Assessment of metal accumulation capacity of Dittrichia viscosa (L.) Greuter in two different Italian mine areas for contaminated soils remediation
Assessment of metal accumulation capacity of Dittrichia viscosa (L.) Greuter in two different Italian mine areas for contaminated soils remediation
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DOI：
10.1016/j.gexplo.2016.10.001
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发表时间：
2017-11-01
影响因子：
3.9
通讯作者：
Dinelli, E.
中科院分区：
文献类型：
--
作者：
Buscaroli, A.;Zannoni, D.;Dinelli, E.
本研究旨在评价粘毛藓（Dittrichia viscossa（L.）更大的吸收和积累的一些潜在的有害元素（PHEs），如镉，铜，铁，镍，铅和锌，以验证其可能的植物修复污染矿山土壤。从两个不同的意大利矿区，Montevecchio和Libiola，植物被认为是与未受污染的地区的植物进行比较。在每个试验点（n = 21），根际土壤和D.对粘属植物进行取样、适当制备和分析。土壤样品进行了检查的总成分（XRF）和生物有效的馏分（DTPA提取）。分别分析了粘叶藓根、茎和叶，以量化不同植物部分中的金属存在。根据土壤总浓度计算的根/土比值表明，D.粘性土壤吸收PHEs，特别是那些更集中在基层。根据DTPA提取的土壤重金属计算的根/土比值，显示出D.在亚碱性矿区，该物种还表现出更大的能力，将PHEs从根转移到地上组织，沿着伴随着Ca的转移，揭示了植物提取的有趣特征。在亚酸性矿区，这一趋势反而较弱，PHEs往往积累在所有植物部位。粘毛藓似乎是合适的矿山土壤稳定在亚酸性和亚碱性环境中，也为植物提取在后者。(C)2016爱思唯尔B. V.保留所有权利。
The study aimed at assessing the capacity of Dittrichia viscosa (L.) Greuter to absorb and accumulate in its tissues some potentially harmful elements (PHEs), as Cd, Cu, Fe, Ni, Pb and Zn, in order to verify its possible use as phytoremediation in polluted mine soils. Plants from two different Italian mine areas, Montevecchio and Libiola, were considered and compared with plants from unpolluted areas. In each site (n = 21), both rhizospheric soil materials and D. viscosa plants were sampled, suitably prepared and analyzed. Soil samples were examined for both total composition (XRF) and bioavailable fractions (DTPA-extraction). Dittrichia viscosa roots, stems and leaves were analyzed separately to quantify the metal presence in the different plant parts. The root/soil ratio values calculated on the basis of the total soil concentrations, displayed a generally scarce capacity of D. viscosa to absorb soils PHEs, especially those more concentrated in the substrata. Concerning the root/soil ratio calculated on the basis of DTPA-extractable soil metals, values displayed instead a greater capacity of D. viscosa to absorb metals in the roots thus behaving as a potential phytostabilization plant in both mine areas.Regarding the leaf/root ratio, this species also displayed a greater capacity, in sub alkaline mine areas, to shift PHEs from roots to aboveground tissues, along with Ca transfer, revealing interesting characteristics for phytoextraction. In sub acid mine areas, this tendency was instead weaker and PHEs tended to be accumulated in all plant parts. Dittrichia viscosa seems to be appropriate for mine soil stabilization in both sub acid and sub alkaline environments and also for phytoextraction in the latter. (C) 2016 Elsevier B.V. All rights reserved.