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Open AccessArticle

Heavy Metals Distribution, Sources, and Ecological Risk Assessment in Huixian Wetland, South China

1
College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
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Guangxi Key Laboratory of Environmental Pollution Control and Technology, Guilin University of Technology, Guilin 541004, China
3
Coordinated Innovation Center of Water Pollution Control and Water Security in Karst Area, Guilin University of Technology, Guilin 541004, China
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College of Tourism and Landscape Architecture, Guilin University of Technology, Guilin 541004, China
5
Department of Applied Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16521 Prague, Czech Republic
*
Authors to whom correspondence should be addressed.
Water 2020, 12(2), 431; https://doi.org/10.3390/w12020431
Received: 30 November 2019 / Revised: 26 January 2020 / Accepted: 3 February 2020 / Published: 6 February 2020
This research has focused on the source identification, concentration, and ecological risk assessment of eight heavy metals in the largest karst wetland (Huixian) of south China. Numerous samples from superficial soil and sediment within ten representative landuse types were collected and examined, and the results were analyzed using multiple methods. Single pollution index (Pi) results were underpinned by the Geoaccumulation index (Igeo) method, in which Cd was observed as the priority pollutant with the highest contamination degree in this area. As for the most polluted landuse type, via applying Nemerow’s synthetical contamination index (PN) and Potential ecological risk index (RI), the river and rape field posed the highest ecological risks, while moderate for the rest. To quantify the drivers of the contaminants, a principal component analysis (PCA) was carried out and weathering of the watershed’s parent carbonate rocks was found to be the main possible origin, followed by anthropogenic sources induced by agricultural fertilizer. Considering the impacts of these potentially toxic elements on public health, the results of this study are essential to take preventive actions for environmental protection and sustainable development in the region. View Full-Text
Keywords: heavy metals; karst wetland; soil contamination; risk assessment heavy metals; karst wetland; soil contamination; risk assessment
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MDPI and ACS Style

Huang, L.; Rad, S.; Xu, L.; Gui, L.; Song, X.; Li, Y.; Wu, Z.; Chen, Z. Heavy Metals Distribution, Sources, and Ecological Risk Assessment in Huixian Wetland, South China. Water 2020, 12, 431.

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