REMOVAL OF ZINC FROM WASTEWATER USING DRIED ACTIVATED SLUDGE

The aim of present research was to investigate biosorption of dried activated sludge for the removal of Zn (II) ions from aqueous solution. Batch process for the biosorption of Zn (II) ions was conducted to determine equilibrium and adsorption characteristics of the biosolids. The Maximum biosorption of zinc from aqueous solutions with initial concentration of zinc (100 ppm) was 88.5% for 3.5 h contact time. Langmuir, Freundlich and Dubnin-Randkovich were applied to estimate biosorption capacity, intensity and energy. The experimental data were perfectly fitted to Langmuir and Freundlich proposed models. It was concluded that dried activated sludge had great potential to remove Zn (II) ions from the aqueous solutions at various concentrations of metal ions.

کلیدواژه ها:

Activated sludge ، Adsorption isotherm ، Biosorption ، Zinc ion