ADSORPTION NAPHTOL GREEN B ON ACTIVATED CARBON F-300

In the present study, the sorptive capacity of activated carbon F-300 in the removal of dyes from textile wastewaters, was estimated. Dye - naphtol green B - were chosen to study, and as adsorbent we have chosen the activated carbon F-300, virgin and regenerated. Fenton reagent, which is good oxidant, was used for activated carbon regeneration. The iodine number, which was measured according to the directive PN-83 C-97555.04, was used to evaluate sorptive capacity of regenerated activated carbon. Dye concentration was 400 mg/dm(3). Sorption abilities of activated carbon were expressed by mass balance relationship in case of fresh activated carbon it was 21 mg/g, and after regeneration - from 22 mg/g to 33 mg/g. The highest removal efficiency was 88 % (carbon after 4th regeneration), the lowest - 74 % for virgin carbon. The experimental data adsorption isotherms were defined. Adsorption theoretical models Freundlich or Langmuir were selected. The value of the correlation coefficient (r(2)) showed better fit to Langmuir model. The experimental data shows that chosen activated carbon can be used for the decontamination of dyes from textile wastewater. However, model tests need to be verified on real wastewater samples.