Levels and Potential Ecological Risk Assessment of Heavy Metals in Sediments of Longjiang Wetland in Binzhou City

• 作者: LI Luzhen LI Xiaomeng MENG Xiangfang WANG Zihao ZHANG Zaiwang
• 来源期刊: 景观研究:英文版
• 学科: 经济
• 关键词: HEAVY metal Longjiang WETLAND SEDIMENT Potential ECOLOGICAL risk assessment
• 年，卷（期）: 2019,（6）
• 页码范围: 37-39
• 页数: 3页
• 分类号: F42

摘要

Wetland is a unique habitat with great biodiversity and important ecological functions between land and water on the earth. With the irrational utilization of wetland resources, the ecological destruction and pollution of wetland are becoming more and more serious. To evaluate the pollution of heavy metals in the sediments of Longjiang Wetland in Binzhou City, chromium(Cr), copper(Cu), zinc(Zn), cadmium(Cd) and lead(Pb) were measured by inductively coupled plasma mass spectrometry. Concentrations of Cr, Cu, Zn, Cd and Pb in the sediments were 5.3–13.6, 5.6–15.0, 16.6–33.0, 0.1–0.4 and 7.9–24.9 mg/kg dry weight, respectively. The concentrations of heavy metals in Longjiang Wetland was lower than soil background values of Shandong Province and in lower level compared with those reported in sediments/soils of wetlands in some other locations. Based on geo-accumulation index(Igeo), Cr, Cu, Zn and Pb showed low levels of contamination at all stations, while Cd was observed at a moderate pollution degree. Potential ecological risk factor(E_r~i) and risk index(RI) values showed low ecological risk of heavy metals in sediments of the wetland.