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Spatial Distribution and Ecological Risk Assessment of Potentially Harmful Trace Elements in Surface Sediments from Lake Dali, North China

by Min Xu 1, Weiwei Sun 2,* and Rong Wang 2
1
School of Geography Science, Nanjing Normal University, Nanjing 210023, China
2
State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
*
Author to whom correspondence should be addressed.
Water 2019, 11(12), 2544; https://doi.org/10.3390/w11122544
Received: 20 October 2019 / Revised: 26 November 2019 / Accepted: 29 November 2019 / Published: 1 December 2019
(This article belongs to the Section Water Quality and Ecosystems)
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.
Keywords: remote lake; atmospheric pollution; Lake Dali; ecological risk; lake sediment remote lake; atmospheric pollution; Lake Dali; ecological risk; lake sediment
MDPI and ACS Style

Xu, M.; Sun, W.; Wang, R. Spatial Distribution and Ecological Risk Assessment of Potentially Harmful Trace Elements in Surface Sediments from Lake Dali, North China. Water 2019, 11, 2544.

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