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首页> 外文期刊>Environmental Pollution >Woody biomass phytoremediation of contaminated brownfield land
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Woody biomass phytoremediation of contaminated brownfield land

机译：污染棕地的木质生物量植物修复

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Economic and environmental regeneration of post-industrial landscapes frequently involves some element of re-afforestation or tree planting. We report field trials that evaluate whether woody biomass production is compatible with managing residual trace element contamination in brownfield soils. Large-scale mapping of contamination showed a heterogenous dispersion of metals and arsenic, and highly localised within-site hotspots. Yields of Salix, Populus and Alnus were economically viable, showing that short-rotation coppice has a potentially valuable role in community forestry. Mass balance modelling demonstrated that phytoextraction potentially could reduce contamination hotspots of more mobile elements (Cd and Zn) within a 25-30-year life cycle of the crops. Cd and Zn in sterns and foliage of Salix were 4-13 times higher than EDTA-extractable soil concentrations. Lability of other trace elements (As, Pb, Cu, Ni) was not increased 3 years after planting the coppice; woody biomass may provide an effective reduction of exposure (phytostabilisation) to these less mobile contaminants. (c) 2005 Elsevier Ltd. All rights reserved.
机译：后工业景观的经济和环境再生经常涉及重新造林或植树的某些因素。我们报告了田间试验，以评估木质生物量的生产是否与管理棕壤中残留的微量元素污染相适应。大规模的污染分布图显示了金属和砷的异质分散，并且高度集中于现场热点。柳树，胡杨和Al木的产量在经济上是可行的，这表明短轮伐的小灌木林在社区林业中具有潜在的宝贵作用。质量平衡模型表明，在作物的25-30年的生命周期内，植物提取法可能会减少更多移动元素（镉和锌）的污染热点。柳树尾部和叶片中的Cd和Zn比EDTA提取的土壤浓度高4-13倍。种植小灌木林后3年，其他微量元素（砷，铅，铜，镍）的耐性并未增加；木质生物质可以有效减少这些移动性较小的污染物的暴露（植物稳定作用）。 （c）2005 Elsevier Ltd.保留所有权利。

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