Characteristics and risk assessment of the heavy metals in stream sediments of Heze City

XU Xiong; SUN Yan-Ting; XIAO Fang; XIAO Pei-Ping; DONG Ying-Shang; LI Min

doi:10.11720/wtyht.2022.1421

2022 Vol. 46, No. 4

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Article navigation > Geophysical and Geochemical Exploration > 2022 > 46(4): 1021-1029

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XU Xiong, SUN Yan-Ting, XIAO Fang, XIAO Pei-Ping, DONG Ying-Shang, LI Min. 2022. Characteristics and risk assessment of the heavy metals in stream sediments of Heze City. Geophysical and Geochemical Exploration, 46(4): 1021-1029. doi: 10.11720/wtyht.2022.1421

Citation:

XU Xiong, SUN Yan-Ting, XIAO Fang, XIAO Pei-Ping, DONG Ying-Shang, LI Min. 2022. Characteristics and risk assessment of the heavy metals in stream sediments of Heze City. Geophysical and Geochemical Exploration, 46(4): 1021-1029. doi: 10.11720/wtyht.2022.1421

Characteristics and risk assessment of the heavy metals in stream sediments of Heze City

1. Heze Ecological Environment Monitoring Center of Shandong Province, Heze 274000, China；
2. College of Agricultural and Biological Engineering, Heze University, Heze 274000, China

Received Date: 01 August 2021

Revised Date: 20 August 2022

Publish Date: 17 August 2022

Abstract

Abstract

This study aims to investigate the characteristics, pollution sources, and ecological risks of heavy metals in the stream sediments in Heze City, which is an important catchment area in the east route of the South-to-North Water Diversion Project. To this end, stream sediment samples were collected from 25 sites of three major river basins in Heze City, and the contents of Cu, Zn, Ni, Cr, Cd, and Pb in the samples were analyzed. Moreover, this study assessed the ecological risks of these heavy metal elements using the pollution load index (PLI), potential ecological risk index (RI), and logarithmic regression model and determined the pollution sources of these heavy metal elements through correlation and principal component analysis. The results are as follows. The contents of the six heavy metal elements in the stream sediment samples were generally higher than their background values. The Ni and Cd contents at all investigated sites exceeded their background values, especially the Cd content at 40% of the investigated sites, which was more than three times the background value. The heavy metals in the stream sediments of the three river basins are unevenly distributed. The maximum values of the six heavy metals all originated from the samples of the Zhuzhaoxin River basin, of which the PLI, RI, and toxicity ratio Y were 1.67, 123 and 0.367, respectively. These values were higher than those of the other two basins, indicating that the heavy metals in sediments of the Zhuzhaoxin River basin reach moderate pollution and have high ecological risks and potential harm to aquatic organisms. The principal component analysis shows that the petroleum refining and related chemical enterprises in industrial parks are the main contributors to the enrichment of the six heavy metal elements.
- stream sediment /
- heavy metal /
- risk assessment

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References

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