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دانلود مقاله Removal of Palladium by Sodiumdodecyl Sulphate coated magnetite nanoparticles from water samples تحت pdf دارای 13 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است

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بخشی از متن دانلود مقاله Removal of Palladium by Sodiumdodecyl Sulphate coated magnetite nanoparticles from water samples تحت pdf :

سال انتشار: 1392
محل انتشار: همایش ملی پژوهشهای محیط زیست ایران
تعداد صفحات: 13
چکیده:

A rapid, sample and sensitive magnetic solid phase extraction method was developed for the preconcentration and determination of palladium ions in water samples. In this study, palladium ions from complexes with 5-(4-Dimethylaminobenzylidene) rhodanine (DMR) and then are quantitatively extracted to the surface of sodium dodecyl sulfate (SDS) – coated magnetite nanoparticles (Fe3O4NPs) in a batch process and then analysis by flame atomic absorption spectrometry (FAAS). The effect of different parameters such as pH of sample, concentrations of DMR, amounts of SDS and Fe3O4NPs, contact time and interfering ions on the removal of palladium ions were studied. Salt addition has a negative µg L-1 with R2=0.9985. Detection and relative standard deviation of the proposed method were 20 µg L-1 and 2.87% respectively. The adsorption data were analyzed by Langmuir and Freundlich isotherm models and a maximum adsorption amount of 344.83 mg g-1 and a Langmuir adsorption equilibrium constant of 0.0115 Lmg-1 and Freundlich constant (Kf) 5.84 and (n) 1.26 were obtained. Finally, this adsorbent was successfully used for removal of palladium from several environmental water samples.

 

 

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