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You are here: Home » Past Issues » Volume 12, 2017 - Number 1 » YEAST-BASED MICROBIOLOGICAL DECONTAMINATION OF HEAVY METAL CONTAMINATED SOILS OF TARNIŢA


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Raluca ŞTEFĂNESCU1, Alina-Elena BUTNARIU2, Maria-Magdalena ZAMFIRACHE2, Andriana SURLEVA3, Cătălina Ionica CIOBANU1, Olga PINTILIE4 & Gabi DROCHIOIU1*
1Faculty of Chemistry, “Alexandru Ioan Cuza” University of Iasi, 11 Carol I, Iasi-700506, Romania, rallstef@gmail.com, catalina.ciobanu@uaic.ro, gabidr@uaic.ro
2Faculty of Biology, “Alexandru Ioan Cuza” University of Iasi, 20A Carol I, Iasi-700505, Romania, butnariu_alina@yahoo.com, magda@uaic.ro
3
Analytical Chemistry Department, University of Chemical Technology and Metallurgy, 8 St. Kl. Ohridski av., 1756 Sofia, Bulgaria, surleva@uctm.edu
4 Faculty of Geography and Geology, “Alexandru Ioan Cuza” University of Iasi, 20A Carol I, Iasi-700505, Romania, olgapintilie@yahoo.com

YEAST-BASED MICROBIOLOGICAL DECONTAMINATION OF HEAVY METAL CONTAMINATED SOILS OF TARNIŢA

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Abstract:

Heavy-metal pollution of forest soils represents an important environmental concern due to the toxic effects of metals, and their accumulation throughout the food chain. In this paper, the yeast-based decontamination of soil containing high amounts of heavy metals and arsenic, originated from a sterile dump of Tarniţa-Suceava, Romania, was investigated. The sterile dump and soil around it contain increased concentrations of Cu, Fe, Pb, Zn, Ba, and As, that affected the germination of wheat seeds used here as an indicator of toxicity. The germination of wheat seeds (Triticum aestivum) was interrupted by small amounts of sterile dump material, but recovered after soil washing with distilled water, and removing the supernatant. Furthermore, seed germination was strongly inhibited when the wheat seeds were treated with the toxic supernatant, which was extracted from the sample. In conclusion, yeast (Saccharomyces cerevisiae) succeeded to partly retain heavy metals and arsenic from soil extracts.


Keyword: yeast, arsenic, heavy metals, wheat, germination


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