Browsing by Author "Gemechu, Yenenesh"

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    Determination of Heavy Metals in the Soils of Flower Farms at Zeway, Sebeta and Holeta
    (Addis Ababa University, 2020-03-02) Gemechu, Yenenesh; Getachew, Negash (PhD)
    Soils polluted with heavy metals have become common across the globe due to increase in geologic and anthropogenic activities. Heavy metals in the soil refers to some significant heavy metals of biological toxicity, including mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr), nickel (Ni), arsenic (As), etc. With the development of the economy, more specific with the development of industry the presence of heavy metals in the soil caused by this activity have gradually increased in recent years. These in turn have resulted in serious environment deterioration. The aim of this research was to evaluate the real situation of the soil contamination with heavy metals within the Flower farm of Zeway, Sebeta and Holeta in Ethiopia, and particularly in Oromia region. The obtained values of reagents volume, temperature and time for optimal procedure were 6 mL of the mixture of HCl and HNO3 with the ratio of 3:1, 210oC and 3:00 hour to mineralize powdered samples during wet digestion. The concentration of some selected metals in the soil samples were determined by micro wave plasma atomic emission spectroscopy. The mean concentration of heavy metals in soil samples near the flower farm exhibited decreased trend in the order of Fe > Zn >Ni > Cu > Cr .