Institute of Ecosystem Studies, National Research Council, Pisa, Italy.
Int J Phytoremediation. 2011 Nov-Dec;13(10):985-97. doi: 10.1080/15226514.2010.549858.
This study assessed the distribution and availability of plant uptake of Zn, Pb, and Cd present in an abandoned mine at Ingurtosu, Sardinia (Italy). Geological matrix samples (sediments, tailings, and soil from a nearby pasture site) and samples of the predominant plant species growing on sediments and tailings were collected. Mean values of total Zn, Pb and Cd were respectively (mg kg(-1)) 7400, 1800, and 56 in tailings, 31000, 2900, and 100 in sediments, and 400, 200, and 8 in the pasture soil. The metal concentration values were high even in the mobile fractions evaluated by simplified sequential extraction (Zn 7485-103, Pb 1015-101, Cd 47-4 mg kg(-1)). Predominant native species were identified and analyzed for heavy metal content in various tissues. Among the plant species investigated Inula viscosa, Euphorbia dendroides, and Poa annua showed the highest metal concentration in aboveground biomass (mean average of Zn: 1680, 1020, 1400; Pb: 420, 240, 80; Cd: 28, 7, 19 mg kg(-1), respectively). The above mentioned species and A. donax could be good candidates for a phytoextraction procedure. Cistus salvifolius and Helichrysum italicus generally showed behavior more suitable for a phytostabilizer.
本研究评估了意大利撒丁岛因古图苏废弃矿山中存在的 Zn、Pb 和 Cd 的植物吸收分布和可利用性。采集了地质基质样品（沉积物、尾矿和附近牧场土壤）和生长在沉积物和尾矿上的主要植物物种的样本。尾矿中总 Zn、Pb 和 Cd 的平均值分别为（mg/kg）7400、1800 和 56，沉积物中分别为 31000、2900 和 100，牧场土壤中分别为 400、200 和 8。即使在简化的连续提取评估的可移动部分，金属浓度值也很高（Zn 7485-103、Pb 1015-101、Cd 47-4 mg/kg）。确定了主要的本地物种，并分析了各种组织中的重金属含量。在所研究的植物物种中，旋覆花、乳浆大戟和草地早熟禾地上生物量的金属浓度最高（Zn 的平均平均值分别为 1680、1020、1400；Pb 分别为 420、240、80；Cd 分别为 28、7、19 mg/kg）。上述物种和 A. donax 可作为植物提取程序的良好候选物。滨藜和意大利蜡菊通常表现出更适合植物稳定剂的行为。
