Abstract:
This project proposed coffee husk as a raw material for production of activated carbon using
chemical activation process, the activating agent used in the activation process was phosphoric
acid. The effects of various preparatory conditions including different activation temperature
and pyrolysis time were investigated and characterized using proximate analysis to establish the
optimum conditions for adsorption of methylene blue by activated carbons from textile industry
waste. And the project focused on removal of methylene blue dye using activated carbon.
Adsorption studies were carried out using methylene blue at different concentrations (2-10 mg/l),
pH (1-10), adsorbent dose (0.4-1.2 g) and contact time (20-60 min). Studying through different
graphs of pH, contact time, adsorbent concentration and Methylene blue concentration, the
optimum values for each case at carbonization temperature of 600 oC; pH= 5; Contact time= 50
min; Adsorbent dosage= 0.8 gm; Methylene blue concentration= 20 mg/l. Finally the
experimental data were fitted into both Langmuir & Freundlich isotherms and also show pseudo
second order kinetics. Thus the activated carbon prepared from coffee husk could be used
extensively in removal of methylene blue dye from waste water.