Journal
WATER
Volume 11, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/w11122544
Keywords
remote lake; atmospheric pollution; Lake Dali; ecological risk; lake sediment
Categories
Funding
- National Natural Science Foundation of China [41790423]
- Youth Innovation Promotion Association of the Chinese Academy of Sciences [2017364]
- Jiangsu Postdoctoral Science Foundation [2018K148C]
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Potentially harmful trace element (PHTE) pollution in lakes has important implications for regional management in North China, yet is seldom investigated. Surface sediments from 13 sites in Lake Dali were collected for PHTE analysis. Combined with the enrichment factor, potential ecological risk index, and multivariate statistical analysis, the spatial distribution and ecological risk of the pollutants were studied. The results showed that the contamination levels of As, Cd, Cr, Cu, Ni, Pb, and Zn were minor to moderate. Cd, Cr, Cu, Ni, Zn, and part of Pb pollution were mainly attributed to atmospheric deposition with the development of industry in North China, and As pollution resulted from the agricultural use of chemical fertilizers and As-containing pesticides. For the overall lake, the southwest part requires the most management, and targeted measures should be tailored to mitigate the ecological risk of PHTE pollution.
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