کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7643510 | 1494884 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Solid-phase extraction of metal ions from fuel ethanol with a nanostructured adsorbent
ترجمه فارسی عنوان
استخراج جامد یونهای فلزی از اتانول سوخت با یک جاذب نانوساختار
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کلمات کلیدی
سوخت اتانول، استخراج فاز جامد، روش تعیین، روش تحلیلی، پارامترهای ترمودینامیکی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
This work describes the synthesis and characterization of a new octakis[3-(2,2â²-dipyridylamine)propyl]octasilsesquioxane (T8-Pr-DPA), and a study of the metal ion preconcentration in fuel ethanol. Batch and column experiments were conducted to investigate for the removal of heavy metal ions from fuel ethanol. The results showed that the Langmuir allowed to describe the sorption equilibrium data of the metal ions on T8-Pr-DPA in a satisfactory way. The following maximum adsorption capacities (in mmol gâ 1) were determined: 3.62 for Fe (III), 3.32 for Cr (III), 2.15 for Cu (II), 1.80 for Co (II), 1.62 for Pb (II), 1.32 for Ni (II) and 0.88 for Zn (II). The thermodynamic parameters for the adsorption process such as free energy of adsorption (ÎG), enthalpy of adsorption (ÎH) and entropy of adsorption (ÎS) were calculated. Thermodynamic parameters showed that the system has favorable enthalpic, Gibbs free energy, and entropic values. The sorption-desorption of the metal ions has made possible the development of a preconcentration and determination method of metal ions at trace level in fuel ethanol. The method of quantitative analysis for Fe, Cu, Ni and Zn in fuel ethanol by Flame AAS was validated. Several parameters have been taken into account and evaluated for the validation of method, namely: linearity, limit of detection, limit of quantification, and the relative standard deviation and accuracy. The accuracy of the method was assessed by testing analyte recovery in the fuel ethanol samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 110, September 2013, Pages 120-126
Journal: Microchemical Journal - Volume 110, September 2013, Pages 120-126
نویسندگان
Isaac V. Soares, Eduardo G. Vieira, Devaney R. do Carmo, Newton L. Dias Filho,