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ABSTRACT
Adsorption process involving the use of activated carbon from coconut shell as adsorbent was employed for the removal of crystal violet dye from textile industry effluent. The coconut shell was processed into activated carbon by carbonizing at 600 oC and activated with 60% phosphoric acid. The synthetic stock solution of crystal violet dye was prepared by dissolving 2g of the powder in 1liter of distilled water. The adsorption processes were carried out by varying the initial concentration from 10mg/L to 60mg/L; contact time of 10min to 60min; adsorbent dosage of 0.2g to 1.2g; pH values of 4 to 10 to optimize the condition for maximum adsorption. The samples were analyzed using the visible spectrophotometer of wavelength 480nm. Maximum adsorption of 42% was obtained at a adsorbent dosage of 1.2g, 40% removal was obtained at contact time of 30min, 94% adsorption was obtained at initial concentration of 20mg/L, 45% adsorption was obtained at pH of 10, Langmuir model proved to be the best adsorption isotherm. Coconut shell shows a promising performance of agro waste as a filter for dye removal.
