The evaluation of the biosorption of a sulfur brown gd from aqueous solutions by the recycled acid-washing activated sludge
Corressponding author's email:
anhnt@hcmute.edu.vnKeywords:
Activated sludge, Acid washing, Biosorption, Sulfur dye, AdsorptionAbstract
The protection of the environment through the recycling of waste brought back many economic-social benefits. Demand for the recycling of the large quantity of activated sludge derived from biological treatment stage of the wastewater treatment plant has become urgent in recent years. This study examined successfully the batch biosorption of Sulfur Brown GD on the recycled material prepared by the acid washing biomass of activated sludge. The correlation coefficients (r2) of both Langmuir and Freundlich isotherm parameters are higher than 0.91 with, and the estimated maximum adsorption capacity reached 7.99 mg/g. Besides, the kinetic parameters of the dye adsorption process is described suitably by the pseudo-second-order adsorption kinetics.
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