The enhanced stability and biodegradation of dispersed crude oil droplets by Xanthan Gum as an additive of chemical dispersant

TitleThe enhanced stability and biodegradation of dispersed crude oil droplets by Xanthan Gum as an additive of chemical dispersant
Publication TypeJournal Article
Year of Publication2017
AuthorsWang A.Q, Li YM, Yang X.L, Bao MT, Cheng H.
JournalMarine Pollution Bulletin
Volume118
Pagination275-280
Date PublishedMay
ISBN Number0025-326X
Accession NumberWOS:000402217300045
KeywordsOil and Gas Degradation
AbstractIt is necessary for chemical dispersant to disperse oil effectively and maintain the stability of oil droplets. In this work, Xanthan Gum (XG) was used as an environmentally friendly additive in oil dispersant formulation to enhance the stability and biodegradation of dispersed crude oil droplets. When XG was used together with chemical dispersant 9500A, the dispersion effectiveness of crude oil in artificial sea water (ASW) and the oil droplet stability were both greatly enhanced. In the presence of XG, lower concentration of 9500A was needed to achieve the effective dispersion and stabilization. In addition to the enhancement of dispersion and stabilization, it was found that the biodegradation rate of crude oil by bacteria was dramatically enhanced when a mixture of 9500A and XG was used as a dispersant. Because of the low environmental impact of XG, this would be a potential way to formulate the dispersant with lower toxicity. (C) 2017 Elsevier Ltd. All rights reserved.
DOI10.1016/j.marpolbul.2017.03.001