Oleh: Sri Redjeki, Foliatini (Akademi Kimia Analisis Bogor)

The majority of azo dyes, including Tartrazine and Carmoisine, are mutagenic and carcinogenic to human as well as to animals, so the removal of this hazardous industrial effluents is one of the growing needs of the present time. Adsorption process is among the most effective techniques for this purpose. In the present work, experiments on the removal Tartrazine and Carmoisine were carried out using activated carbon from tamarind seed and seed coat. Three different activation methods (acid, base, neutral) were used for preparation of tamarind seed biosorbents. A fixed bed column test was conducted to simulate the actual condition of adsorption in a continuous manner. Efficiency of biosorption was investigated at different adsorbate concentration and contact time. The results showed that increasing adsorbate concentration and contact time could increase efficiency until equilibrium was reached. This study revealed that tamarind seed coat was the most effective biosorbent for removal Tartrazine and Carmoisine with maximum efficiency of 99,9 %.

Key words : tamarind seed, adsorption, Tartrazine, Carmoisine

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