Issue 10, 2018

Recyclable amine-functionalized magnetic nanoparticles for efficient demulsification of crude oil-in-water emulsions

Abstract

Produced water from the oil and gas industry often contains stable crude oil-in-water emulsions that are typically difficult to treat with conventional separation methods. Amine-functionalized nanoparticles have demonstrated effective destabilization of crude oil-in-water emulsions by associating with natural surfactants present at the oil–water interface leading to separation of oil from water under an external magnetic field. Effects of magnetic demulsifier concentration, reaction time and initial oil content of emulsion on the demulsification efficiency were investigated. The demulsification efficiency of emulsions can reach as high as 99.7% by the magnetic demulsifier. Our findings characterize the demulsification process as a function of nanoparticle concentration and elucidate the governing interactions between NH2-MNPs and emulsion droplets. Another important feature of this magnetic demulsifier is its capability to be recovered by solvent-washing and reused for subsequent demulsification cycles. The recovered magnetic demulsifier was proven to be effective in demulsifying O/W emulsion for at least 6 cycles, revealing its recyclability. Demulsification of O/W emulsions with NH2-MNPs has great potential as an efficient strategy for oil removal from produced water.

Graphical abstract: Recyclable amine-functionalized magnetic nanoparticles for efficient demulsification of crude oil-in-water emulsions

Supplementary files

Article information

Article type
Paper
Submitted
27 Mac 2018
Accepted
22 Jul 2018
First published
15 Ago 2018

Environ. Sci.: Water Res. Technol., 2018,4, 1553-1563

Recyclable amine-functionalized magnetic nanoparticles for efficient demulsification of crude oil-in-water emulsions

Q. Wang, M. C. Puerto, S. Warudkar, J. Buehler and S. L. Biswal, Environ. Sci.: Water Res. Technol., 2018, 4, 1553 DOI: 10.1039/C8EW00188J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements