School of Metallurgy and Environment , Central South University , Changsha 410083 , China.
CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , China.
Environ Sci Technol. 2019 May 7;53(9):4683-4694. doi: 10.1021/acs.est.9b01103. Epub 2019 Apr 25.
Dissolved organic matter (DOM) exists ubiquitously in environments and plays critical roles in pollutant mitigation, transformation, and organic geochemical cycling. Understanding its properties and environmental behaviors is critically important to develop water treatment processes and environmental remediation strategies. Generalized two-dimensional correlation spectroscopy (2DCOS), which has numerous advantages, including enhancing spectral resolution and discerning specific order of structural change under an external perturbation, could be used as a powerful tool to interpret a wide range of spectroscopic signatures relating to DOM. A suite of spectroscopic signatures, such as UV-vis, fluorescence, infrared, and Raman spectra that can be analyzed by 2DCOS, is able to provide additional structural information hiding behind the conventional one-dimensional spectra. In this article, the most recent advances in 2DCOS applications for analyzing DOM-related environmental processes are reviewed, and the state-of-the-art novel spectroscopic techniques in 2DCOS are highlighted. Furthermore, the main limitations and requirements of current approaches for exploring DOM-related environmental processes and how these limitations and drawbacks can be addressed are explored. Finally, suggestions and new approaches are proposed to significantly advance the development of 2DCOS in analyzing the properties and behaviors of DOM in natural and engineered environments.
溶解有机质（DOM）广泛存在于环境中，在污染物的缓解、转化和有机地球化学循环中起着关键作用。了解其性质和环境行为对于开发水处理工艺和环境修复策略至关重要。广义二维相关光谱（2DCOS）具有增强光谱分辨率和辨别外部扰动下特定结构变化顺序等众多优点，可作为一种强大的工具，用于解释与 DOM 相关的广泛光谱特征。一系列光谱特征，如 UV-vis、荧光、红外和拉曼光谱，可通过 2DCOS 进行分析，能够提供隐藏在传统一维光谱背后的额外结构信息。本文综述了 2DCOS 在分析与 DOM 相关的环境过程中的最新应用进展，强调了 2DCOS 中最新的新型光谱技术。此外，还探讨了当前探索与 DOM 相关的环境过程的方法的主要局限性和要求，以及如何解决这些局限性和缺点。最后，提出了建议和新方法，以显著推进 2DCOS 在分析天然和工程环境中 DOM 的性质和行为方面的发展。
