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

Mansoor Ul Hassan Shah, Muhammad Moniruzzaman, Magaret Sivapragasam, Md Mahabubur Rahman Talukder, Suzana Bt Yusup, Masahiro Goto

Research output: Contribution to journalArticle

3 Citations (Scopus)

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 ([Cho][Lau]), 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 [Cho][Lau] and lactonic sophorolipid was observed. A stable oil-in-water emulsion formed at an optimal ratio of 40:60 (w/w) of [Cho][Lau] 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 [Cho][Lau] and lactonic sophorolipid is a potential alternative to conventional toxic oil-spill dispersants.

Original languageEnglish
Pages (from-to)111-119
Number of pages9
JournalJournal of Molecular Liquids
Volume280
DOIs
Publication statusPublished - Apr 15 2019

Fingerprint

Ionic Liquids
Oil spills
Binary mixtures
Remediation
Ionic liquids
Surface-Active Agents
binary mixtures
Oils
Surface active agents
oils
surfactants
Toxicity
liquids
toxicity
Laurates
Critical micelle concentration
Poisons
Activity coefficients
Dynamic light scattering
Choline

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

A binary mixture of a biosurfactant and an ionic liquid surfactant as a green dispersant for oil spill remediation. / Shah, Mansoor Ul Hassan; Moniruzzaman, Muhammad; Sivapragasam, Magaret; Talukder, Md Mahabubur Rahman; Yusup, Suzana Bt; Goto, Masahiro.

In: Journal of Molecular Liquids, Vol. 280, 15.04.2019, p. 111-119.

Research output: Contribution to journalArticle

Shah, Mansoor Ul Hassan ; Moniruzzaman, Muhammad ; Sivapragasam, Magaret ; Talukder, Md Mahabubur Rahman ; Yusup, Suzana Bt ; Goto, Masahiro. / A binary mixture of a biosurfactant and an ionic liquid surfactant as a green dispersant for oil spill remediation. In: Journal of Molecular Liquids. 2019 ; Vol. 280. pp. 111-119.
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