Kinetic and equilibrium profile of the adsorptive removal of Acid Red 17 dye by surfactant-modified fuller's earth.
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-1at 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.
Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan.
Jasmin
J
Shah
Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan.
Muhammad Rasul
MR
Jan
Department of Chemistry, University of Malakand, Khyber Pakhtunkhwa, Pakistan E-mail: mianchem@uom.edu.pk.
Mian
M
Muhammad
Department of Chemistry, University of Malakand, Khyber Pakhtunkhwa, Pakistan E-mail: mianchem@uom.edu.pk.
Behisht
B
Ara
Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan.
Fahmeeda
F
Fahmeeda
D000327:Adsorption; D017607:Aluminum Compounds / Q000737:chemistry*; D004058:Diffusion; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D017616:Magnesium Compounds / Q000737:chemistry*; D009994:Osmolar Concentration; D012235:Rhodamines / Q000302:isolation & purification*; D017640:Silicates / Q000737:chemistry*; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013501:Surface-Active Agents / Q000737:chemistry*; D013816:Thermodynamics; D013818:Thermogravimetry; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification
D017607:Aluminum Compounds; D017616:Magnesium Compounds; D012235:Rhodamines; D017640:Silicates; D012996:Solutions; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; C022027:lissamine rhodamine B; D012967:Sodium Dodecyl Sulfate; C001262:Fuller's Earth