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2016 | 25 | 5 |
Tytuł artykułu

Adsorption characteristics of magnesium-modified bentonite clay with respect to acid blue 129 in aqueous media

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Locally available bentonite clay has been modified by magnesium and used to eliminate acid blue 129 from aqueous solutions. The adsorption was studied under different experimental conditions such as dye concentrations, temperature, and shaking time. The adsorption of the dye increased with time and followed the pseudo-first-order kinetic with rate constant “k” 0.126 min-1 at 283 K. Thermodynamic parameters such as ΔH°, ΔS°, and ΔG° were calculated from the slope and intercept of the linear plots of ln K against1/T. Analysis of adsorption results obtained at temperatures of 283, 293, 303, and 313 K showed that the adsorption pattern on bentonite seems to follow Langmuir and Freundlih. The increase in temperature reduces adsorption capacity by magnesium-modified bentonite due to the enhancement of the desorption step in the mechanism. The activation energy of the adsorption process was found to be 3.55 kJ mol-1. The Mg-bentonite showed better adsorption than Ba and Al-bentonite. Our study reveals that abundantly available local clay may be used to eliminate dyes from aqueous solutions.
Słowa kluczowe
Wydawca
-
Rocznik
Tom
25
Numer
5
Opis fizyczny
p.1947-1953,fig.,ref.
Twórcy
autor
  • Faculty of Materials and Chemical Engineering, GIK Institute of Engineering Sciences and Technology Topi, 23460, KPK, Pakistan
autor
  • Institute of Chemical Sciences, University of Peshawar, 25120, KPK, Pakistan
autor
  • Department of Biochemistry, Shaheed Benazir Bhutto Women’s University, Peshawar, KPK, Pakistan
autor
  • Department of Biochemistry, Shaheed Benazir Bhutto Women’s University, Peshawar, KPK, Pakistan
autor
  • Institute of Chemical Sciences, University of Peshawar, 25120, KPK, Pakistan
autor
  • Interdisciplinary Research Center In Biomedical Materials (IRCBM), COMSAT Institute, Lahore, Pakistan
autor
  • Institute of Chemistry, State University of Campinas, CEP 13083-970 Campinas, SP, Brazil
autor
  • Institute of Chemistry, State University of Campinas, CEP 13083-970 Campinas, SP, Brazil
autor
  • Faculty of Materials and Chemical Engineering, GIK Institute of Engineering Sciences and Technology Topi, 23460, KPK, Pakistan
autor
  • Institute of Chemical Sciences, University of Peshawar, 25120, KPK, Pakistan
Bibliografia
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Typ dokumentu
Bibliografia
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