title: Equilibrium and kinetic adsorption study of Basic Yellow 28 and Basic Red 46 by a boron industry waste.
abstract: In this study, the adsorption characteristics of Basic Yellow 28 (BY 28) and Basic Red 46 (BR 46) onto boron waste (BW), a waste produced from boron processing plant were investigated. The equilibrium adsorption isotherms and kinetics were investigated. The adsorption equilibrium data were analyzed by using various adsorption isotherm models and the results have shown that adsorption behavior of two dyes could be described reasonably well by a generalized isotherm. Kinetic studies indicated that the kinetics of the adsorption of BY 28 and BR 46 onto BW follows a pseudo-second-order model. The result showed that the BW exhibited high-adsorption capacity for basic dyes and the capacity slightly decreased with increasing temperature. The maximum adsorption capacities of BY 28 and BR 46 are reported at 75.00 and 74.73mgg(-1), respectively. The dye adsorption depended on the initial pH of the solution with maximum uptake occurring at about pH 9 and electrokinetic behavior of BW. Activation energy of 15.23kJ/mol for BY 28 and 18.15kJ/mol for BR 46 were determined confirming the nature of the physisorption onto BW. These results indicate that BW could be employed as low-cost material for the removal of the textile dyes from effluents.
authors.affiliation: Department of Chemistry, Faculty of Arts and science, University of Dumlupinar, Kütahya, Turkey. aolgun@dumlupinar.edu.tr
authors.forename: Asim
authors.initials: A
authors.lastname: Olgun
authors.forename: Necip
authors.initials: N
authors.lastname: Atar
mesh_terms: D000327:Adsorption; D001391:Azo Compounds / Q000032:analysis* / Q000737:chemistry; D001895:Boron / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D012995:Solubility; D013696:Temperature; D013816:Thermodynamics; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D001391:Azo Compounds; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; C516484:basic yellow 28; C050846:basic red 46; D001895:Boron