Coastal Ecosystem Science Division, Science Branch, Fisheries and Oceans Canada, P.O. Box 1006, 1 Challenger Drive, Dartmouth, NS B2Y 4A2, Canada.
Coastal Ecosystem Science Division, Science Branch, Fisheries and Oceans Canada, P.O. Box 1006, 1 Challenger Drive, Dartmouth, NS B2Y 4A2, Canada.
Mar Pollut Bull. 2017 Nov 15;124(1):292-302. doi: 10.1016/j.marpolbul.2017.07.042. Epub 2017 Jul 24.
The size and settling velocity of oil-mineral aggregates (OMAs) derived from diluted bitumen are primary constituents in predictive models for evaluating the potential fate of oil spilled in the aquatic environment. A series of low sediment concentration (15mg·L), colder water (<10°C) wave tank experiments designed to measure variability in these parameters in naturally-formed OMAs in response the presence or absence of chemical dispersant are discussed. Corresponding lab experiments revealed settling velocities of artificially formed OMAs on the order of 0.1-0.4mm·s. High-resolution imagery of settling particles were analyzed for particle size, density and settling velocity. In situ formation of OMAs in the wave tank was unsuccessful. Possible effects of chemical dispersant on natural sediment flocculation, the size of suspended oil droplets and clearance rates of suspended particles are discussed.
油矿物聚集体（OMAs）的大小和沉降速度是预测模型中评估在水环境污染中溢油潜在命运的主要组成部分。本文讨论了一系列低泥沙浓度（15mg·L）、较冷的水（<10°C）波水槽实验，旨在测量在自然形成的 OMAs 中，由于存在或不存在化学分散剂，这些参数的可变性。相应的实验室实验揭示了人工形成的 OMAs 的沉降速度约为 0.1-0.4mm·s。对沉降颗粒的高分辨率图像进行了分析，以确定颗粒大小、密度和沉降速度。在波槽中成功原位形成了 OMAs。还讨论了化学分散剂对天然泥沙絮凝、悬浮油滴大小和悬浮颗粒清除率的可能影响。
