Phytoremediation of Heavy Metal-Contaminated Soils Using the Perennial Energy Crops Miscanthus spp. and Arundo donax L.
Phytoremediation of Heavy Metal-Contaminated Soils Using the Perennial Energy Crops Miscanthus spp. and Arundo donax L.
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DOI：
10.1007/s12155-015-9688-9
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发表时间：
2015-12-01
影响因子：
3.6
通讯作者：
Fernando, Ana Luisa
中科院分区：
文献类型：
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作者：
Barbosa, Bruno;Boleo, Sara;Fernando, Ana Luisa
巨芦苇（芦竹）和芒草属。评价了它们对重金属污染土壤的耐受性和植物修复能力。在450和900 mg Zn kg（-1）、300和600 mg Cr kg（-1）、450和900 mg Pb kg（-1）的污染土壤中，对芦苇进行了试验。x B. tagteus，M. sinensis和M.在450和900 mg·kg ~（-1）Zn污染的土壤上进行了为期沿着2年的试验。巨芦苇生物量的生产受到污染的负面影响，但产量下降仅在600毫克铬kg（-1）的土壤。Zn污染显著降低了M. x B.t. teus生产，而不是M. sinensis或M. floridulus产量。然而，M。x teus也是生产力最高的。两种牧草都可以作为指示植物，生物量中的金属含量可以反映土壤中金属的含量。关于巨型芦苇实验，在污染土壤中，Zn获得了较高的修正生物富集因子（mBCFs，0.3-0.6）和转运因子（TFs，1.0-1.1），其次是Cr（mBCFs，0.2-0.4，地下器官; TFs，0.2-0.4）和Pb（mBCFs，0.06-0.07，地下器官; TFs，0.2-0.4）。重金属的积累也表现为Zn > Cr > Pb。在相似的土壤条件下，芒草基因型表现出不同的植物修复潜力。不同物种间的mBCF（0.3-0.9）和TF（0.7-1.5）相似，但观察到M.由于较高的生物质产量，巨芦苇和M. xacriteus可以被认为是锌植物提取的有趣的候选人，有利于观察到的金属积累和产生的高生物量。A. donax和芒草基因型表现出很好的植物稳定的重金属污染，因为这些草防止重金属和地下水污染的浸出。
Giant reed (Arundo donax) and Miscanthus spp. were tested to evaluate their tolerance and phytoremediation capacity in soils contaminated with heavy metals. Giant reed was tested under 450 and 900 mg Zn kg(-1), 300 and 600 mg Cr kg(-1), and 450 and 900 mg Pb kg(-1) contaminated soils, while the Miscanthus genotypes M. x giganteus, M. sinensis, and M. floridulus were tested on 450 and 900 mg Zn kg(-1) contaminated soils, along 2 years. Giant reed biomass production was negatively affected by the contamination; however, yield reduction was only significant under 600 mg Cr kg(-1) soil. Zn contamination reduced significantly M. x giganteus production but not M. sinensis or M. floridulus yields. Yet, M. x giganteus was also the most productive. Both grasses can be considered as indicators, once metal concentration in the biomass reflected soil metal concentration. Regarding giant reed experiments, higher modified bioconcentration factors (mBCFs, 0.3-0.6) and translocation factors (TFs, 1.0-1.1) were obtained for Zn, in the contaminated soils, followed by Cr (mBCFs, 0.2-0.4, belowground organs; TFs, 0.2-0.4) and Pb (mBCFs, 0.06-0.07, belowground organs; TFs, 0.2-0.4). Metal accumulation also followed the same pattern Zn > Cr > Pb. Miscanthus genotypes showed different phytoremediation potential facing similar soil conditions. mBCFs (0.3-0.9) and TFs (0.7-1.5) were similar among species, but highest zinc accumulation was observed with M. x giganteus due to the higher biomass production. Giant reed and M. x giganteus can be considered as interesting candidates for Zn phytoextraction, favored by the metal accumulation observed and the high biomass produced. A. donax and Miscanthus genotypes showed to be well suited for phytostabilization of heavy metal contamination as these grasses prevented the leaching of heavy metal and groundwater contamination.