8058

7493

كارشناسي ارشد

شيمي تجزيه

اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي

1391

يازده،47ص.:‌مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

علي اصغر انصافي، بهزاد رضايي

4/8/92

تقي خياميان، محمدتقي جعفري

شيمي

ID7493

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Preconcentration and Extraction of Trace Amount of Cadmium in Soil Using Modified FeCr2O4 Magnetic Nanoparticles and Determination by Atomic Absorption Spectroscopy Zakwan Mujawaz zakzakm@Hotmail com Department of Chemistry Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor A A Ensafi prof Ensafi@cc iut ac ir Supervisor B Rezaei prof rezaei@cc iut ac ir Abstract Studying pollution of heavy metals in soil indispensable for maintaining the environment quality should be considered at different levels of decision making by researches Cadmium is one of three big of heavy metals with the greatest potential hazard to humans and the environment In this study magnetic nanoparticles FeCr2O4 MWCNTs were prepared and modified by sol gel method The magnetic nanoparticles was characterized by X ray diffraction XRD scanning electron microscopy SEM atomic force microscope AFM and transmission electron microscopy TEM Preconcentration trace amount of cadmium II was analyzed in environmental samples by magnetic solid phase extraction Detection in this technique was performed by flame atomic absorption spectroscopy The best results were obtained in pH 7 0 of general buffered sample with rotating rate of 800 rpm 1 5 mL eluent solution of nitric acid with 1 2 M concentration and in 25 minutes The detection limit and RSD were 1 3 g L and 1 25 respectively with the enrichment factor 67 Finally this technique was used for analyte measurement of soil of Isfahan steel company and zayandeh road river Keywords Cadmium Flame atomic absorption spectrometry magnetic nanoparticles magnetic solid phase extraction PDF created with pdfFactory trial version www pdffactory com

علي اصغر انصافي، بهزاد رضايي

تقي خياميان، محمدتقي جعفري