In the present study, fuller's earth (FE) was modified with sodium dodecyl sulfate for removal of Acid Red 17 (AR 17) dye from aqueous solutions. The surfactant-modified FE and FE were characterized by a Fourier transform infrared spectrometer, thermogravimetric analyzer and scanning electron microscope. Batch adsorption experiments were carried out as a function of contact time, pH, initial concentration of AR 17 and adsorbent dosage. About 99.1% adsorption efficiency was achieved within 60 min at adsorbent dose of 0.1 g for initial dye concentration of 1,000 mg L−1 at pH 10. The adsorption data were well fitted with the Dubinin–Radushkevich isotherm model implying physisorption as the major phenomenon for adsorption. The kinetic data were analyzed using four kinetic equations: pseudo-first-order, pseudo-second-order, intraparticle diffusion and Elovich equations. The rates of adsorption confirmed the pseudo-second-order kinetics with good correlation value (R2 = 0.999). The results indicate that the modified adsorbent can effectively be used for the removal of AR 17 from wastewater with high absorption capacity of 2164.61 mg g−1.
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Research Article|
January 02 2017
Kinetic and equilibrium profile of the adsorptive removal of Acid Red 17 dye by surfactant-modified fuller's earth
Jasmin Shah;
Jasmin Shah
1Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan
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Muhammad Rasul Jan;
Muhammad Rasul Jan
1Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan
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Mian Muhammad;
2Department of Chemistry, University of Malakand, Khyber Pakhtunkhwa, Pakistan
E-mail: mianchem@uom.edu.pk
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Behisht Ara;
Behisht Ara
2Department of Chemistry, University of Malakand, Khyber Pakhtunkhwa, Pakistan
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Fahmeeda
Fahmeeda
1Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan
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Water Sci Technol (2017) 75 (6): 1410–1420.
Article history
Received:
September 01 2016
Accepted:
December 09 2016
Citation
Jasmin Shah, Muhammad Rasul Jan, Mian Muhammad, Behisht Ara, Fahmeeda; Kinetic and equilibrium profile of the adsorptive removal of Acid Red 17 dye by surfactant-modified fuller's earth. Water Sci Technol 23 March 2017; 75 (6): 1410–1420. doi: https://doi.org/10.2166/wst.2017.011
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