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首页> 外文期刊>Water, Air, and Soil Pollution >Macrophyte Sorption and Bioconcentration of Elements in a Pilot Constructed Wetland for Flue Gas Desulfurization Wastewater Treatment
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Macrophyte Sorption and Bioconcentration of Elements in a Pilot Constructed Wetland for Flue Gas Desulfurization Wastewater Treatment

机译：试点人工湿地烟气脱硫废水中大型植物的吸附与生物富集

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摘要

The sorption and bioconcentration of Hg, Se, and As were measured in Schoenoplectus californicus and Typha angustifolia in a pilot constructed wetland receiving wastewater inflows containing these elements at potentially hazardous levels. Results indicated that these species bioconcentrated Hg, Se, and As at factors of up to 1,911, 10,981, and 4,927, respectively. Plant tissue concentrations decreased as Hg, Se, and As were translocated from the roots to the aerial portions of the plant. Greatest element concentrations in S. californicus were found in roots, indicating that an exclusion mechanism may be responsible for element tolerance by this plant species. Greater root:shoot transfer of Hg, Se, and As was observed with T. angustifolia than with S. californicus, suggesting that element tolerance was more likely due to an internal detoxification mechanism. To completely assess ecological risks associated with the use of constructed wetlands, contaminant bioavailability for plant uptake, translocation, and bioconcentration must be considered.
机译：在试点的人工湿地中，在加利福尼亚州的Schoenoplectus californicus和香蒲中的Hg，Se和As的吸附和生物浓度进行了测量，这些湿地接受了含有潜在危险水平的这些元素的废水流入。结果表明，这些物种生物富集的Hg，Se和As分别高达1,911、10,981和4,927。随着Hg，Se和As从根部转移到植物的空中部分，植物组织浓度降低。在根中发现了加州沙门氏菌中的最大元素浓度，这表明这种植物物种的元素耐受性可能是一种排斥机制。相比于S. californicus，用铁杉（T. angustifolia）观察到更高的根：Hg，Se和As的根部转移，表明元素的耐受性更可能是由于内部的解毒机制所致。为了完全评估与使用人工湿地有关的生态风险，必须考虑污染物对植物吸收，转运和生物富集的生物利用度。

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