Journal of Environmental Treatment Techniques  
2021, Volume 9, Issue 1, Pages: 259-263  
J. Environ. Treat. Tech.  
ISSN: 2309-1185  
Journal web link: http://www.jett.dormaj.com  
https://doi.org/10.47277/JETT/9(1)263  
Long-Term Combined Effects of Crude Oil and  
Dispersant on Sediment Bacterial Community  
Mohammed Al-Jawasim*  
Department of Environmental Science/ University of Al-Qadisiyah, Al-Dewaniya, 58014, Iraq  
Received: 16/08/2020  
Accepted: 13/11/2020  
Published: 20/03/2021  
Abstract  
To better understand long-term combined effects of crude oil and dispersant on bacterial community, sediments microcosms were  
set up in triplicates and treated with dispersant (Corexit 9500A), crude oil, and Corexit 9500A plus crude oil. After 60 days exposure,  
there was a significant change in the bacterial community structure in all treatments. The shift in the bacterial community structure in  
Corexit 9500A plus crude oil treatment was considerably different from those by either Corexit 9500A or crude oil. DNA sequence  
analysis showed that Hydrocarboniphaga effuse, Parvibaculum lavamentivorans,and Alicyclobacil