Distribution Characteristics, Concentrations, and Sources of Cd and Pb in Laoxiawan Channel Sediments from Zhuzhou, China

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• 作者：Wen-wen Chen ; Jian-xin Zhang…
• 刊名：Bulletin of Environmental Contamination and Toxicology
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：96
• 期：6
• 页码：797-803
• 全文大小：848 KB
• 刊物主题：Pollution, general; Environmental Health; Ecotoxicology; Soil Science & Conservation; Environmental Chemistry; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution;
• 出版者：Springer US
• ISSN：1432-0800
• 卷排序：96

文摘

Twenty sediment cores encompassing surface (0–20 cm) and deeper (50–60 cm) sediment layers were retrieved from the 3000 m-long Laoxiawan Channel, which receives industrial effluents from Zhuzhou City (China). Analytical results showed that cadmium (Cd) concentrations ranged between 115.7–1126.7 and 108.8–2059.3 mg/kg while lead (Pb) values ranged between 234–3000 and 145–4292 mg/kg in the surface and bottom sediments, respectively. The results also indicated that high levels of Cd and Pb were present in the vicinity of the channel mouth and confluence area. Indices for potential ecological risk and geo-accumulation were used to evaluate the environmental effects and intensity of heavy metal pollution over time. High concentrations of Cd and Pb in the bottom sediments of Laoxiawan Channel were mainly associated with wastewater discharge (106 m3/year). Thus, the Laoxiawan Channel may be an important metal contaminant source for the Xiang River.KeywordsCdPbLaoxiawan Channel sedimentsPotential ecological risk indexGeo-accumulation index