研究目的
To visually analyse the relationship between particles and oil in seawater by digital holograph technology, specifically to determine if particles can safely and harmoniously recover the marine environment after an oil spill by forming oil-particle aggregates (OPAs).
研究成果
The DIH system successfully visualized oil droplets, particles, and OPAs, showing that mineral particles can transport oil to the water bottom by forming OPAs without adding toxic materials. ZrO2 and SiO2 formed different types of OPAs, with particle size inversely affecting oil adsorption rates. Resuspension of OPAs can reduce harm to marine life, and the DIH system is an effective tool for microscale marine studies.
研究不足
The study did not discuss factors like temperature, wind, and salinity that could affect OPA formation due to space limitations. The ability of the DIH system in turbid environments remains unclear.
1：Experimental Design and Method Selection:
A digital inline holographic (DIH) system was designed and used for 3D visualization of oil droplets and OPAs without disturbance. The system employed a laser beam of 660 nm and a monochrome CCD for real-time in situ observation.
2：Sample Selection and Data Sources:
Artificial seawater, light oil (MOBIL SPECIAL 2T), and particles (ZrO2 and SiO2 of various sizes) were used. Experiments were conducted in a water tank (100 × 100 × 150 mm3) and a quartz cuvette (50 × 50 × 50 mm3).
3：List of Experimental Equipment and Materials:
DIH system components including laser, filter, CCD, spatial filter, pinhole, lenses, water tank, cuvette, oil, particles, and a magnet rotor for stirring.
4：Experimental Procedures and Operational Workflow:
Oil was injected to form droplets; particles were spread on oil film to form OPAs; holograms were recorded; resuspension experiments involved stirring OPAs at different oil-to-particle ratios.
5：Data Analysis Methods:
Holograms were reconstructed using MATLAB for 3D to 2D transformation; statistical analysis was performed using Excel for size distribution and adsorption rates.
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