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A binary mixture of a biosurfactant and an ionic liquid surfactant as a green dispersant for oil spill remediation

Shah, M.U.H. and Moniruzzaman, M. and Sivapragasam, M. and Talukder, M.M.R. and Yusup, S.B. and Goto, M. (2019) A binary mixture of a biosurfactant and an ionic liquid surfactant as a green dispersant for oil spill remediation. Journal of Molecular Liquids, 280 . pp. 111-119.

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Official URL: https://www.scopus.com/inward/record.uri?eid=2-s2....

Abstract

Formulations based on conventional surfactants and organic solvents have been used as potential dispersants for oil-spill remediation. However, their toxicity restricts their usage in marine environments. As a low-toxicity alternative, in this article we report an oil dispersant based on a binary mixture of an ionic liquid surfactant, choline laurate (ChoLau), and a biosurfactant, lactonic sophorolipid. We investigated the micellar properties, including the critical micelle concentration, micellar interaction parameter (β), and activity coefficients (f 1 and f 2 ) for the mixed surfactant system. A non-ideal and synergistic interaction between ChoLau and lactonic sophorolipid was observed. A stable oil-in-water emulsion formed at an optimal ratio of 40:60 (w/w) of ChoLau and lactonic sophorolipid. At this ratio, a dispersion effectiveness of 83% was achieved with a dispersant-to-oil ratio of 1:25 (v/v). We observed the dispersed oil droplets with an optical microscope and evaluated their size using dynamic light scattering. The droplet size decreased with increasing dispersant-to-oil ratio. We also assessed the toxicity of the binary surfactant mixture in zebra fish (Danio rerio). Based on this assessment, the mixture can be classified as non-toxic. Therefore, the mixture of ChoLau and lactonic sophorolipid is a potential alternative to conventional toxic oil-spill dispersants. © 2019 Elsevier B.V.

Item Type:Article
Impact Factor:cited By 0
Uncontrolled Keywords:Binary mixtures; Biomolecules; Critical micelle concentration; Drops; Emulsification; Emulsions; Ionic liquids; Light scattering; Micelles; Surface active agents; Toxicity, Binary surfactant mixture; Conventional surfactants; Ionic liquid surfactants; Laurate; Mixed surfactant systems; Oil-in-water emulsions; Sophorolipids; Synergistic interaction, Oil spills
Departments / MOR / COE:Research Institutes > Institute for Sustainable Building
ID Code:22096
Deposited By: Ahmad Suhairi
Deposited On:28 Feb 2019 08:09
Last Modified:29 Jul 2019 03:10

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