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Öğe Bioaccumulation of copper, cadmium and nickel in Duckweed (Lemna trisulca)(Parlar Scientific Publications, 2015) Kara Y.; Akba O.Duckweeds are small free-floating plants often farming dense mats on the surface of stillor slow flowing water. Lemna trisulca (Duckweed) was examined for its ability to remove heavy metals. In laboratory conditions, plants were exposed to the copper, cadmium and nickel concentrations of 1.0,3.0,5.0 and 7.0 mg L-1 in certain periods (24,48,72 and 96 hours). The accumulation levels of metals in plants depending on different time and concentrations were investigated by using atomic absorption spectrometer. The results on bioaccumulation rates of Ni, Cd and Cu ions in Duckweed showed that the plant was able to remove the heavy metals. The maximum BCF values obtained were 541 for Cd, 848 for Cu and 1867 for Ni. Among the metals used, Ni was found to be accumulated at higher levels depending on the metal concentrations and time periods. © by PSP.Öğe Chemical analysis of geothermal water of Çermik, Turkey(2003) Akba O.; Baysal A.; Hamamci C.; Merdivan M.; Gumgum B.Geothermal water of Çermik, which is located in Southeast Anatolia - Turkey, is a Na-Cl-HCO3 type containing also sulfide and iodide. The temperature, pH and flow rate of the geothermal water are 51°C, 7.6 and 21 L s-1, respectively. Its physical and chemical characterization in detail was done using standard methods. The trace elements Al, Ba, Co, Cr, Cu, Fe, Mn, Ni, Pb, Sr and Zn were analyzed directly using inductively coupled plasma-atomic emission spectrometry due to very low detection limits and the good reproducibility of this analytical method.Öğe Content and mobility behavior of iron and manganese in asphaltite burning residue using ICP-OES(Perkin - Elmer Corp., 2014) Aydin I.; Gunduz B.; Aydin F.; Akba O.; Saydut A.; Hamamci C.The determination of inorganic pollutants leaching from solid waste, such as coal, asphaltite, oil shale, and ash, is an important topic for industrial applications and solid waste management. This study presents the concentration and fractionation of iron (Fe) and manganese (Mn) in asphaltite burning residue (ABR) and their determination by inductively coupled plasma optical emission spectrometry (ICP-OES). A modified Tessier sequential extraction method was used for the fractionation of Fe and Mn in four forms (exchangeable, carbonates, bound to organic and sulfide, and residual content). Investigations on the Fe and Mn chemical fractions and their environmental mobility in ash solution systems were carried out. It was found that Mn in ABR (from Harbul-Silopi, Turkey) occurs in the following fractions: exchangeable (13.56%), associated with carbonates (28.94%), associated with organic matter and sulfides (17.48%), and residual content (40.08%). Fe occurs in the following fractions: exchangeable (11.11%), carbonates (27.68%), organic matter and sulfides (23.39%), and residual content (37.82%). Among these fractions, the exchangeable and carbonate-bound fractions are unstable and prone to leach out, while the organic matter-bound fractions and the residual fractions are considered to be relatively stable and of low bioavailability. Thw mobility fractions of Fe contain 38.79% and of Mn contain 42.50% of their total concentration in ABR under normal environmental conditions.Öğe Copper and zinc contamination of the Tigris River (Turkey) and its wetlands(2001) Gümgüm B.; Ünlü E.; Akba O.; Yildiz A.; Namli O.Copper and zinc were determined in the water and freshwater fish (Carasobarbus luteus) from the Tigris River, and its surrounding soils, wheat and mushrooms by using a Jobin Yvon model 24 Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). The average contents of Cu and Zn in the river water, were found 0.03 mg L-1 and 0.14 mg L-1, and in the liver of fish were found approximately 454 mg kg-1 and 290 mg kg-1 respectively. All Cu and Zn values in the soils that irrigated with the river water, were found higher than the non irrigated soils in the same area. The similar results were observed in wheat and mushrooms, that near or far from the river.
