US EPA

7486074 

Journal Article 

贵州草海湿地溶解性有机物的光谱特征及其与PFASs的相关性分析 

Peng, J; Wang, Y; Lin, S; Guo, F; Li, J; Yang, H 

2020 

Chk 

Huanjing Kexue Yanjiu / Research of Environmental Sciences
ISSN: 1001-6929 

Editorial Board, Research of Environmental Sciences 

33 

4 

885-892 

Chinese 

10.13198/j.issn.1001-6929.2019.07.18 

Dissolved organic matter (DOM) has good environmental indications, can track the source of exogenous pollutants and affect their migration, transformation and bio-availability. Aiming at the aquatic environment of the typical karst plateau wetland in Guizhou, the fluorescence characteristics of DOM in the surface water of Caohai Wetland under special geological background were studied by three-dimensional fluorescence spectrometry combined with parallel factor analysis. The occurrence characteristics of PFASs were analyzed by ultra high-performance liquid chromatography tandem mass spectrometry. The relationship between DOM and PFASs as well as its influence on the environmental behavior of PFASs were discussed. The results showed that: (1) Four fluorescence components, including humic-like substances, long-band humic, fulvic acid-like substances and tryptophane-like substances, were detected in Caohai Wetland, which accounted for 48.6%, 23.6%, 22.9% and 4.9% to the total burden, respectively. Among them, the total contribution of humic-like substances was as high as 72.2%. Affected by agricultural production and human activities, a decreasing trend of the total fluorescence intensity were showed from the inlet to the outlet with slightly higher intensity in the center area. (2) A total of 12 PFASs were detected in the surface water of the Caohai Wetland. The ρ(PFASs) was 233.18 ng/L with the average concentration of 19.43 ng/L. PFBA was the most predominant compound. Point source such as domestic sewage and agricultural wastewater might be the main potential sources of pollution in the entry area of the Caohai Wetland. (3) The results of correlation analysis showed that the intensity values of all fluorescent components were negatively correlated with PFBS. Tryptophane-like substances was negatively correlated with PFHpA but positively correlated with PFTriDA. The study indicated that the aquatic environment of the Caohai Wetland was at high degree of humidification, which posed obvious exogenous characteristics. Twelve kinds of PFASs were detected in the Caohai Wetland. The correlation between DOM and PFASs were preliminary revealed. Considering the differences of chemical structures and aquatic property, more data are warranted in future study. © 2020, Editorial Board, Research of Environmental Sciences. All right reserved. 

Caohai Wetland; Correlation; Dissolved organic matter (DOM); Fluorescence property; Per-and polyfluoroalkyl substances (PFASs)