Diethyl phthalate removal from aqueous phase using poly(EGDMA-MATrp) beads: Kinetic, isothermal and thermodynamic studies
Date
2015-07-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor & Francis
Abstract
In this study, poly(ethylene glycol dimethacrylate-N-methacryloyl-l-tryptophan methyl ester) [poly(EGDMA-MATrp)] beads (average diameter = 106-300 mu m), which were synthesized by co-polymerizing of N-methacryloyl-l-tryptophan methyl ester (MATrp) with ethylene glycol dimethacrylate (EGDMA), were used for diethyl phthalate (DEP) adsorption. The various factors affecting the adsorption of DEP from aqueous solutions such as pH, initial concentration, contact time and temperature were analysed. Adsorption behaviour of DEP on the poly(EGDMA-MATrp) beads was investigated by varying pH values of solution, contact time, initial concentration and temperature. An optimum adsorption capacity of 590.7 mg/g for DEP was obtained at 25 degrees C. The present adsorption process obeyed a pseudo-second-order kinetic model. All the isotherm data can be fitted with the Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. Thermodynamic parameters Delta H = 7.745 kJ/mol, Delta S = 81.92 J/K/mol and Delta G = -16.69 kJ/mol to -18.31 kJ/mol with the rise in temperature from 25 degrees C to 45 degrees C indicated that the adsorption process was endothermic and spontaneous.
Description
Keywords
Environmental sciences & ecology, Adsorption, Diethyl phthalate, Polymer, Removal, Endocrine-disrupting compounds, Waste-water, Activated carbon, Dimethyl phthalate, Potential-theory, Basic dye, Adsorption, Esters, Adsorbents, Gases, Sorption, Diethyl phthalate, Aliphatic compounds, Amino acids, Endocrine disrupters, Esters, Ethylene, Ethylene glycol, Isotherms, Polymers, Polyols, Removal, Temperature, Adsorption capacities, Initial concentration, Ethylene glycol dimethacrylate, Pseudo-second-order kinetic models, Thermodynamic parameter, Thermodynamic studies, Aqueous solution, Endocrine disruptor, Ester, Isotherm, pH, Phthalate, Pollutant removal, Polymer, Temperature effect, Thermodynamics
Citation
Ozer, E. T. vd. (2015). "Diethyl phthalate removal from aqueous phase using poly(EGDMA-MATrp) beads: Kinetic, isothermal and thermodynamic studies". Environmental Technology (United Kingdom), 36(13), 1698-1706.