The kinetics, thermodynamic, and adsorption studies on removal of chromium(VI) from
aqueous and i... more The kinetics, thermodynamic, and adsorption studies on removal of chromium(VI) from aqueous and in presence of industrial solvents 2-methoxyethanol and 2-ethoxyethanol with macroporous resin Tulsion A-27 was studied at varying concentration of Cr(VI), adsorbent dosage, pH, contact time, and temperature. Batch shaking sorption experiments were carried out to evaluate the performance of Tulsion A-27(MP) anion exchange resin in the removal of Cr(VI) from aqueous and mixed aqueous solvents, 2-methoxyethanol and 2-ethoxyethanol. The concentrations of Cr(VI) in aqueous and mixed aqueous solvents were determined by UV-Visible spectrophotometer. As the adsorption process is pH dependent, it showed maximum removal efficiency of Cr(VI) in the pH range of 5–6 for an initial chromium concentration of 0.0011 M. Effect of temperature on the equilibrium constant was studied and the thermodynamic parameters were evaluated. Kinetic experiments revealed the dominance of adsorption. The sorption models, Langmuir and Freundlich adsorption isotherms, were discussed on amount of Cr(VI) uptake. The resin was analyzed by infrared spectroscopy and scanning electron microscopy before and after the adsorption process. The sorption of Cr(VI) by the anion exchange resin was reversible and so it has good potential for the removal/ recovery of Cr(VI) from aqueous and mixed aqueous solvents. The anion exchange resin can be used for the efficient removal of Cr(VI) from water and wastewater.
The exchange of monovalent anions perchlorate and nitrate against Cl– were investigated as a
func... more The exchange of monovalent anions perchlorate and nitrate against Cl– were investigated as a function of organic solvent compositions from aqueous to 80% mixed solvent media at 300 ± 1 K on strong base anion exchanger Tulsion A-27 (MP). Selectivity coefficients were determined over the wide range of resin mole compositions (NRB = 0 to 1) for the resin to understand the effect of organic solvents. The selectivity values of these anions in water-2-methoxy ethanol on Tulsion A-27 (MP) are higher than those compared with water-2-isopropoxy ethanol, water-2-butoxy ethanol and water-2-ethoxy ethanol and there is drastic change in the selectivity coefficient values for these anions in case of water-2-ethoxy ethanol at higher solvent compositions. Thermodynamics of ion exchange has shown that anion exchange is more in aqueous medium than in mixed solvent medium.
The kinetics, thermodynamic, and adsorption studies on removal of chromium(VI) from
aqueous and i... more The kinetics, thermodynamic, and adsorption studies on removal of chromium(VI) from aqueous and in presence of industrial solvents 2-methoxyethanol and 2-ethoxyethanol with macroporous resin Tulsion A-27 was studied at varying concentration of Cr(VI), adsorbent dosage, pH, contact time, and temperature. Batch shaking sorption experiments were carried out to evaluate the performance of Tulsion A-27(MP) anion exchange resin in the removal of Cr(VI) from aqueous and mixed aqueous solvents, 2-methoxyethanol and 2-ethoxyethanol. The concentrations of Cr(VI) in aqueous and mixed aqueous solvents were determined by UV-Visible spectrophotometer. As the adsorption process is pH dependent, it showed maximum removal efficiency of Cr(VI) in the pH range of 5–6 for an initial chromium concentration of 0.0011 M. Effect of temperature on the equilibrium constant was studied and the thermodynamic parameters were evaluated. Kinetic experiments revealed the dominance of adsorption. The sorption models, Langmuir and Freundlich adsorption isotherms, were discussed on amount of Cr(VI) uptake. The resin was analyzed by infrared spectroscopy and scanning electron microscopy before and after the adsorption process. The sorption of Cr(VI) by the anion exchange resin was reversible and so it has good potential for the removal/ recovery of Cr(VI) from aqueous and mixed aqueous solvents. The anion exchange resin can be used for the efficient removal of Cr(VI) from water and wastewater.
The exchange of monovalent anions perchlorate and nitrate against Cl– were investigated as a
func... more The exchange of monovalent anions perchlorate and nitrate against Cl– were investigated as a function of organic solvent compositions from aqueous to 80% mixed solvent media at 300 ± 1 K on strong base anion exchanger Tulsion A-27 (MP). Selectivity coefficients were determined over the wide range of resin mole compositions (NRB = 0 to 1) for the resin to understand the effect of organic solvents. The selectivity values of these anions in water-2-methoxy ethanol on Tulsion A-27 (MP) are higher than those compared with water-2-isopropoxy ethanol, water-2-butoxy ethanol and water-2-ethoxy ethanol and there is drastic change in the selectivity coefficient values for these anions in case of water-2-ethoxy ethanol at higher solvent compositions. Thermodynamics of ion exchange has shown that anion exchange is more in aqueous medium than in mixed solvent medium.
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aqueous and in presence of industrial solvents 2-methoxyethanol and 2-ethoxyethanol with
macroporous resin Tulsion A-27 was studied at varying concentration of Cr(VI), adsorbent
dosage, pH, contact time, and temperature. Batch shaking sorption experiments were carried
out to evaluate the performance of Tulsion A-27(MP) anion exchange resin in the removal of
Cr(VI) from aqueous and mixed aqueous solvents, 2-methoxyethanol and 2-ethoxyethanol.
The concentrations of Cr(VI) in aqueous and mixed aqueous solvents were determined by
UV-Visible spectrophotometer. As the adsorption process is pH dependent, it showed maximum
removal efficiency of Cr(VI) in the pH range of 5–6 for an initial chromium concentration
of 0.0011 M. Effect of temperature on the equilibrium constant was studied and the
thermodynamic parameters were evaluated. Kinetic experiments revealed the dominance of
adsorption. The sorption models, Langmuir and Freundlich adsorption isotherms, were discussed
on amount of Cr(VI) uptake. The resin was analyzed by infrared spectroscopy and
scanning electron microscopy before and after the adsorption process. The sorption of Cr(VI)
by the anion exchange resin was reversible and so it has good potential for the removal/
recovery of Cr(VI) from aqueous and mixed aqueous solvents. The anion exchange resin can
be used for the efficient removal of Cr(VI) from water and wastewater.
function of organic solvent compositions from aqueous to 80% mixed solvent media at 300 ± 1 K on
strong base anion exchanger Tulsion A-27 (MP). Selectivity coefficients were determined over the wide
range of resin mole compositions (NRB = 0 to 1) for the resin to understand the effect of organic solvents.
The selectivity values of these anions in water-2-methoxy ethanol on Tulsion A-27 (MP) are higher than
those compared with water-2-isopropoxy ethanol, water-2-butoxy ethanol and water-2-ethoxy ethanol and
there is drastic change in the selectivity coefficient values for these anions in case of water-2-ethoxy
ethanol at higher solvent compositions. Thermodynamics of ion exchange has shown that anion exchange
is more in aqueous medium than in mixed solvent medium.
aqueous and in presence of industrial solvents 2-methoxyethanol and 2-ethoxyethanol with
macroporous resin Tulsion A-27 was studied at varying concentration of Cr(VI), adsorbent
dosage, pH, contact time, and temperature. Batch shaking sorption experiments were carried
out to evaluate the performance of Tulsion A-27(MP) anion exchange resin in the removal of
Cr(VI) from aqueous and mixed aqueous solvents, 2-methoxyethanol and 2-ethoxyethanol.
The concentrations of Cr(VI) in aqueous and mixed aqueous solvents were determined by
UV-Visible spectrophotometer. As the adsorption process is pH dependent, it showed maximum
removal efficiency of Cr(VI) in the pH range of 5–6 for an initial chromium concentration
of 0.0011 M. Effect of temperature on the equilibrium constant was studied and the
thermodynamic parameters were evaluated. Kinetic experiments revealed the dominance of
adsorption. The sorption models, Langmuir and Freundlich adsorption isotherms, were discussed
on amount of Cr(VI) uptake. The resin was analyzed by infrared spectroscopy and
scanning electron microscopy before and after the adsorption process. The sorption of Cr(VI)
by the anion exchange resin was reversible and so it has good potential for the removal/
recovery of Cr(VI) from aqueous and mixed aqueous solvents. The anion exchange resin can
be used for the efficient removal of Cr(VI) from water and wastewater.
function of organic solvent compositions from aqueous to 80% mixed solvent media at 300 ± 1 K on
strong base anion exchanger Tulsion A-27 (MP). Selectivity coefficients were determined over the wide
range of resin mole compositions (NRB = 0 to 1) for the resin to understand the effect of organic solvents.
The selectivity values of these anions in water-2-methoxy ethanol on Tulsion A-27 (MP) are higher than
those compared with water-2-isopropoxy ethanol, water-2-butoxy ethanol and water-2-ethoxy ethanol and
there is drastic change in the selectivity coefficient values for these anions in case of water-2-ethoxy
ethanol at higher solvent compositions. Thermodynamics of ion exchange has shown that anion exchange
is more in aqueous medium than in mixed solvent medium.