alexa Kinetics and diffusion processes in colour removal from effluent using wood as an adsorbent
Environmental Sciences

Environmental Sciences

Journal of Pollution Effects & Control

Author(s): Gordon McKay, Victor J P Poots

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The rates of adsorption of a basic dye, Astrazone Blue, and an acidic dye, Telon Blue, on wood have been studied. The rate controlling step is mainly intraparticle diffusion, although a small resistance due to a boundary layer is experienced. The activation energies for the adsorption of Astrazone Blue and Telon Blue on wood are 16.8 kJ mol−1 and 9.6 kJ mol−1, respectively. The diffusion coefficients vary from 6×10−13 cm2 s−1 to 18×10−13 cm2 s−1 for Astrazone Blue at 18°C and from 3 × 10−13 cm2 s−1 to 8 × 10−13 cm2 s−1 for Telon Blue at 18°C. The variation in diffusivities is attributed to boundary layer effects.

This article was published in Journal of Chemical Technology and Biotechnology and referenced in Journal of Pollution Effects & Control

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