Traceability of lake pollution based on aqueous fluorescence fingerprint method: A case study of Lake Gehu, Taihu Basin

被引：0
|
作者：
Chao B. [1 ,3 ]
Cai Y. [2 ]
Xu X. [1 ,2 ]
Li M. [2 ]
Hu G. [3 ]
机构：
[1] Changzhou Academy of Environmental Science, Changzhou
[2] Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing
[3] Jiangsu Environmental Protection Group Co., Ltd, Jiangsu Changhuan Environmental Technology Co., Ltd, Changzhou
来源：
Hupo Kexue/Journal of Lake Sciences | 2023年 / 35卷 / 04期
关键词：
aqueous fluorescence fingerprinting method; Lake Gehu; spatio-temporal correlation; spatio-temporal impact characteristics; Traceability of water pollution; types of pollution sources;
D O I：
10.18307/2023.0425
中图分类号：
学科分类号：
摘要：
With the rapid development of social economy and urbanization process, ihe problems of water environmental pollution is become increasingly prominent for lakes, aggravating the degradation and loss of the original lake functions. Therefore, pollution control has become a necessary condition for the restoration and sustainable development of lake functions. However, how to accurately identify the sources of pollution is an important prerequisite for pollution control. For this purpose, this paper takes Lake Ce-hu as an example, and adopts an emerging technology called aqueous fluorescence fingerprint method to trace the sources of lake pollution. In 2021, the water instantaneously drained off from 70 agricultural, 13 domestic and 3 industrial outfalls around Lake Gehu was collected to build the fluorescence fingerprint database of pollution sources. The lake water samples at 8 sites were collected for consecutive 12 months as the analysis samples of fluorescent components of Lake Cehu. Through parallel factor analysis, 4 kinds of pollution source fingerprints and 5 kinds of fluorescent components were obtained. Based on fluorescence similarity (Tucker Congruence Coefficient) analysis, it was further determined that Lake Gehu was mainly affected by the cropping non-point pollution source, domestic pollution source, industrial pollution source. In addition, strong correlation among fluorescence intensity, chlorophyll-a concentration and algal density indicated that the algal reproduction activity could also make an impact on Lake Gehu. From the perspective of spatio-temporal characteristics in the impact of different pollution sources on Lake Gehu, the cropping non-point pollution source mainly affected the western and central regions of Lake Cehu in spring and summer. The domestic pollution source mainly affected the western and northern regions of Lake Gehu in summer and winter. The industrial pollution source mainly affected the western region of Lake Gehu in specific months (March to April, October to December). The algal reproduction activity mainly affected Lake Cehu in summer. The result of spatio-temporal correlation analysis among fluorescent components and water quality parameters showed that the cropping non-point pollution source and total nitrogen, total phosphorus, the domestic pollution source and ammonia nitrogen, organic matter parameters (BOD5, CODCr, CODMn), the algal reproduction activity and ehlorophyll-M, algal density, the industrial pollution source and Cu, Zn showed strong correlations respectively, indicating the aqueous fluorescence fingerprint method had the potential to become a reliable tool in tracing pollution sources of water quality for lakes. The research results can provide no I only valuable pollution source information for local environmental management department of Lake Gehu, but also technical reference for other lakes to carry out research on traceability of pollution. © 2023 Science Press. All rights reserved.
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页码：1330 / 1342
页数：12
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