Heavy oil spills from stranded oil tankers are a global problem. The recovery of spilled oil must have a low environmental impact and must be capable of processing large quantities at high speeds. In this study, we investigated the application of magnetic separation for the recovery of spilled oil. Pickering emulsions were formed by heavy oil and magnetite, and recovery was carried out using a drum‐type permanent magnet. Pickering emulsions were successfully formed by stirring heavy oil A and magnetite, and magnetic separation experiments showed that up to 90% of the heavy oil A could be recovered. To recycle magnetite, a small amount of heavy oil was added to the recovered Pickering emulsions, and then a strong magnetic field of a superconducting bulk magnet was applied, which resulted in easy solid–liquid separation. The possibility of recycling magnetite after separation was also demonstrated. Finally, a small‐scale system using drum‐type permanent magnets was developed, and magnetic separation experiments were performed. The results showed that approximately 77% of the heavy oil A could be recovered. Particle trajectory simulations also demonstrated the recoverability of heavy oil at the sea surface. © 2024 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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磁力Pickering乳化回收溢油的基础研究

搁浅油轮的重油泄漏是一个全球性问题。泄漏石油的回收必须对环境影响较小，并且必须能够高速处理大量石油。在这项研究中，我们研究了磁分离在回收溢油中的应用。重油和磁铁矿形成皮克林乳液，并使用鼓式永磁体进行回收。通过搅拌重油A和磁铁矿，成功形成Pickering乳液，磁分离实验表明，可以回收高达90%的重油A。为了回收磁铁矿，将少量重油添加到回收的皮克林乳液中，然后施加超导块体磁体的强磁场，这使得固液分离变得容易。还证明了分离后回收磁铁矿的可能性。最后，开发了一种使用滚筒式永磁体的小型系统，并进行了磁分离实验。结果表明，大约77%的重油A可以被回收。粒子轨迹模拟还证明了海面重油的可采性。 © 2024 日本电气工程师协会。由 Wiley 期刊有限责任公司出版。