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The use of toxic solid waste for the adsorption of dyes from waste streams
Author(s) -
Saravanabhavan Subramani,
Sreeram Kalarical Janardhanan,
Raghava Rao Jonnalagadda,
Unni Nair Balachandran
Publication year - 2007
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.1687
Subject(s) - adsorption , freundlich equation , chromium , langmuir , municipal solid waste , langmuir adsorption model , wastewater , chemistry , waste stream , waste management , chemical engineering , materials science , pulp and paper industry , environmental science , environmental engineering , organic chemistry , engineering
The use of chromium‐containing toxic solid wastes from the leather industry for the removal of dyes from waste‐waters has been studied. A batch adsorption model has been employed and the role of various experimental parameters on the efficiency of the process evaluated. The extent of dye removal was studied by varying parameters such as pH, contact time, initial concentration of the dye and amount of adsorbent. The experimental equilibrium data for this system has been analyzed using the linearized forms of Langmuir and Freundlich isotherms. The Langmuir isotherm was found to provide the best theoretical correlation of the experimental data and the adsorption was found to follow pseudo‐second‐order kinetics. The dye adsorbed solid wastes were used for the preparation of pigments. In essence, this study provides a greener solution for chromium‐containing solid wastes, dye containing waste‐waters and dye‐adsorbed chromium solid wastes. Copyright © 2007 Society of Chemical Industry