Journal
PETROLEUM SCIENCE AND TECHNOLOGY
Volume 37, Issue 10, Pages 1143-1154Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10916466.2019.1578797
Keywords
adsorption; bio-material; coconut coir; Lasani sawdust; used motor oil
Funding
- Department of Chemistry, University of Karachi
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In this article, two bio-sorbents have been selected: lasani sawdust (LS) (a new bio-based material) and coconut coir (CC) for the removal of used motor oil from the aqueous phase. The physical nature of the materials was characterized using Fourier Transform Infrared Spectroscopy and Constitutional Analysis of lignin and cellulose. The adsorption process was evaluated using various kinetic and adsorption models. The evaluated sorption capacities for coconut coir and lasani sawdust were 12.82 g g(-1) and 0.36 g g(-1), respectively. Maximum sorption of oil from the aqueous solution conveniently took place in 20 minutes. To ascribe statistically which model describes the adsorption phenomenon best, Root Mean Square Error (RMSE) and Average Relative Error (ARE) were used. The kinetics of the adsorption was best described by Pseudo-second order. Similarly, Langmuir isotherm model had the least value for the two error functions and a higher q(max) value for coir than for lasani. It was concluded that the increased absorptive ability of coir over lasani was due to the difference in the composition of lignin and cellulose of the two materials. [GRAPHICS] .
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