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APPLICATION OF ACTIVATED CARBON PREPARED FROM OLIVE STONES IN THE REMOVAL OF TWO BASIC DYES FROM WATER


Souad Najar-Souissi
Abdelmottaleb Ouederni
Abdelhamid Ratel

Abstract

Olive stones is produced in large quantities during the manufacture process of the olive oil in the Tunisian oleic industry. This by-product. have been converted to granular activated carbon by carbonisation in the nitrogen atmosphere followed by steam activation. Activated carbon so obtained with 1150 m2/g specific surface area and 0,53 cm3/g pore volume, essentially microporous, has been used for the adsorption of two basic dyes: Methylene Blue (MB) and Rhodamine B (RB) in aqueous solution. The equilibrium adsorption isotherms of the two dyes at 30°C shows Langmuir shape. The maximum adsorption capacity of MB and RB are found to be 303 mg/g and 217 mg/g respectively. Adsorbent affinity to tested dyes is related to electric and steric effects.


KEY WORDS: Olive stones, activated carbon, Methylene Blue, Rhodamine B, adsorption


Global Jnl Pure & Applied Sciences Vol.10(1) 2004: 91-94

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eISSN: 2992-4464
print ISSN: 1118-0579