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ISOTHERM AND KINETIC STUDIES OF RESIDUAL OIL ADSORPTION FROM PALM OIL MILL EFFLUENT (POME) USING BOILER FLY ASH
Autori: Jude C. Igwe, Stella N. Anioke, Uche Arukwe
Data aparitiei: March 2013
Revista: Environmental Engineering and Management JournalVol. 12Nr. 3
ISSN: 1843 - 3707
Pret: 25.00 RON    
N.A.
Abstract
The removal of residual oil from palm oil mill effluent (POME) using boiler fly ash was studied in this paper, with focus on the
adsorption isotherms and kinetic studies by measuring the residual oil concentration using UV-spectrophotometer. The percent
residual oil adsorbed decreased from 80% to 5% as contact time was increased from 10 mins to 120 mins but increased from
2.74% to 72.98% as initial concentration of residual oil increased from 0.04812 mg/L to 0.2406 mg/L. Pseudo-second order
kinetic model gave a better fit to the sorption kinetic data and the adsorption of residual oil was found to follow chemisorptions
mechanism. The equilibrium sorption data showed a linear relationship and among the six sorption isotherms used for analysis of
equilibrium data, the Langmuir isotherm gave the best fit with R2 value of 0.9989. The trend of fitness of the isotherms was
found as; Langmuir>Smith>Temkin>Dubinin-Radushkevich>Harkins-Jura>Freundlich. The Langmuir dimensionless constant
(RL) showed that the sorption process was favourable. The maximum monolayer sorption capacity was found to be 0.3476 mg/g.
Therefore, this study showed that waste boiler fly ash could be used as a good adsorbent for removal of residual oil from POME.
This will help in the achievement of a zero discharge layout for palm oil mills.




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