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Heavy Oil Storage Tanks Clean-up Using Biosurfactants and Investigation of the Synergistic Effect with Silica Nanoparticles

Reinigung von Schweröl-Lagertanks mit Biotensiden und Untersuchung des synergistischen Effekts mit Siliciumdioxid-Nanopartikeln
Reyhaneh Azodi Abadshapouri, Hossein Amani, Reza Hajimohammadi and Hadi Soltani


In this study, the synergistic effect of silica nanoparticle and biosurfactants on oil storage tank clean up was investigated. Rhamnolipid, saponin and silica nanoparticles were used to recover oil from refinery oily sludge in laboratory experiments. From our results, the optimum HLB value for the extraction process was about 10.5 for the mixture of 62.5% of rhamnolipid and 37.5% of saponin. Our results also showed that the simultaneous use of the biosurfactants and nanoparticles results in a synergistic effect that significantly enhances the process efficiency. Maximum yield of oil residual was obtained about 4% at the optimum condition (HLB value of 10.5 for mixture of the biosurfactants and 3 g/l of silica nanoparticles). The results of present study showed that this method has the potential for industrial applications and may be used in oil recovery from oily sludge.


In dieser Studie wurde der synergistische Effekt von Siliciumdioxid (Silica)-Nanopartikeln und Biotensiden bei der Reinigung von Öllagertanks untersucht. Rhamnolipid, Saponin und Silica-Nanopartikel wurden in Laborexperimenten zur Rückgewinnung von Öl aus öligem Raffinerieschlamm eingesetzt. Aus unseren Ergebnissen ging hervor, dass der optimale HLB-Wert für den Extraktionsprozess bei etwa 10,5 für die Mischung aus 62,5% Rhamnolipid und 37,5% Saponin lag. Unsere Ergebnisse zeigten ebenfalls, dass die gleichzeitige Verwendung der Biotenside und Nanopartikel zu einem synergistischen Effekt führt, der die Effizienz des Prozesses deutlich erhöht. Die maximale Ausbeute an Ölrückständen wurde unter der optimalen Bedingung (HLB-Wert von 10,5 für die Mischung aus den Biotensiden und 3 g/l Silica-Nanopartikel) mit etwa 4% erreicht. Die Ergebnisse der vorliegenden Studie zeigen, dass diese Methode das Potenzial für industrielle Anwendungen hat und für die Ölrückgewinnung aus ölhaltigem Schlamm eingesetzt werden kann.

Professor Reza Hajimohammadi Department of Chemical Engineering Ahar Branch Islamic Azad University Ahar Iran Tel: +984144228211, +989144066327


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Received: 2020-11-10
Accepted: 2021-02-02
Published Online: 2021-07-29
Published in Print: 2021-07-31

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