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Packed bed column adsorption of oil and grease from refinery desalter effluent, using rice husks derived carbon as the adsorbent: Influence of process parameters and Bohart–Adams kinetics study

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Umembamalu C. J., Igwegbe C. A., Osuagwu E. U., Nwabanne J. T.

World News of Natural Sciences

2020

vol. 31

155-174

Oil and grease (O&G) adsorption in a packed bed column, using adsorbent prepared from rice husks wastes, was investigated. The effects of adsorbent particle size (150, 300, and 600 µm), initial adsorbate concentration (200, 300, and 400 mg/L), and bed height (100, 200, and 300 mm) on the performance of column adsorption for O&G removal and breakthrough time were investigated in the packed column experiments at a constant flow rate of 10.5 mL/min. The kinetic behavior of the column adsorption process was analyzed using the Bohart–Adams model. The kinetic data fitted the model very well. The rate constant (mass transfer coefficient) for Bohart–Adams model (KAB) increased with the decrease in adsorbent particle size and initial ion concentration but was higher at the bed height of 200 mm. The maximum adsorption capacity (No) increased with a decrease in particle size and initial ion concentration but increased with an increase in the bed height. The rate constant for Bohart–Adams model decreased with an increase in adsorbent size and initial concentration, and was higher at the bed height of 200 mm. The time required for 90% breakthrough decreased with increase in the flow rate, bed height, and initial ion concentration. The model results of the O&G breakthrough curve concentration have shown a fairly good agreement with experimental results. This analysis, considering the adsorbent’s particle size, feed concentration, and bed heights indicated that the packed bed unit could be used for the treatment of O&G effluent to reduce the difficulties of oil refineries in Nigeria and other countries.

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1 World News of Natural Sciences

1 2020

1 Igwegbe C. A.

1 Nwabanne J. T.

1 Osuagwu E. U.

1 Umembamalu C. J.

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Packed bed column adsorption of oil and grease from refinery desalter effluent, using rice husks derived carbon as the adsorbent: Influence of process parameters and Bohart–Adams kinetics study