Thermodynamics and Kinetics of the Adsorption for Phenanthrene onto CTMA-Bentonite in Aqueous Solutions

Abstract:

The adsorption thermodynamic and kinetic parameters of phenanthrene onto CTMA-bentonite were studied. The result shows that adsorption equilibrium time at their initial concentrations of 2 mg.L^-1 and 6 mg. L^-1 is 110 min. The dynamical data for the organoclay fit well with pseudo-second-order kinetic model at 303-333 K. The adsorption rates was found higher with the temperature increased, but its sorption extent was lower. Thermodynamic parameters such as ΔG⁰, ΔH⁰, ΔS⁰ were also evaluated. The overall adsorption process was spontaneous, exothermic physisorption. The isotherms for phenanthrene on the organoclay are linear and showed that partitioning was the dominant mechanism of phenanthrene on CTMA-bentonite.

• Periodical: Advanced Materials Research (Volumes 233-235)
• Pages: 1089-1092
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.233-235.1089
• Online since: May 2011
• Authors: Jian Min Ren
• Keywords: Adsorption, CTMA, Phenanthrene

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