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Scientific Papers, USAMV Bucharest, Series A, Vol.LII, 2009, ISSN 1222-5339ESTIMATION OF SOME HEAVY METALS ACCUMULATION INPLANTS AND SOILS FROM COPSA MICA AREANICOLETA VRÎNCEANU, D.M. MOTELICĂ, M. DUMITRU,EUGENIA GAMENŢ, M. TOTI, VERONICA TĂNASE, MIHAELA PREDANational Research and Development Institute for soil Science, Agrochemistry andEnvironmental Protection of BucharestKeywords: pollution, soil, heavy metals, regression curves, Copsa MicaAbstractHeavy metals pollution of soil enhances plant uptake causing accumulation in plant tissuesand eventual phytotoxicity and change of plant community. The research was carried outwithin the area affected by emissions released from Copsa Mica industrial platform. Thesampling grid of soil and plant was regular - 118 plant samples and 103 soil samples werecollected. Main crops identified within investigated area were: maize (Zea mays), wheat(Triticum aestivum), oat (Avena sativa), soybean (Glycine max). The analyses carried outto determine the heavy metals (Cd, Zn and Pb) contents in plants revealed that Equisetumpratense, Cynodon dactylon, Verbascum phlomoides, Calamagrostis pseudophragmites andAsclepias syriaca accumulated high amounts of heavy metals in their tissues. Theregression curves were used to assess the stochastic dependences between heavy metalcontent in soil and heavy metal content in plant.76
Scientific Papers, USAMV Bucharest, Series A, Vol. LII, 2009, ISSN 1222-5339DISTRIBUTION OF SELENIUM TOTAL CONTENT IN THE SOILSSITUATED IN THE SOUTH-EASTERN PART OF ROMANIA, FROMCENTRAL AND SOUTH DOBRUDJAMIHAELA MONICA ALDEA, R. LĂCĂTUŞU, MIHAELA LUNGU, NINETARIZEA, VENERA MIHAELA STROE, RODICA DOINA LAZĂRNational Research and Development Institute for Soil Science, Agrochemistry andEnvironmental Protection of BucharestKeywords: soil, selenium, distributionAbstractA number of 49 soil samples were collected from the South-Eastern part of Romanianterritory, in Central and South Dobrudja, from the upper horizon (0-20 cm) of some soilswith predominantly agricultural use, especially arable lands, consisting of wheat crops.These soils belong to the next types: Fluvisol 1 (FL), Chernozem (CH), Kastanozems (KZ).Selenium total content was determined from the analysed samples through the optic methodof analyse, the atomic absorption spectroflamephotometry coupled with hydridesgenerator. Grouping centre parameters ( x -arithmetic mean, Me-median, Mo-module) andspreading parameters (x min -minimum value, x max -maximum value, σ-standard deviation, andcv%-coefficient of variation) were computed for total selenium contents in the analysedsamples to outline the distribution of these chemical elements in the soils of the studiedarea.82
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