Marine Environmental Technology, Trondheim, Norway.
Marine Environmental Technology, Trondheim, Norway.
Mar Pollut Bull. 2019 Jan;138:520-525. doi: 10.1016/j.marpolbul.2018.11.020. Epub 2018 Dec 11.
Limited experimental and field data are available describing oil droplet formation from subsea releases at high pressure. There are also analytical challenges quantifying oil droplets over a wide size and concentrations range at high pressure. This study quantified oil droplets released from an orifice in seawater at low and high pressure (5 m and 1750 m depth). Oil droplet sizes were quantified using a newly developed sensor (Silhouette camera or SilCam). The droplet sizes measured during experiments at low and high pressure, using the same release conditions, showed no significant difference as a function of pressure. This lack of a pressure effect on oil droplet sizes was observed for both untreated oil and for droplet formation during subsea dispersant injection or SSDI. This strongly indicates that the effectiveness of SSDI is not influenced by water depth or pressure, at least for simulated subsea releases of oil alone (no gas).
有限的实验和现场数据可用于描述高压海底排放物中油滴的形成。在高压下，定量分析大范围和浓度范围内的油滴也具有分析上的挑战。本研究在低压和高压（5 米和 1750 米深度）下从海水孔口中定量释放油滴。使用新开发的传感器（Silhouette 相机或 SilCam）定量测量油滴尺寸。在低压和高压下进行的实验中，在相同的释放条件下，测量的液滴尺寸没有表现出明显的压力依赖性。在未处理的油和海底分散剂注入或 SSDI 期间的液滴形成过程中，都观察到这种对油滴尺寸没有压力影响的现象。这强烈表明，SSD 的有效性不受水深或压力的影响，至少对于单独的模拟海底油类排放（无气体）而言是这样。
