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Adsorptive Recovery of Crude Oil Microdroplets from Wastewater Using Surface Engineered Sponges

preprint
submitted on 31.08.2019 and posted on 04.09.2019 by Pavani Cherukupally, Wei Sun, Anabelle P.Y. Wong, Daryl R. Williams, Geoffrey A. Ozin, Amy M. Bilton, Chul Park
In the US, the oil industry produces over 15 billion barrels of wastewater contaminated with crude oil microdroplets annually. Current technologies are unable to remove these microdroplets at different pH conditions. Herein, an innovative surface engineered sponge (SenS) was designed by combining surface chemistry, surface charge, roughness, and surface energy. Under all pH conditions, the SEnS rapidly adsorbed oil microdroplets with 95-99% removal efficiency. The adsorbed oil was recovered at ambient conditions while the cleaned SEnS was reused for five times for crude oil adsorption. Due to the process efficacy, sponge reuse, and oil recovery, this adsorptive-recovery method using SEnS demonstrates great potential for the industrial recovery of oil from wastewater.

Funding

Natural Sciences and Engineering Research Council of Canada (NSERC DG 154279-2010)

Natural Resources Canada Oil Spill Response Program (OSRS2-011)

History

Email Address of Submitting Author

p.cherukupally17@imperial.ac.uk

Institution

Imperial College London

Country

United Kingdom

ORCID For Submitting Author

0000-0001-8589-4784

Declaration of Conflict of Interest

The authors declare no competing financial interest. We have filed for a patent on this work.

Version Notes

This version was submitted to Nature Sustainability on 2 April 2018.

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