Departamento de Química Agrícola, Universidad Autónoma de Madrid, Madrid, Spain.
Int J Phytoremediation. 2011 Jul;13(6):567-79. doi: 10.1080/15226514.2010.495152.
The possibility of remediating contaminated soils though the use of high biomass-generating, native plant species capable of removing heavy metals is receiving increased attention. The cadmium (Cd) accumulation capacities of the native Mediterranean, perennial shrubs Atriplex halimus, Phyllirea angustifolia, Rhamnus alaternus and Rosmarinus officinalis were tested by growing transplanted specimens in a pine bark compost substrate (pH 5.6) contaminated with 100 mg Cd kg(-1). After 70 days, only R. alaternus showed reduced growth. The increase in biomass seen in all the test species enhanced the phytoextraction of Cd. However, the species behaved as metal excluders, except for the halophyte A. halimus, which behaved as an indicator plant. In this species the leaf Cd concentration reached 35 mg Cd kg(-1), with the shoot responsible for some 86% of total Cd accumulation. Atriplex halimus showed the highest bioconcentration factor (BCF) (0.36) and leaf Cd transport index (1.68); consequently, this species showed the highest Cd phytoextraction capacity.
通过使用能够去除重金属的高生物质生成、本地植物物种来修复污染土壤的可能性正受到越来越多的关注。通过在 pH 值为 5.6 的松树皮堆肥基质中种植移植标本，测试了本地地中海多年生灌木滨藜、石蝉草、鼠李和迷迭香对镉（Cd）的积累能力，该基质中含有 100 mg Cd kg(-1)的 Cd。70 天后，只有 R. alaternus 的生长受到抑制。所有受测试物种的生物量增加都增强了 Cd 的植物提取。然而，除了盐生滨藜 A. halimus 外，这些物种表现为金属排斥物，后者表现为指示植物。在该物种中，叶片 Cd 浓度达到 35 mg Cd kg(-1)，茎负责大约 86%的总 Cd 积累。滨藜的生物浓缩因子（BCF）最高（0.36），叶片 Cd 转运指数（1.68）最高；因此，该物种的 Cd 植物提取能力最高。
