Phytoremediation of mine soils contaminated by potentially toxic elements (PTEs) requires the use of tolerant plants given the specific conditions of toxicity in the altered soil ecosystems. In this sense, a survey was conducted in an ancient Hg-mining area named “El Terronal” (Asturias, Spain) which is severely affected by PTE contamination (As, Hg, Pb) to obtain an inventory of the spontaneous natural vegetation. A detailed habitat classification was performed and a specific index of coverage was applied after a one-year quadrat study in various sampling stations; seven species were finally selected (Agrostis tenuis, Betula celtiberica, Calluna vulgaris, Dactylis glomerata, Plantago lanceolata, Salix atrocinerea and Trifolium repens). A total of 21 samples (3 per plant) of the soil–plant system were collected and analyzed for the available and total concentrations of contaminants in soil and plants (roots and aerial parts). Most of the studied plant species were classified as non-accumulating plants, with particular exceptions as Calluna vulgaris for Pb and Dactylis glomerata for As. Overall, the results revealed interest for phytoremediation treatments, especially phytostabilization, as most of the plants studied were classified as excluder metallophytes.

中文翻译：

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在汞严重污染和矿区筛选具有植物修复潜力的先锋金属植物种

鉴于改变的土壤生态系统中的特定毒性条件，对被潜在有毒元素 (PTE) 污染的矿区土壤进行植物修复需要使用耐受性植物。从这个意义上说，在一个名为“El Terronal”（西班牙阿斯图里亚斯）的古老汞矿区进行了一项调查，该地区受到 PTE 污染（As、Hg、Pb）的严重影响，以获取自发性天然植被的清单。在各个采样站进行了为期一年的样方研究后，进行了详细的栖息地分类并应用了特定的覆盖指数； 最终选择了七种（Agrostis tenuis、Betula celtiberica、Calluna vulgaris、Dactylis glomerata、Plantago lanceolata, Salix atrocinerea和Trifolium repens)。共收集了土壤-植物系统的 21 个样品（每株植物 3 个），并分析了土壤和植物（根和地上部分）中污染物的可用浓度和总浓度。大多数研究的植物物种被归类为非蓄积植物，特别是Calluna vulgaris的 Pb 和Dactylis glomerata的 As例外。总体而言，结果显示了对植物修复处理的兴趣，尤其是植物稳定，因为大多数研究的植物被归类为排除金属植物。