Heavy metals in water, sediments and submerged macrophytes in ponds around the Dianchi Lake, China

被引:109
|
作者
Wang, Zhixiu [1 ,2 ]
Yao, Lu [1 ,2 ]
Liu, Guihua [1 ]
Liu, Wenzhi [1 ]
机构
[1] Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China
[2] Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
Enrichment factor; Eutrophication; Heavy metals; Hyperaccumulator; Lead; LAND-USE; RISK-ASSESSMENT; SPATIAL-DISTRIBUTION; AQUATIC ECOSYSTEMS; RIVER; POLLUTION; TOXICITY; BIOACCUMULATION; EUTROPHICATION; INVERTEBRATES;
D O I
10.1016/j.ecoenv.2014.06.002
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Through retaining runoff and pollutants such as heavy metals from surrounding la. ndscapes, ponds around a lake play an important role in mitigating the impacts of human activities on lake ecosystems. In order to determine the potential for heavy metal accumulation of submerged macrophytes, we investigated the concentrations of 10 heavy metals (i.e., As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) in water, sediments, and submerged macrophytes collected from 37 ponds around the Dianchi Lake in China. Our results showed that both water and sediments of these ponds were polluted by Pb. Water and sediments heavy metal concentrations in ponds received urban and agricultural runoff were not significantly higher than those in ponds received forest runoff. This result indicates that a large portion of heavy metals in these ponds may originate from atmospheric deposition and weathering of background soils. Positive relationships were found among heavy metal concentrations in submerged macrophytes, probably due to the coaccumulation of heavy metals. For most heavy metals, no significant relationships were found between submerged macrophytes and their water and sediment environments. The maximum concentrations of Cr, Fe and Ni in Ceratophyllum demersum were 4242, 16,429 and 2662 mg kg(-1), respectively. The result suggests that C demersum is a good candidate species for removing heavy metals from polluted aquatic environments. (C) 2014 Elsevier Inc. All rights reserved.
引用
收藏
页码:200 / 206
页数:7
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