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Comparative sorption kinetic studies of phenolic compounds on fly ash and impregnated fly ash
Author(s) -
Singh Binay K.,
Rawat Narendra S.
Publication year - 1994
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280610109
Subject(s) - fly ash , sorption , on the fly , environmental chemistry , chemistry , kinetic energy , environmental science , waste management , pulp and paper industry , chemical engineering , organic chemistry , adsorption , engineering , computer science , physics , operating system , quantum mechanics
The factors affecting the rate processes involved in the removal of phenolic compounds, e.g. initial phenol concentration, particle size, impregnation of fly ash (IFA), pH and temperature have been studied. The removal rate of phenols varied in the order p ‐nitrophenol m ‐nitrophenol > o ‐nitrophenol > p ‐cresol > phenol > m ‐cresol > o ‐cresol. The process followed first order rate kinetics. The sorption data generally fit the Lagergren equation and the intraparticle diffusion rate equation from which adsorption rate constants, diffusion rate constants and diffusion coefficients were determined. Intraparticle diffusion was found to be the rate‐limiting step. These kinetic parameters were compared for various phenols under different conditions using fly ash (FA) and impregnated fly ash (IFA).