Abstract
The research aims to determine the adsorption ability and modeling of adsorption kinetics to purify used cooking oil using natural and carbonized corn cob adsorbent, which is economical, efficient, and sustainable due to its low price, renewability, and simplicity. Samples of used cooking oil were taken as much as 100 ml with an adsorbent mass of 3 g and particle size of 50 mesh and stirred using a shaker. Based on the results, it was found that the effect of carbonization was able to reduce the turbidity of used cooking oil, whereas for the use of natural corn cob adsorbent, at 20 minutes, turbidity of 59.0 NTU was obtained and 45.2 NTU was obtained after the adsorption process for 5 hours, while for the use of corn cob carbon adsorbent, a turbidity of 62.8 NTU was obtained for the same adsorbent size and 39.8 NTU was obtained after the adsorption process for 5 hours. Chemical interaction trends were also obtained, as shown in the second-order pseudo graph with coefficient of determination (R2) values close to 1 using natural corn cob and corn cob carbon adsorbents, namely 0.9965 and 0.9959.
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