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Mechanism of Adsorption of Dyes and Phenols from Water Using Activated Carbons Prepared from Plum Kernels

✍ Scribed by Ruey-Shin Juang; Feng-Chin Wu; Ru-Ling Tseng

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
143 KB
Volume
227
Category
Article
ISSN
0021-9797

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✦ Synopsis

The kinetics and mechanism of adsorption of two commercial dyes (BR22, AB25), phenol, and 3-chlorophenol from water on activated carbons were studied at 30 β€’ C. The activated carbons were prepared from plum kernels, and the activation temperature and time tested were in the ranges 750-900 β€’ C and 1-4 h, respectively. Three simplified kinetic models including a pseudo-first-order, a pseudosecond-order, and an intraparticle diffusion model were tested. It was shown that the adsorption of both phenols could be fitted to a pseudo-second-order rate law, and that of both dyes could be fitted to an intraparticle diffusion model. Kinetic parameters were calculated and correlated with the physical properties of the adsorbents.

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