PRELIMINARY STUDY OF RESPONSE SURFACE METHODOLOGY FOR OPTIMIZATION OF OIL REMOVAL BY ADSORBENT-BASED PINEAPPLE PEEL WASTE

Abstract

The developing of oil industry these days caused the increasing of oil pollution. Hence, studies have been carried out to improve the environment through natural resources as an adsorbent to manage oil pollution. Pineapple peel waste was used in this study as the adsorbent in removing cooking and lubricant oil wastes in aqueous solution. The experimental design using response surface method (RSM) was applied to determine the optimum conditions such initial dosage of adsorbent, volume of oil and soaking time. The initial amounts of adsorbent used in the experiment were 0.2 g, 0.6 g and 1.0 g with different soaking time of 40 minutes, 25 minutes and 10 minutes. The volumes of oil used in this experiment were 5 mL, 17.5 mL, and 30 mL. The optimum conditions of cooking oil adsorption were 39.97 minutes for contact time, 0.61 g for adsorbent dosage and 29.96 mL for volume of oil and the percentage of oil adsorption calculated at these conditions was found to be 357.468 % while the optimum conditions of lubricant oil adsorption were 39.48 minutes for contact time, 0.20 g for adsorbent dosage and 5.03 mL for volume of oil. The percentage of oil adsorption calculated at these conditions was found to be 755.498 %. From the result, it showed that pineapple peel waste can adsorb both cooking oil and lubricant oil wastes.