天然水体中两种主要异嗅物质的来源及迁移转化研究进展

摘要

近年来，水中嗅味问题逐渐引起关注。研究发现，天然水体中异嗅物质主要是微生物和藻类的挥发性次级代谢产物。总结了天然水体中常见的两种异嗅物质土臭素（GSM）和二甲基异莰醇（MIB）的来源及其在生物体内的合成途径。介绍了异嗅物质通过吸附、挥发、光解、生物降解等一系列作用在饮用水水源中的迁移转化以及其进入水体生物的途径。%In recent years,the issue of taste and odor(T&O)in water attracts people’s attention. Study has found that the main T&O compounds in natural waters were volatile secondary metabolite produced by microbes and algae. In this paper,the resource and biosynthesis of two main off-flavor compounds,2-methylisoborneol and geosmin(GSM), in natural aqueous matrices were reviewed. In addition,the migration and transformation of these two off-flavor com-pounds in natural water by means of absorption,volatilization,photolysis,biodegradation were introduced. The trans-fer pathway of these two compounds into aquatic life was also discussed in this paper.