Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China.
School of Geographic and Environmental Sciences, Tianjin Normal University, Tianjin 300387, China.
Int J Environ Res Public Health. 2018 Dec 14;15(12):2857. doi: 10.3390/ijerph15122857.
We investigated the concentrations of 10 heavy metals in , , , and 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 , , and and V in 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.
我们研究了太湖、滇池、洱海和抚仙湖中 10 种重金属的浓度，以评估它们对重金属的生物积累能力及相关影响因素。Cu、Cr、Mn、Ni、Zn、Co、Pb 和 V 的富集因子（EF）值均大于 2.0，表明沉积物中存在中度至重度污染。、、和 中的大部分 Ti、V、Cr、Mn 和 Ni 以及 中的 V 均处于植物的超标/毒性水平，但高于正常水平。尽管本研究中没有水生植物被鉴定为超富集植物，但在太湖中发现的水生植物中的重金属浓度高于以往的其他研究。水生植物中的重金属，尤其是其茎中的重金属，似乎与水和沉积物中的金属比与浮叶植物中的金属更为密切相关。所有植物的茎与叶中金属的比值范围为 0.2 至 25.8，表明植物器官具有不同的积累能力。这些发现有助于将水生沉水植物应用于中度污染湖泊中重金属的去除。
