Extraction and adsorption behavior of Co(II) on HTTA-impregnated polyurethane foam

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496399408002195· OSTI ID:96720

Saeed, M M; Rusheed, A ^[1]; Ahmed, N ^[2]

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1. Pakistan Institute of Nuclear Science & Technology, Islamabad (Pakistan)
2. Quaid-E-Azam Univ., Islamabad (Pakistan); and others

The batch extraction of Co(II) from aqueous solutions with open cell polyethertype HTTA-loading polyurethane (PU) foam has been studied using a radiotracer technique. The effect of pH, shaking time, and loading capacity has been investigated. The membrane properties of loading PU foam sorbent offer unique advantage of adsorption. The fundamental studies of adsorption show that the classical Freundlich and Langmuir isotherms are followed in the entire concentration range of a 10{sup {minus}5} to 10{sup {minus}2} M solution of cobalt. The sorption mean free energy from the Dubinin-Radushkevich isotherm is found to be 13.8 kJ{center_dot}mol{sup {minus}1} and the loading capacity 4.44 mg{center_dot}g{sup {minus}1}, suggesting that the ion-exchange or chemisorption mechanism operates. The kinetic parameters of adsorption also support a chemisorption mechanism and the first-order rate law. The rate constants and activation energies of sorption and desorption have been evaluated. The thermodynamic function of adsorption of {Delta}H, {Delta}S, {Delta}G, and equilibrium constant K{sub C} have been calculated. The process of adsorption is established to be endothermic and chemisorption, stabilized through thermodynamic functions.

• Sponsoring Organization: USDOE
• OSTI ID: 96720
• Journal Information: Separation Science and Technology, Vol. 29, Issue 16; Other Information: PBD: Oct 1994
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
40 CHEMISTRY
05 NUCLEAR FUELS
COBALT
ADSORPTION
POLYURETHANES
PERFORMANCE
LIQUID WASTES
PH VALUE
SEPARATION PROCESSES
FOAMS
MEMBRANES
COBALT 60
TRACER TECHNIQUES
DIFFUSION
ACTIVATION ENERGY
TEMPERATURE DEPENDENCE
AQUEOUS SOLUTIONS
WASTE PROCESSING