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Adsorption Studies of Organic Pollutants onto Activated Carbon

K.BALASUBRAMANI, N.SIVARAJASEKAR

Activated carbon was developed from coconut shell, characterized and used for the removal of Rhodamine-B from wastewater successfully. The methylene blue number, iodine number and BET surface area of the prepared carbon were found to be 80 mg g-1, 600 mg g-1, and 1200 m2 g-1 respectively. Rhodamine B is one of the water soluble, basic red cationic xanthene class dyes, a common water tracer fluorescent. Adsorption studies were carried out using Rhodamine B at different concentrations (150-400 mg g-1), pH (2-12), and adsorbent dose (1-3 g l-1). The adsorption data were correlated with both Langmuir and Freundlich models. The results indicated that the Freundlich model fitted the data better as compared to the Langmuir model .