Instituto Patagónico para el Estudio de los Ecosistemas Continentales (IPEEC-CONICET), Boulevard Brown 2915, U9120ACD Puerto Madryn, Chubut, Argentina; Universidad Nacional de la Patagonia San Juan Bosco, Boulevard Brown 3051, U9120ACD Puerto Madryn, Chubut, Argentina.
Instituto Patagónico para el Estudio de los Ecosistemas Continentales (IPEEC-CONICET), Boulevard Brown 2915, U9120ACD Puerto Madryn, Chubut, Argentina.
Mar Pollut Bull. 2017 May 15;118(1-2):297-306. doi: 10.1016/j.marpolbul.2017.03.007. Epub 2017 Mar 11.
Phytoremediation is considered the most appropriate technique to restore metal polluted soil, given its low cost, high efficiency and low environmental impact. Spartina densiflora and Sarcocornia perennis are perennial halophytes growing under similar environmental conditions in San Antonio marsh (Patagonia Argentina), therefore it is interesting to compare their phytoremediation potential capacity. To this end, we compared concentrations of Pb, Zn, Cu, and Fe in soils and in below- and above-ground structures of S. perennis and S. densiflora. It was concluded that both species are able to inhabit Pb, Zn, and Cu polluted soils. Although Sarcocornia translocated more metals to the aerial structures than Spartina, both species translocated only when they were growing in soils with low metal concentrations. It seems that the plants translocate only a certain proportion of the metal contained in the soil. These results suggest that both species could be considered candidates to phytostabilize these metals in polluted soils.
植物修复被认为是恢复金属污染土壤的最合适技术，因为它具有成本低、效率高和环境影响低的特点。大米草和互花米草是在阿根廷巴塔哥尼亚圣安东尼奥沼泽（San Antonio marsh）相似的环境条件下生长的多年生盐生植物，因此比较它们的植物修复潜力是很有趣的。为此，我们比较了大米草和大米草在土壤中和地下地上结构中的 Pb、Zn、Cu 和 Fe 浓度。结果表明，两种植物都能够在 Pb、Zn 和 Cu 污染的土壤中生长。尽管互花米草比大米草向地上结构转移了更多的金属，但当它们生长在金属浓度低的土壤中时，两种植物都只转移了金属。似乎植物只转移了土壤中所含金属的一定比例。这些结果表明，这两个物种都可以被认为是在污染土壤中固定这些金属的候选者。
