A1 Journal article (refereed), original research

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


Open Access hybrid publication

Publication Details
Authors: Doshi Bhairavi, Hietala Sami, Sirviö Juho, Repo Eveliina, Sillanpää Mika
Publisher: Elsevier
Publication year: 2019
Language: English
Related Journal or Series Information: Journal of Molecular Liquids
Volume number: 291
ISSN: 0167-7322
eISSN: 1873-3166
JUFO-Level of this publication: 1
Open Access: Open Access hybrid publication

Abstract

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.


Last updated on 2020-20-03 at 10:03