4.7 Article

Microbially assisted phytoremediation approaches for two multi-element contaminated sites

期刊

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 21, 期 11, 页码 6845-6858

出版社

SPRINGER HEIDELBERG
DOI: 10.1007/s11356-013-2165-0

关键词

Plant growth promoting rhizobacteria (PGPR); Microbial consortia; Plant-microbe interactions; Phytoremediation; Pot experiments; Multi-element contamination; Acid main drainage

资金

  1. EU [FP7-ENV-2008-1/226870 UMBRELLA]
  2. Excellence Graduate School JSMC [DFG-GSC 24]

向作者/读者索取更多资源

Phytoremediation is an environmental friendly, cost-effective technology for a soft restoration of abandoned mine sites. The grasses Agrostis capillaris, Deschampsia flexuosa and Festuca rubra, and the annual herb Helianthus annuus were combined with microbial consortia in pot experiments on multi-metal polluted substrates collected at a former uranium mine near Ronneburg, Germany, and a historic copper mine in Kopparberg, Sweden, to test for phytoextraction versus phytostabilization abilities. Metal uptake into plant biomass was evaluated to identify optimal plant-microbe combinations for each substrate. Metal bioavailability was found to be plant species and element specific, and influenced by the applied bacterial consortia of 10 strains, each isolated from the same soil to which it was applied. H. annuus showed high extraction capacity for several metals on the German soil independent of inoculation. Our study could also show a significant enhancement of extraction for F. rubra and A. capillaris when combined with the bacterial consortium, although usually grasses are considered metal excluder species. On the Swedish mixed substrate, due to its toxicity, with 30 % bark compost, A. capillaris inoculated with the respective consortium was able to extract multi-metal contaminants.

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