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(43-07) On site selection of plants for phytoremediation. Kovacs, Elza*,1, Pechmann, Ildiko1, Tamas, Janos1, 1 University of Debrecen, Centre of Agri. Sciences, Debrecen, Hungary ABSTRACT- Large areas are contaminated with zinc, cadmium, lead and copper as a result of mining activities, particularly deposition of sludge, a by-product of flotation process. Phytoextraction of heavy metals has been thought to be an environmentally friendly, cost-effective solution to remediate soils polluted by heavy metals. One way of it to use hyperaccumulator plants, which are able to accumulate and tolerate heavy metals in high amounts. There are some results of on site identification of plants potentially applicable for phytoremediation. However, most pieces of information related to phytoremediation have been gained from data of plant physiological pot experiments, which cannot be used directly for planning clean-up, since spatial variation of physical/chemical parameters have considerable effect on the efficiency of the technology. The aim of our study was to amend phytoremediation by providing information on potential hyperaccumulator, indicator or excluder species gained on site. At a mining area contaminated with zinc, cadmium, lead and copper resulting from flotation waste spoils located in Gyongyosoroszi, Hungary, spatial distribution of heavy metals was estimated by using GPS/GIS technique and geo-statistical methods. Total metal contents and potentially bio-available portions of heavy metals as well as pH were determined by ICP-OES analysis after HNO3-H2O2 digestion, from Lakanen-Ervio extracts and from water suspension, respectively. And in situ ceonological survey was carried out to identify heavy metal tolerant species according to their spatial pattern comparing to that of heavy metals. Based on the results, selected species were collected from the mining area to determine their heavy metal content as a function of heavy metal concentration in soil. In our poster method and results of selection of plants for phytoremediation will be presented. Key words: phytoremediation, heavy metal |
