Spatial Distribution and Potential Ecological Risk Assessment of Heavy Metals in Soils and Sediments in Shunde Waterway, Southern China

• Published in: Huanjing kexue Vol. 37; no. 5; p. 1763
• Main Authors: Cai, Yi-min, Chen, Wei-ping, Peng, Chi, Wang, Tie-yu, Xiao, Rong-bo
• Format: Journal Article
• Language: Chinese
• Published: China 15.05.2016
• Subjects: China; Ecology; Environmental Monitoring; Estuaries; Geologic Sediments - chemistry; Industry; Metals, Heavy - analysis; Principal Component Analysis; Risk Assessment; Rivers; Soil - chemistry; Soil Pollutants - analysis; Spatial Analysis; Waste Water; Water - chemistry; Water Pollutants, Chemical - analysis
• ISSN: 0250-3301
• DOI: 10.13227/j.hjkx.2016.05.021

Environmental quality of soils and sediments around water source area can influence the safety of potable water of rivers. In order to study the pollution characteristics, the sources and ecological risks of heavy metals Zn, Cr, Pb, Cu, Ni and Cd in water source area, surface soils around the waterway and sediments in the estuary of main tributaries were collected in Shunde, and ecological risks of heavy metals were assessed by two methods of potential ecological risk assessment. The mean contents of Zn, Cr, Pb, Cu, Ni and Cd in the surface soils were 186.80, 65.88, 54.56, 32.47, 22.65 and 0.86 mg · kg⁻¹ respectively, and they were higher than their soil background values except those of Cu and Ni. The mean concentrations of Zn, Cr, Pb, Cu, Ni and Cd in the sediments were 312.11, 111.41, 97.87, 92.32, 29.89 and 1.72 mg · kg⁻¹ respectively, and they were higher than their soil background values except that of Ni. The results of principal component analysis illustrated that the main source of Cr and Ni in soils