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Biosorption of reactive dyes by dried activated sludge: equilibrium and kinetic modelling
Aksu1
1Chemical Engineering Department, Hacettepe University, 06532 Beytepe, Ankara, Turkey
Biochemical Engineering Journal
|January 11, 2001
Abstract:
The biosorption of reactive dyes (Reactive Blue 2 - RB2 and Reactive Yellow 2 - RY2) onto dried activated sludge was investigated. The dye binding capacity of biosorbent was shown as a function of initial pH, initial dye concentration and type of dye. The equilibrium data fitted very well to both the Freundlich and Langmuir adsorption models. The results showed that both the dyes uptake processes followed the second-order rate expression.