水环境中溶解性有机物溯源分析及分子结构表征概述

溶解性有机物(DOM)是地球上最大的碳基化合物反应性储层之一,涉及各种生物地化反应并且在污染物溶解度、毒性、生物利用度、流变性和分布中发挥重要作用。本文介绍了当前用于表征水环境中DOM的策略和工具,探讨了当前研究在技术限制(预处理过程复杂、仪器分辨率低、数据处理困)、结构复杂性、结构多变性等方面存在的诸多局限性。分析认为:已有研究主要侧重于溯源分析和分子结构特征解析,未来研究应该在不同的结构层面和角度开展,加强多学科融合、数据库创建、对照实验和协同工作。

Source tracking and molecular structure characterization of dissolved organic matter in aqueous environment

Dissolved organic matter(DOM)is one of the largest reactive reservoirs of carbon-based compounds on earth,which is related to various biochemical and geochemical reactions and plays an important role in the solubility,toxicity,bioavailability,rheology and distribution of pollutants.Current strategies and tools for characterizing DOM in aquatic environment were introduced.The limitations of current research were discussed in terms of technology(complex pre-treatment process,low-resolution instrument and data handling difficulties),complexity and variability of structure.It is considered that the existing research mainly focuses on traceability and molecular structure characterization.Future research should be carried out at different levels and angles and enhanced in the aspects of multi-disciplinary integration,database creation,controlled experiments and collaborative works.