[01] Milan M. Lakdawala, Chemistry Department, S. P. T. Arts and Science College, Godhra, Gujarat, India. [02] Yogesh S. Patel, Chemistry Department, Government Science College, Gandhinagar, Gujarat, India.

Pollution of soil and water by hazardous chemicals excreted from industries has become serious environmental concern. From the environmental and aesthetic point of view, removal of pollutants from effluent is extremely essential. Due to the organic loads, the treatment of removal efficiency is rather challenging by conventional methods. Therefore, adsorption process is found to be the most efficient method. Numerous approaches have been studied for the development of low–cost adsorbents. Zeolite is found to be the most effective and economical adsorbent. In the present study, zeolite with specific surface area of 2762.47cm2/gm was used for removal of biochemical oxygen demand from the combined waste water of sugar industry. The combined waste water of sugar industry is treated with different doses (i.e. 5 gm/L, 10 gm/L, 40 gm/L, 80 gm/L, 120 gm/L, 160 gm/L, 200 gm/L) of zeolite. With increase in dosage of zeolite, considerable decrease in biochemical oxygen demand was observed.

Zeolite, Adsorption, Freundlich Isotherm, Langmuir Isotherm

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