Abstract
The effectiveness of chemical dispersants (Corexit 9500 and SPC 1000) on heavy fuel oil (IFO180 as test oil) has been evaluated under different wave conditions in a flow-through wave tank. The dispersant effectiveness was determined by measuring oil concentrations and droplet size distributions. An analysis of covariance (ANCOVA) model indicated that wave type and temperature significantly (p<0.05) affected the dynamic dispersant effectiveness (DDE). At higher temperatures (16°C), the test IFO180 was effectively dispersed under breaking waves with a DDE of 90% and 50% for Corexit 9500 and SPC 1000, respectively. The dispersion was ineffective under breaking waves at lower temperature (10°C), and under regular wave conditions at all temperatures (10-17°C), with DDE<15%. Effective chemical dispersion was associated with formation of smaller droplets (with volumetric mean diameters or VMD ≤ 200 μm), whereas ineffective dispersion produced large oil droplets (with VMD ≥ 400 μm).
Original language | English (US) |
---|---|
Pages (from-to) | 1550-1559 |
Number of pages | 10 |
Journal | Marine Pollution Bulletin |
Volume | 60 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2010 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Oceanography
- Aquatic Science
- Pollution
Keywords
- Chemical dispersion
- Droplet size distribution
- Dynamic dispersant effectiveness
- Heavy fuel oil
- Temperature effect
- Wave effect