Effectiveness of N,O-carboxymethyl chitosan on destabilization of Marine Diesel, Diesel and Marine-2T oil for oil spill treatment
Doshi, Bhairavi; Repo, Eveliina; Heiskanen, Juha P.; Sirviö, Juho Antti; Sillanpää, Mika (2017-03-21)
Bhairavi Doshi, Eveliina Repo, Juha P. Heiskanen, Juho Antti Sirviö, Mika Sillanpää, Effectiveness of N,O-carboxymethyl chitosan on destabilization of Marine Diesel, Diesel and Marine-2T oil for oil spill treatment, Carbohydrate Polymers, Volume 167, 1 July 2017, Pages 326-336, ISSN 0144-8617, http://dx.doi.org/10.1016/j.carbpol.2017.03.064. (http://www.sciencedirect.com/science/article/pii/S014486171730320X)
© 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-NDlicense (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Oil spills are the significant sources of hydrocarbons entering in the receiving aquatic environment. An efficient method to remove hydrocarbons from water resources is adsorption. In this study, water soluble N,O-carboxymethyl chitosan (NO-CS) was synthesized by carboxymethylation of chitosan in a hydro-alcoholic medium at 50 °C by chloroacetic acid. The polymer was characterized through degree of deacetylation, degree of substitution, FTIR and 1H NMR. Effectiveness of NO-CS as an adsorbent was studied as a function of dosage, salinity and pH to destabilize the Marine diesel (Oil-1), Diesel (Oil-2) and Marine-2T oil (Oil-3) into small oil droplets of less than 100 μm. Optical microscope was used for studying the size of oil droplets and adsorption effect of the oils on this polymer. The destabilization of marine diesel was the most effective among the studied three oils, which showed excellent adsorption at sea water alkalinity and salinity.
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