COMPARATIVE STUDY OF SINGLE AND MIXTURE OF ADSORBENTS ON EFFICIENCY OF ADSORPTION

Abstract

Dyes are coloured compounds which are widely used in textiles, printing, rubber, cosmetics, plastics, leather industries to colour their products resulting in a large amount of coloured wastewater. Decolourization of waste water from textile and manufacturing industries is a major challenge for environmental managers as dyes are water soluble and produce very bright colours in water with acidic properties. This research attempts to compare the efficiencies of single and mixtures of adsorbents (Citrullus lanatus Peel, Citrullus lanatus Rind and Citrus limetta Peel) in decolourizing Crystal Violet and Brilliant Green dyes. Single adsorbent Citrus limetta Peel is effective in decolourizing Crystal Violet and Brilliant Green dyes at 50 mg/L to 94.72% and 57.29% respectively. Also Citrullus lanatus Rind decolourizes Crystal Violet dye to 52.48% at 50mg/L. Mixture of adsorbents Citrullus lanatus Peel + Citrus limetta Peel are effective in decolourizing both Crystal Violet and Brilliant Green dyes at 50 mg/L to 42.55% and 67.71% respectively and Citrullus lanatus Rind + Citrus limetta Peel can decolourize Crystal Violet and Brilliant Green dyes at 125 mg/L to 64.47% and 46.63% respectively. Citrullus lanatus Peel + Citrullus lanatus Rind can remove 41.61% of Crystal Violet dye at 50 mg/L and 58.69% of Brilliant Green dye at 125 mg/L.