Journal of Environment Protection and Sustainable Development
Articles Information
Journal of Environment Protection and Sustainable Development, Vol.6, No.1, Mar. 2020, Pub. Date: Feb. 14, 2020
Differences Among Ten Wetland Plant Species in the Tolerances of Lead-polluted Water
Pages: 1-5 Views: 52 Downloads: 27
Authors
[01] Yuankang Liu, School of Environmental & Safety Engineering, Changzhou University, Changzhou, China.
[02] Kaiqiang Chu, School of Environmental & Safety Engineering, Changzhou University, Changzhou, China.
[03] Jianguo Liu, School of Environmental & Safety Engineering, Changzhou University, Changzhou, China.
Abstract
Differences among ten wetland plant species in the tolerances of lead (Pb)-polluted water were investigated in constructed wetlands under different water Pb levels. The results presented that the toxic effects of Pb on the biomasses wetland plants varied with plant species, water Pb levels and plant organs. For most of the species, the growth of the wetland plants were not affected significantly (P > 0.05) by the water Pb level of 1.5 mg/L. But under the water Pb level of 3.0 mg/L, the plant growth was inhibited greatly for most of the species. In the ten plant species, the biomasses of aboveground parts, underground parts and whole plants were reduced by 3.58% - 22.12% (averagely 11.17%), 3.56% - 32.14% (averagely 15.29%) and 3.58% - 23.71% (averagely 12.06%) respectively by the Pb level of 3.0 mg/L, with significant reductions (P < 0.05 or 0.01) in eight species. The results indicate that water Pb level must be considered in the selection of wetland plant species for the treatment of Pb-polluted wastewater. Most of the plant species can be used in the treatment of moderate Pb-polluted water. In the treatment of severe Pb-polluted wastewater, the wetland plant species must be highly tolerant to Pb toxicity, such as Phragmites communis and Alternanthera philoxeroides in this experiment.
Keywords
Wetland Plant, Lead (Pb), Wastewater, Treatment, Tolerance
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