Generally, plant fibres showed a stronger affinity for water than for oil. Pore size and its distribution have the ability to speed up the oil drops created by capillary action, giving high absorptivity towards oil. Changes in the material’s pore structure may have an impact on sorption capacity. ANOVA analysis showed no significant difference between untreated and treated samples ( p > 0.9999). The reduced hydrophobicity and oleophilicity of the sorbents may explain this phenomenon. However, the amount of water absorbed by untreated CG was higher by 1.64%. In addition, treated CG has a reduced sorption capacity of 1.01 g/g compared to untreated CG, which has a sorption capacity of 1.06 g/g. The graph demonstrated that treated CG absorbed 6% greater oil than untreated CG with 40.16% and 34.16%, respectively.

Due to excessive moisture absorption and low wettability, untreated CG has insufficient adhesion between the fibres and matrix. The percentage of oil absorbed by untreated CG was 34.17% and 40.17% for treated CG, respectively. This study may provide an insight into the usefulness of a statistical approach to maximise the oil absorption of cogon grass as an oil sorbent.įigure 2 shows the percentage of oil absorbed by two different samples of CG untreated and treated before sorption. Validation of the RSM model yielded 93.54% efficiency with 22.45 mL oil absorbed at 128 ☌ temperature and 36 ( v/ v)% oil concentration while keeping packing density and time constant at 30 min and 0.20 g/cm 3, respectively. After treatment and oil absorption, the FTIR method indicated new formation and deformation of functional groups, while SEM revealed changes in the surface and texture of cogon grass, including a roughened and jagged surface. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analysis were used to characterise cogon grass. Temperature and oil concentration are two important variables in the oil absorption process. The effects of temperature, time, packing density and oil concentration on oil absorption efficiency were investigated and optimised utilising one-factor-at-a-time (OFAT) and response surface methodology (RSM) approaches. Imperata cylindrica, often known as cogon grass, is a low-cost and useful sorbent for absorbing oil and optimising processes.

Imperatum ag