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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Phytoaccumulation of heavy metals (Pb, Zn, and Cd) by 10 wetland plant species under different hydrological regimes
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Phytoaccumulation of heavy metals (Pb, Zn, and Cd) by 10 wetland plant species under different hydrological regimes

机译：在不同水文制度下，10湿地植物物种的重金属（Pb，Zn和Cd）的植物沉积

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摘要

Wetland plants have been widely used in constructed wetlands to remove metal contaminants from water and soil. This study aimed to investigate radial oxygen loss (ROL) rate, metal (Pb, Zn, and Cd) uptake, Fe plaque formation, and their relationships in a pot trial with 10 emergent wetland plant species grown in metal-contaminated soil under flooded and non-flooded conditions. The results showed that biomass, ROL rates, metal (Pb, Zn, and Cd) uptake, and Fe plaque formation on root surfaces and in the rhizospheres of the wetland plant species were remarkably higher under flooded conditions than under non-flooded conditions. Generally, flooding mainly increased metal accumulation in the roots and Fe plaque on the root surface of wetland plant species. The wetland plant species with higher ROL rates had higher biomass, Fe plaque formation and metal adsorption on the roots and in the rhizospheres under flooded conditions. These results suggest the wetland plant species with higher ROL rates, biomass and metal accumulation ability, e.g. C. alternifolius, has the potential for use in phytoremediation of metal-contaminated wetlands. (C) 2017 Elsevier B.V. All rights reserved.
机译：湿地植物已广泛用于建造的湿地中，以除去水和土壤的金属污染物。本研究旨在研究径向氧气损失（ROL）速率，金属（Pb，Zn和Cd）摄取，Fe斑块在洪水和洪水污染土壤中生长的11种营养湿地植物物种的锅试验中的关系非洪水条件。结果表明，在根表面和根表面上和湿地植物物种的脱菱体上的生物质，ROL速率，金属（Pb，Zn和Cd）摄取和Fe斑块在湿地植物物种中的脱菱面积比未淹没条件下的洪水状况显着更高。一般来说，洪水主要增加了湿地植物物种根表面上的根部和Fe斑块的金属积累。 ROL率较高的湿地植物物种具有更高的生物质，Fe斑块形成和根部的金属吸附，在洪水状况下的根茎中。这些结果表明ROL率较高的湿地植物物种，生物量和金属累积能力，例如， C. lexifoLius，具有用于金属污染的湿地的植物修复的可能性。 （c）2017 Elsevier B.v.保留所有权利。

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