Heavy metals contamination and accumulation in submerged macrophytes in an urban river in China

International Journal of Phytoremediation
Guangqiu LuYuanqing Zhou

Abstract

Deteriorating urban water quality has attracted considerable attention in China. We investigated the contamination levels and distribution of heavy metals (As, Cd, Cu, Ni, Pb, and Zn) in Yuxi River water and sediments, and assessed the heavy metal accumulation capability of five species of submerged macrophytes: Vallisneria natans (Lour.) Hara, Potamogeton pectinatus L., Hydrilla verticillata (L. f.) Royle, Myriophyllum spicatum L., and Potamogeton crispus L. Samples were collected from upstream and downstream locations in different season. The results showed that the levels of heavy metals in the downstream areas were higher than in the upstream areas. Heavy metal concentrations in the river water during the dry seasons were higher than those during the rainy seasons, and the opposite results appeared in sediments and submerged macrophytes. In general, the river was slightly contaminated by heavy metals, and the concentrations of Pb and Ni in this river should serve as a warning, while Cd and Zn pollution in the sediments desperately needs to be removed. Furthermore, Potamogeton pectinatus L. showed a higher accumulation capacity for these metals among the five native submerged macrophytes and could be defined as a hyperaccumu...Continue Reading

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Citations

Dec 19, 2018·International Journal of Environmental Research and Public Health·Li BaiCong-Qiang Liu
Jan 2, 2020·Journal of Health & Pollution·Sandeep K PandeyDheeraj Lamba
Mar 24, 2020·Ecotoxicology and Environmental Safety·Han GuoJingliang Zhang

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