Author:
Sun Wen,Yang Ke,Li Risheng,Chen Tianqing,Xia Longfei,Sun Xubo,Wang Zhao
Abstract
AbstractShahe Reservoir of Northern Canal Basin was selected as the study area. Nineteen surface (0~20 cm) sediment samples and three sediment core samples were collected to analyze the spatial distribution characteristics of As, Cd, Cu, Mn, Pb and Zn in the sediments. The geo-accumulation index, potential ecological risk index and risk assessment code were used to evaluate heavy metal pollution, as well as its potential risk was analyzed according to the speciation of heavy metals. Results showed that the average enrichment factors of heavy metals compared to the background value in soil of Beijing were ranked at the order as the point source pollution area > the central area of the reservoir > the downstream area of the reservoir > the Nansha River > the upstream area of the reservoir > the Beisha River, namely, 2.57 times, 2.06 times, 1.97 times, 1.95 times, 1.87 times and 1.85 times, respectively. The sediment core samples in the central area of the reservoir and the inlet of the Beisha River showed a trend of increasing firstly and then decreasing with the change of depth. Pollution assessment results showed that sediment was moderately contaminated or moderately to strongly contaminated by As, but the other heavy metals were not polluted or lightly polluted. The potential ecological risk index of all sampling sites was less than 150, showing a low ecological risk. As Cr and Cu were mainly in the speciation of residues, with low bioavailability. Although the content of Mn and Zn were low, they showed high bioavailability. Based on correlation analysis and principal component analysis, it was speculated that the sources of various heavy metal pollution in the sediment were similar, which were possibly input from the external wastewater. The heavy metals in sediment were positively related to nutrients and organic matter, indicating that all of them were mostly from the same point polluted sources.
Publisher
Springer Science and Business Media LLC
Reference37 articles.
1. Xu, X. W. et al. Investigation and evaluation of water environment in the North Canal. Haihe Water Conserv. 2, 14–15 (2009).
2. Facchinelli, A., Sacchi, E. & Mallen, L. J. Multivariate statistical and GIS-based approach to identify heavy metal sources in soils. Environ. Pollut. 114(3), 313–324 (2001).
3. Chen, J. et al. Eco-environment of reservoirs in China. Phys. Geogr. Earth Environ. 42(3), 1–17 (2018).
4. Ding, H. J. Analysis of Heavy Metal Pollution in Sediments in the North Canal Basin (Capital Normal University, Beijing, 2009).
5. Liu, G. et al. Concentration distribution and risk index of heavy metals in sediments of Chaohu Lake. Environ. Sci. Technol. 41(1), 376–380 (2018).
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献