Esterified Durian Peel Adsorbents with Stearic Acid for Spill Removal

Abstract

The treatment of oil spill using natural adsorbents is considered as an eco-friendly and cost-effective way. Agriculture waste is preferred as an oil cleanup technology due to its biodegradation and buoyancy. The goal of this study is to examine the diesel oil adsorption efficiency, the capacity of raw peels and stearic acid esterified peels for three durian types: Ri6, CB, and 6H, which are the most popular in Vietnam. The oil adsorption capacity in artificial oil-polluted water depends on the oil content, particle size, and adsorption time. Analytical techniques of durian peel, such as microstructure and morphology using FTIR spectrometry and scanning electron microscopy are also studied. The result shows that Ri6 raw powder has the highest oil adsorption capacity. The oil adsorption capacity of raw and esterified durian peels are 0.2340 g/g and 0.3780 g/g. The results explain that the best conditions were established at 0.15 - 0.3 mm particle size of modified absorbents and pH ranging from 6.5 - 9.3 for 20min. Adsorption capacity of esterified durian peel absorbent confirms to a Langmuir isotherm adsorption line with maximum adsorption capacity of 453.9 mg/g.