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Article

Identification Sources and High-Risk Areas of Sediment Heavy Metals in the Yellow River by Geographical Detector Method

by 1,2, 1,2,*, 1 and 1,2
1
School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
2
Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China
*
Author to whom correspondence should be addressed.
Academic Editors: Bommanna Krishnappan and Akintunde O. Babatunde
Water 2021, 13(8), 1103; https://doi.org/10.3390/w13081103
Received: 1 March 2021 / Revised: 20 March 2021 / Accepted: 13 April 2021 / Published: 16 April 2021
(This article belongs to the Section Water Erosion and Sediment Transport)
In order to determine the key influencing factors, risk areas, and source pathways of heavy metals in the sediment of the Yellow River, 37 samples were collected in the surface sediment (0–5 cm) of the Inner Mongolia section of the Yellow River main stream for the determination of heavy metals copper (Cu), nickel (Ni), zinc (Zn), chromium (Cr), lead (Pb), and cadmium (Cd). Based on the geographical detector model (GDM) and ArcGIS 10.2 software, this paper selected 6 heavy metals and 15 influencing factors, including 8 natural factors and 7 anthropogenic factors, to detect key influencing factors, risk areas, and sources of heavy metals. The results showed that: (1) The average contents of heavy metals Cr and Cd in the sediments exceeded the average value in soil, the world average concentration in the shales, and the first-level standard of soil environmental quality in China, and they were the main risk metals; (2) Vegetation coverage (VC) was the largest influencing factor for the spatial distribution of heavy metals in the sediment, followed by per capita income (PI), and land use type (LUT) and road network density (RD) were smaller influencing factors. The interactions of the factors were enhanced; (3) The Wuhai section for a risk area was mainly polluted by Cd and Pb, which were caused by atmospheric deposition and industrial emission. The Baotou section for a risk area was mainly polluted by Cr, which mainly originated from river transportation and industrial discharge. The conclusions can provide a scientific basis for the environmental protection and management of the different areas in the Inner Mongolia section of the Yellow River. View Full-Text
Keywords: sediment; heavy metal; geographic detector; source; risk area; Yellow River sediment; heavy metal; geographic detector; source; risk area; Yellow River
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MDPI and ACS Style

Hao, J.; Ren, J.; Fang, H.; Tao, L. Identification Sources and High-Risk Areas of Sediment Heavy Metals in the Yellow River by Geographical Detector Method. Water 2021, 13, 1103. https://doi.org/10.3390/w13081103

AMA Style

Hao J, Ren J, Fang H, Tao L. Identification Sources and High-Risk Areas of Sediment Heavy Metals in the Yellow River by Geographical Detector Method. Water. 2021; 13(8):1103. https://doi.org/10.3390/w13081103

Chicago/Turabian Style

Hao, Jianxiu; Ren, Jun; Fang, Hongbing; Tao, Ling. 2021. "Identification Sources and High-Risk Areas of Sediment Heavy Metals in the Yellow River by Geographical Detector Method" Water 13, no. 8: 1103. https://doi.org/10.3390/w13081103

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