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Yeasts and bacterial biosurfactants as demulsifiers for petroleum derivative in seawater emulsions

Overview of attention for article published in AMB Express, November 2017
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About this Attention Score

  • Good Attention Score compared to outputs of the same age (68th percentile)
  • High Attention Score compared to outputs of the same age and source (81st percentile)

Mentioned by

3 tweeters
1 patent


23 Dimensions

Readers on

57 Mendeley
Yeasts and bacterial biosurfactants as demulsifiers for petroleum derivative in seawater emulsions
Published in
AMB Express, November 2017
DOI 10.1186/s13568-017-0499-6
Pubmed ID

Fernanda Cristina P. Rocha e Silva, Bruno Augusto C. Roque, Nathalia Maria P. Rocha e Silva, Raquel D. Rufino, Juliana M. Luna, Valdemir A. Santos, Ibrahim M. Banat, Leonie A. Sarubbo


Oil sludge or waste generated in transport, storage or refining forms highly stable mixtures due to the presence and additives with surfactant properties and water forming complex emulsions. Thus, demulsification is necessary to separate this residual oil from the aqueous phase for oil processing and water treatment/disposal. Most used chemical demulsifiers, although effective, are environmental contaminants and do not meet the desired levels of biodegradation. We investigated the application of microbial biosurfactants as potential natural demulsifiers of petroleum derivatives in water emulsions. Biosurfactants crude extracts, produced by yeasts (Candida guilliermondii, Candida lipolytica and Candida sphaerica) and bacteria (Pseudomonas aeruginosa, Pseudomonas cepacia and Bacillus sp.) grown in industrial residues, were tested for demulsification capacity in their crude and pure forms. The best results obtained were for bacterial biosurfactants, which were able to recover about 65% of the seawater emulsified with motor oil compared to 35-40% only for yeasts products. Biosurfactants were also tested with oil-in-water (O/W) and water-in-oil (W/O) kerosene model emulsions. No relationship between interfacial tension, cell hydrophobicity and demulsification ratios was observed with all the biosurfactants tested. Microscopic illustrations of the emulsions in the presence of the biosurfactants showed the aspects of the emulsion and demulsification process. The results obtained demonstrate the potential of these agents as demulsifiers in marine environments.

Twitter Demographics

The data shown below were collected from the profiles of 3 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 57 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 57 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 11 19%
Student > Master 9 16%
Student > Bachelor 9 16%
Researcher 6 11%
Other 5 9%
Other 7 12%
Unknown 10 18%
Readers by discipline Count As %
Chemical Engineering 9 16%
Agricultural and Biological Sciences 8 14%
Biochemistry, Genetics and Molecular Biology 5 9%
Engineering 5 9%
Environmental Science 4 7%
Other 11 19%
Unknown 15 26%

Attention Score in Context

This research output has an Altmetric Attention Score of 4. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 20 December 2018.
All research outputs
of 14,876,982 outputs
Outputs from AMB Express
of 933 outputs
Outputs of similar age
of 397,722 outputs
Outputs of similar age from AMB Express
of 106 outputs
Altmetric has tracked 14,876,982 research outputs across all sources so far. This one has received more attention than most of these and is in the 71st percentile.
So far Altmetric has tracked 933 research outputs from this source. They receive a mean Attention Score of 2.2. This one has done particularly well, scoring higher than 90% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 397,722 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 68% of its contemporaries.
We're also able to compare this research output to 106 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 81% of its contemporaries.