Department of Environmental Geochemistry, IRNASA, CSIC, Apdo 257, 37071 Salamanca, Spain.
Environ Pollut. 2011 Oct;159(10):2637-47. doi: 10.1016/j.envpol.2011.05.027. Epub 2011 Jun 23.
A mining area affected by the abandoned exploitation of an arsenical tungsten deposit was studied in order to assess its arsenic pollution level and the feasibility of native plants for being used in phytoremediation approaches. Soil and plant samples were collected at different distances from the polluting sources and analysed for their As content and distribution. Critical soil total concentrations of As were found, with values in the range 70-5330 mg kg(-1) in the uppermost layer. The plant community develops As tolerance by exclusion strategies. Of the plant species growing in the most polluted site, the shrubs Salix atrocinerea Brot. and Genista scorpius (L.) DC. exhibit the lowest bioaccumulation factor (BF) values for their aerial parts, suggesting their suitability to be used with revegetation purposes. The species Scirpus holoschoenus L. highlights for its important potential to stabilise As at root level, accumulating As contents up to 3164 mg kg(-1).
研究了一个受砷钨矿床废弃开采影响的矿区，以评估其砷污染水平和本地植物用于植物修复方法的可行性。从污染源的不同距离采集了土壤和植物样本，并对其砷含量和分布进行了分析。发现临界土壤总砷浓度，最上层的范围在 70-5330mg/kg 之间。植物群落通过排除策略来耐受砷。在污染最严重的地点生长的植物物种中，灌木柳属和金雀花（L.）DC 的生物积累因子（BF）值最低，表明它们适合用于植被恢复目的。香蒲属 holoschoenus L. 因其在根部稳定砷的重要潜力而引人注目，其砷含量可积累至 3164mg/kg。
