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Plant poisoning brilliant green dye adsorption on sawdust from aqueous solution and its recovery

C.Kannan, N.Buvaneswari

The organic dye pollution directly affects the soil, water and plants. The plant poisoning effect had been studied by the adsorption of cationic Brilliant green dye on raw sawdust from aqueous solution. The sawdust is a cellulose material (basic surface). The dye adsorption on the basic surface is correlated with experimental conditions. The experimental conditions like contact time, concentration of dye solution, temperature, dosage of adsorbent and particle size were optimized for maximum uptake and observed that the adsorption increased with increase of contact time (6h), temperature(30-70ºC) and dosage of the adsorbent. The concentration effect was studied from 100 to 500ppm and observed that the percentage of adsorption decreased with increase of dye concentration. The adsorption increased with decrease of particle size (0.6-1.0mm). The recovery of the dye was studied in water, methanol and ethanol. The desorption tendency of dye is in the increasing order of water (5%)