Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleAçık Erişim2013Development of a new solid phase extraction procedure for selective separation and enrichment of Au(III) ions in environmental samples
Elvan, Hamide; Ozdes, Duygu; Duran, Celal; Bulut, V. Numan; Gümrükçüoglu, Nurhan; Soylak, Mustafa
A highly sensitive, selective and low cost solid phase extraction (SPE) procedure was developed for separation and enrichment of Au(III) ions in environmental samples prior to its flame atomic absorption spectrometric detection. Au(III)-2-pyridin-5-(4-tolyl)-1,3,4-oxadiazole (PYTOX) complex was adsorbed quantitatively on Amberlite XAD-4 resin in 0.5 mol L-1 HNO3 condition and the elution was carried out with 7.5 mL of 1.0 mol L-1 HCl in acetone. Some analytical parameters, affect the recoveries of Au(III) ions, such as HNO3 concentration of sample solution, amount of PYTOX, type, concentration and volume of eluent, sample volume and concomitants were examined. Adopting optimized experimental conditions, the limit of detection for Au(III) ions was 1.03 μg L-1 with preconcentration factor of 50 and a relative standard deviation (RSD) of 3.7%. The determination of Au(III) ions in anodic slime, gold ore, soil and sea and stream waters was performed after checking the accuracy of the method by addition-recovery tests.
- MakaleYalnız künye2007Heavy metals in compostable wastes: A case study in Gümüş hane, Turkey
Nas, S. Serkan; Bayram, Adem; Bulut, V. Numan; Gündoǧdu, Ali
This paper presents a general overview of the current municipal solid waste management in Gümüşhane Province, Turkey. In the study conducted between March 2004 and February 2005, the composting parameters (moisture content, total organic carbon, total nitrogen and pH), organic matter content and the heavy metal concentrations (Cd, Cr, Cu, Ni, Pb, Zn, Fe, Mn, Co) of the green wastes sorted from the mixed municipal solid waste were determined and evaluated. The analytes were determined with a relative standard deviation lower than 6% in all samples. The organic fraction of biological origin made up about 30% of the total amount of the municipal solid waste. Moisture content was 78%, organic matter content was 92.1%, C/N ratio was 21.6/1 and pH was 4.73. Heavy metal concentrations of the green wastes mixed with domestic wastes were found to be higher than the separately collected green wastes. Heavy metal concentrations of the green wastes from the open dump were determined to decrease in the following order: Fe>Mn>Zn>Cr>Cu>Pb>Ni> Cd>Co.