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Removal of chromium(III) from tannery effluents, using a system of packed columns of zeolite and activated carbon
Author(s) -
Covarrubias Cristian,
Arriagada Renán,
Yáñez Jorge,
García Rafael,
Angélica Maria,
Barros SD,
Arroyo Pedro,
SousaAguiar Eduardo Falabella
Publication year - 2005
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.1259
Subject(s) - zeolite , chromium , activated carbon , adsorption , chemistry , carbon fibers , ion exchange , effluent , inorganic chemistry , powdered activated carbon treatment , chemical engineering , materials science , waste management , catalysis , ion , organic chemistry , composite material , composite number , engineering
The removal of chromium(III) in packed columns of zeolite and activated carbon has been studied. The process of Cr(III) exchange in 13X zeolite was optimized using mass transference parameters. In addition, the effects of pH, the presence of interfering ions and the anion associated with the chromium in the solution were studied. It was found that particle diameter controls the Cr(III) exchange in the zeolite, indicating that particle diffusion predominantly controls the process of Cr(III) exchange in 13X zeolite. A mixed system of zeolite and activated carbon columns increased the efficiency of chromium removal from diluted wastewater. This effect occurred due to the reduction of the organic matter (chemical oxygen demand), adsorption of chromium, and interfering ions on the activated carbon column. The activated carbon + zeolite column system emerges as an alternative method in Cr(III) removal from tannery effluents. Copyright © 2005 Society of Chemical Industry