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    Öğe
    Evaluation of the Salt Lake effect on the ground waters of Aksaray-Turkey using geographic information system
    (Foundation Environmental Protection & Research-Fepr, 2010) Kavurmacı, Murat; Altaş, Levent; Kurmac, Yakup; Işık, Mustafa; Elhatip, Hatim
    As a result of unplanned groundwater use, the effects of The Salt Lake on the fresh water sources have increased. This case will associate with significant environment problems around the Salt Lake and its environments. In this study, the data have been evaluated for the groundwater samples taken from Aksaray which is one of the agricultural areas of Turkey and bounded of south and east shores of the Salt Lake. Totally 40 groundwater samples including 3 spring and 37 well were sampled from the region. The physical and chemical parameters of the water quality were investigated bi monthly during one year. The maps of water quality were prepared by using the Geographic Information System (GIS) to evaluate well effectively the data of the groundwater. The groundwaters generally have medium salinity hazard rate and a low sodium (alkali) hazard rate in terms of irrigation water use according to the USA Salinity Laboratory Irrigation Water Classification Diagram. While the increase of the salinity have showed the presence of enters of the saline water in the south and the south-east shores of The Salt Lake, it have decreased the quality of fresh waters with respect to the drinking and the use water.
  • Küçük Resim
    Öğe
    The impact of toxicity of metals on the activity of ureolytic mixed culture during the precipitation of calcium
    (Elsevier, 2009) Kurmac, Yakup
    in this article, the inhibitory impact of metals on Substrate utilization and microbial carbonate precipitation (MCP) by ureolytic mixed Cultures (UMC) was investigated with glucose and mineral medium under batch conditions. The IC(50) (toxicant concentration eliciting 50% inhibitory effect) values were determined from the BOD values of samples. Inhibition, expressed as the value of 50% inhibitory effect (IC(50)), was evaluated by the decrease in Substrate removal using BOD tests. The effect of toxicity of metals on substrate degradation, IC(50) values, was found to increase in the following order: Cd(II) > Cu(II) > Pb(II) > Cr(VI) > Ni(II) > Zn(II). Nitrification a possible phenomenon in the biocatalytic process was observed in several samples and this inhibited the precipitation of soluble calcium. During the removal of calcium from industrial calcium-rich wastewater, toxicity of metal at higher metal concentrations and possibility of nitrification at higher sludge ages should be considered. (C) 2008 Elsevier B.V. All rights reserved.