Heavy Metal Accumulation in Common Aquatic Plants in Rivers and Lakes in the Taihu Basin

被引:48
作者
Bai, Li [1 ,2 ]
Liu, Xiao-Long [1 ,2 ]
Hu, Jian [3 ]
Li, Jun [1 ]
Wang, Zhong-Liang [1 ,2 ]
Han, Guilin [4 ]
Li, Si-Liang [5 ]
Liu, Cong-Qiang [5 ,6 ]
机构
[1] Tianjin Normal Univ, Tianjin Key Lab Water Resources & Environm, Tianjin 300387, Peoples R China
[2] Tianjin Normal Univ, Sch Geog & Environm Sci, Tianjin 300387, Peoples R China
[3] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
[4] China Univ Geosci Beijing, Sch Sci Res, Beijing 100083, Peoples R China
[5] Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
[6] Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Guizhou, Peoples R China
基金
中国国家自然科学基金;
关键词
aquatic plants; heavy metals; Taihu Lake; bioaccumulation capability; SUBMERGED MACROPHYTES; URBAN RIVER; WATER; BIOACCUMULATION; CONTAMINATION; SEDIMENTS; TRANSLOCATION;
D O I
10.3390/ijerph15122857
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
We investigated the concentrations of 10 heavy metals in Potamogeton malaianus, Nymphoides peltata, Eichhornia crassipes, and Hydrilla verticillata to evaluate their potential to bioaccumulate heavy metals and related influencing factors in Taihu Lake. Enrichment factor (EF) values of Cu, Cr, Mn, Ni, Zn, Co, Pb, and V were above 2.0, indicating moderate to significant contamination in sediment. Most of Ti, V, Cr, Mn, and Ni in P. malaianus, E. crassipes, and H. verticillata and V in N. peltata were within excess/toxic level in plants, but higher than normal level. Even though no aquatic plants in this study were identified as a hyperaccumulator, relatively higher concentrations in aquatic plants were found in Taihu Lake than have been found in other previous studies. Heavy metal in submerged plants, especially in their stems, seemed to be more closely related to metals in water and sediment than those in floating-leaf plants. Ratios of metals in stem versus leaves in all plants ranged from 0.2 to 25.8, indicating various accumulation capabilities of plant organs. These findings contribute to the application of submerged aquatic plants to heavy metal removal from moderately contaminated lakes.
引用
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页数:12
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