reflected the characteristics and research process were summed up, the questions of current research were pointed out, and the direction and focus of the researching methylmercury were proposed. The characteristics of transformation and restrictions reflected by products was summarized, and the future research was highlighted.