Eco-auditing Group, National Botanical Research Institute, Rana Pratap Marg, Lucknow 226001, India.
J Hazard Mater. 2009 Dec 15;172(1):269-75. doi: 10.1016/j.jhazmat.2009.07.004. Epub 2009 Jul 8.
A greenhouse pot experiment was conducted to test the heavy metal phytoremediation capacity of Jatropha curcas from fly ash. Both natural accumulation by J. curcas and chemically enhanced phytoextraction was investigated. Plants were grown on FA and FA amended with fertile garden soil, in presence and absence of chemical chelating agent EDTA at 0.1 g kg(-1) and 0.3 g kg(-1) of soil. EDTA enhanced the uptake of all five elements (Fe, Al, Cr, Cu and Mn) tested. Fe and Mn were retained more in roots while Cu, Al and Cr were translocated more to the shoot. Metal accumulation index indicates that the effect of EDTA at 0.3 g kg(-1) was more pronounced than EDTA at 0.1 g kg(-1) in terms of metal accumulation. Biomass was enhanced up to 37% when FA was amended with GS. Heavy metal uptake was enhanced by 117% in root, 62% in stem, 86% in leaves when EDTA was applied at 0.3 g kg(-1) to FA amended with GS. Study suggest that J. curcas has potential of establishing itself on FA when provided with basic plant nutrients and can also accumulate heavy metals many folds from FA without attenuating plant growth.
进行了温室盆栽实验，以测试来自粉煤灰的麻疯树的重金属植物修复能力。研究了麻疯树的自然积累和化学强化植物提取。在存在和不存在 0.1 g kg(-1) 和 0.3 g kg(-1)土壤的化学螯合剂 EDTA 的情况下，将植物种植在 FA 和 FA 与肥沃花园土壤混合的土壤上。EDTA 增强了所有五种元素（Fe、Al、Cr、Cu 和 Mn）的吸收。Fe 和 Mn 在根部保留更多，而 Cu、Al 和 Cr 则更多地转移到地上部分。金属积累指数表明，就金属积累而言，0.3 g kg(-1)EDTA 的效果比 0.1 g kg(-1)EDTA 更为明显。当 FA 与 GS 混合时，生物量增加了 37%。当在添加 GS 的 FA 上施加 0.3 g kg(-1)EDTA 时，根部重金属吸收增加了 117%，茎部增加了 62%，叶片增加了 86%。研究表明，当提供基本植物养分时，麻疯树有可能在粉煤灰上建立自己的种群，并且可以从粉煤灰中积累多倍的重金属，而不会削弱植物的生长。
