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A laboratory study on the kinetics of the formation of oil-suspended particulate matter aggregates using the NIST-1941b sediment |
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| Authors: | Juan Sun Ali Khelifa Zhendi Wang Sharon Wong Benjamin Fieldhouse |
| Institution: | a College of Environmental Science and Engineering, Ocean University of China Qingdao, Shandong Province 266100, China b Emergencies Science and Technology Section (ESTS), Science and Technology Branch, Environment Canada, 335 River Rd., Ottawa, Ontario, Canada K1A 0H3 c College of Chemistry and Chemical Engineering, China University of Petroleum Qingdao, Shandong Province 266555, China d Faculty of Engineering, University of Waterloo, Waterloo, Ontario, Canada e Department of Chemistry, Ottawa University, Ottawa, Ontario, Canada |
| Abstract: | The formation of oil-suspended particulate matter aggregates (OSAs) results from the heteroaggregation between dispersed oil droplets and suspended particulate matter present in coastal waters. This process has been recognized by the oil spill remediation community to enhance natural cleansing of oiled shorelines and oil dispersion in the water column. While several studies have been conducted on the formation and characteristics of OSAs, few studies have addressed the kinetics of OSA formation. Operationally, this has left decision-makers lacking information on the time scale of this process and its significance to oil dispersion in real spills. A laboratory study was conducted to investigate the kinetics of OSA formation as a function of mixing energy and the sediment-to-oil ratio using the standard reference material 1941b. Results showed that formation of OSAs increased exponentially with the mixing time and reached a maximum within 4 h. When the shaking rate increased from 2.0 to 2.3 Hz, the maximum oil trapping efficiency increased from 20% to 42% and the required shaking time decreased from 3.7 to 0.7 h. |
| Keywords: | Oil dispersion Oil-mineral aggregate Oil-sediment interaction Oil spill Oil-suspended particulate matter aggregate Oil sedimentation |
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