Feasibility of source identification by DOM fingerprinting in marine pollution events. (December 2021)

• Record Type: Journal Article
• Authors: Jiang, Ming; Sheng, Yanqing; Tian, Chongguo; Li, Changyu; Liu, Qunqun; Li, Zhaoran
• Is Part Of: Marine pollution bulletin. Volume 173:Part B(2021)
• Publication Date: 2021-12
• Subjects: Dissolved organic matter -- Excitation-emission matrix spectrum -- Parallel factor analysis -- Marine pollution events; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2021.113060
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: Accurate source identification is the first step of pollution control in environmental emergency management, especially in marine pollution events. Dissolved organic matter (DOM) absorption and fluorescence (excitation-emission matrices, EEMs) analyses were applied to trace contaminant sources for a pollution event that occurred along the coast of Laizhou Bay, Bohai Sea. Parallel factor analysis (PARAFAC) of the EEMs identified four fluorescent components: terrestrial humic-like (C1), tryptophan-like (C2), and a mixture of terrestrial and marine humic-like (C3) and tyrosine-like (C4) components. The relationships among C1 to C4 and quality indices indicated that the DOM originated from terrestrial input and biological activity. The EEMs-PARAFAC results accompanied by the optical characteristics of DOM and fingerprinting demonstrated that the marine pollution event occurred was from enterprise emissions. The numerical simulation confirmed the reliability of EEMs-PARAFAC modeling for DOM fingerprinting of pollution sources in polluted regions. This study provided a feasible method for source recognition in marine pollution events. Graphical abstract: Unlabelled Image Highlights: Two humic-like and two protein-like components were identified. DOM fingerprints can trace marine pollution sources. The marine DOM in polluted area was verified using EEMs-PARAFAC. Numerical simulation confirmed the feasibility of DOM fingerprinting.