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Öğe Organochlorine pesticides in the sewerage system of Konya-Turkey(PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2004) Aydin, ME; Ozcan, S; Sari, SIn this research, wastewater samples were collected at the general outlet and three different points of the main drainage channel of the sewerage system and analyzed for organochlorine pesticides, such as lindane, mirex, aldrin, heptachlor, methoxychlor, o,p-DDE, p,p-DDD, p,p-DDT and dieldrin. For determination and quantification of the pesticide standards method 6630 was used along with GC/ECD analysis. The recovery rates of solid phase and liquid-liquid extraction methodologies were compared, and changed between 35%-100% for solid phase and 70%-100% for liquid-liquid extractions. In this work, the maximum organochlorine pesticide contents of Konya wastewater varied between 0.02-7.87 mug/L for lindane, 0.13-21.35 mug/L for heptachlor, 0.004-10.13 mug/L for aldrin, <0.0002-1.72 mug/L for dieldrin, <0.01-26.13 mug/L for metboxychlor, <0.0002-1.32 mug/L for mirex, 0.016-4.39 mug/L for o,p-DDE, <0.0002-3.93 mug/L for p,p-DDD, and <0.01-2.28 mug/L for p,p-DDT.Öğe Polychlorinated biphenyls in wastewater of Konya-Turkey(PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2004) Aydin, ME; Sari, S; Ozcan, S; Wichmann, H; Bahadir, MIn this work wastewater samples were collected from 12 points in a sewerage system, the general outlet of the system and different points of the main drainage channel. USEPA method 8082 was used to analyze the PCB congeners 28, 52, 101, 138, 153 and 180, extracted from wastewater by using solid phase extraction cartridges. Recovery ratios were determined to be between 78% and 93% with the analyses of fortified samples. PCB contents of Konya wastewater varied between 0 and 1.3 mug/L for each congener. Possible sources of PCBs in wastewater and some measures to prevent their discharges are discussed.Öğe Ultrasonic solvent extraction of organochlorine pesticides from soil(ELSEVIER SCIENCE BV, 2006) Tor, A; Aydin, ME; Ozcan, SUltrasonic solvent extraction of the organochlorine pesticides (OCP) including alpha-, beta-, gamma- and Delta-hexachlorocyclohexane (HCH), heptachlor, aldrin, o,p'-DDE, dieldrin, p,p'-DDE, p,p'-DDT, methoxychlor, mirex from soil is reported. The extraction procedure was optimized with regard to the solvent type, amount of solvent, duration of sonication and number of extraction steps. Determination of pesticides was carried out by gas chromatography (GC) equipped with electron capture detection (ECD). Twice ultrasonic extraction using 25 mL, of a mixture of petroleum ether and acetone (1/1 v/v) for 20 min of sonication showed satisfactory extraction efficiency. Recoveries of pesticides from fortified soil samples are over 88% for three different fortification levels between 15 and 200 p,g kg(-1), and relative standard deviations of the recoveries are generally below 6%. Real soil samples were analyzed for OCP residues by optimized ultrasonic solvent extraction and shake-flask as well as soxhlet extraction technique. Investigated all extraction methods showed comparable extraction efficiencies. Optimized ultrasonic solvent extraction is the most rapid procedure because the use of time in ultrasonic extraction was considerably reduced compared to shake-flask and soxhlet extraction. (c) 2005 Elsevier B.V. All rights reserved.Öğe Using n-alkanes for identification of oils in domestic wastewaters(SELPER LTD, PUBLICATIONS DIV, 2005) Tor, A; Aydin, ME; Cengeloglu, Y; Ozcan, SThe aim of this work was to investigate whether linear aliphatic hydrocarbons had a usable potential for the determination of waste oil in wastewater. For that, n-alkanes analyses of wastewater samples from five sampling points (P-1-P-5) of the sewage system of Konya-Turkey were carried out by gas chromatographic technique and the parameters of carbon predominance index (ICP), n-C-17/n-C-18 and unresolved complex mixture (UCM)/n-alkanes ratios were determined. It was found that sampling points P, P, and P. which had ICP values 1.52 +/- 0.04, 1.43 +/- 0.05 and 1.12 +/- 0.05, respectively, were polluted with petroleum hydrocarbons and the aliphatic hydrocarbons detected in the sampling points of P, and F, which ad ICP values of 0.96 +/- 0.05 and 0.95 +/- 0.03, respectively, were from natural origin. These results were also supported by the parameters of n-C-12/n-C-18 and UCM/n-alkanes ratios and by the correlation between the parameters of ICP, n-C-17/n-C-18 UCM/n-alkanes and COD, Pb, Cr for all sampling points.