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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Avena Sativa - En hyperackumulator? : En studie av havres kadmiumupptag / Avena Sativa - A Hyper Accumulator?

Eckert, Andreas, Fransson, Cecilia January 2009 (has links)
The aim of our research was to investigate if oat is capable of extracting cadmium to such extent that it is usable in decontaminating polluted soils. We grew oat in a hydroponic culture during 28 days in a controlled environment and a total of 30 plants were used. The nutrient solutions were contaminated with cadmium of ten different concentrations after seven days. After harvesting the plants, the roots were separated from the shoots, placed in separate containers and then turned to ashes. The cadmium content was measured three times per sample in an atomic absorption spectrometer. Our results indicate that the ability of oat to extract cadmium from a solution is linearly dependent of the cadmium concentration of the solution. We also noted that the resistivity to cadmium of oat is limited. When the concentration of accessible cadmium ions exceeded 0,06mM, a significant difference of the shoot growth appeared. The results we obtained from shoots and roots show cadmium amounts much higher in the roots than the shoots. Despite this difference there were sufficient amounts of cadmium in the shoots to call oat a hyper accumulator. This means that oat fulfills one of the criteria of a phytoextractor.
2

<em></em><em>Avena Sativa - </em>En hyperackumulator? : En studie av havres kadmiumupptag / <em>Avena Sativa - </em>A Hyper Accumulator?

Eckert, Andreas, Fransson, Cecilia January 2009 (has links)
<p>The aim of our research was to investigate if oat is capable of extracting cadmium to such extent that it is usable in decontaminating polluted soils. We grew oat in a hydroponic culture during 28 days in a controlled environment and a total of 30 plants were used. The nutrient solutions were contaminated with cadmium of ten different concentrations after seven days. After harvesting the plants, the roots were separated from the shoots, placed in separate containers and then turned to ashes. The cadmium content was measured three times per sample in an atomic absorption spectrometer.</p><p>Our results indicate that the ability of oat to extract cadmium from a solution is linearly dependent of the cadmium concentration of the solution. We also noted that the resistivity to cadmium of oat is limited. When the concentration of accessible cadmium ions exceeded 0,06mM, a significant difference of the shoot growth appeared. The results we obtained from shoots and roots show cadmium amounts much higher in the roots than the shoots. Despite this difference there were sufficient amounts of cadmium in the shoots to call oat a hyper accumulator. This means that oat fulfills one of the criteria of a phytoextractor.</p>

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