Bhairavi Doshi, Sami Hietala, Juho Antti Sirviö, Eveliina Repo, Mika Sillanpää, A powdered orange peel combined carboxymethyl chitosan and its acylated derivative for the emulsification of marine diesel and 2T-oil with different qualities of water, Journal of Molecular Liquids, Volume 291, 2019, 111327, ISSN 0167-7322, https://doi.org/10.1016/j.molliq.2019.111327
A powdered orange peel combined carboxymethyl chitosan and its acylated derivative for the emulsification of marine diesel and 2T-oil with different qualities of water
|Author:||Doshi, Bhairavi1; Hietala, Sami2; Sirviö, Juho3;|
1Department of Green Chemistry, LUT University, Sammonkatu 12, FI-50130 Mikkeli, Finland
2Department of Chemistry, University of Helsinki, P.O. Box 55, FIN-00014, Finland
3Fibre and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014, Finland
4Department of Separation and Purification, School of Engineering Science, LUT University, Yliopistonkatu 34, FI-53850, Finland
|Online Access:||PDF Full Text (PDF, 5.9 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019071823128
|Publish Date:|| 2019-07-18
The traces of hazardous chemicals used in oil spill response have harmed marine creatures with long-term cytotoxic impacts, so, a greener alternative is to use biodegradable components in the dispersant formulation. This study demonstrates the efficiency of carboxymethylated and acylated chitosan combined with powdered orange peel (OP-D) in the emulsification of marine diesel and 2T-oil with different qualities of water. OP-D particles undergo Pickering emulsions, whereas the amphiphilic behaviour of the Blend and hydrophobically modified carboxymethyl chitosan-orange peels (CSOP-A) favours conventional emulsions through steric and electrostatic stabilization. The emulsion formation rate was maximum with OP-D in saline water and autonomous of the water quality with Blend. Additionally, different hydrophobic moieties on the surface of the Blend and CSOP-A affected the oil droplets’ stabilization rate. Changing pH altered the surface properties of particles and hence the nature of the formed emulsion range from gel-like to creamy, suggesting particle-particle to particle-oil interactions. An increase in electrolyte concentration enhanced the coalescence rate of marine diesel with CSOP-A. The oil droplet size in the formed emulsion increases with a temperature decrease up to 2 °C, and the emulsion stabilization rate was <10% at −20 °C. The traces of these synthesized materials were <1000 mg L⁻¹ in the water phase after the removal of oils. Since these materials are bio-based, their presence in the ecosystem is less hazardousness than commercial dispersants.
Journal of molecular liquids
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
215 Chemical engineering
The authors are grateful to the Academy of Finland (decision number 283200) for funding this project.
© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).