期刊
SEPARATION SCIENCE AND TECHNOLOGY
卷 55, 期 15, 页码 2822-2829出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2019.1646762
关键词
Wastewater treatment; nanoparticles; adsorption; separation technology; magnetic separation; magnetite; superparamagnetic
资金
- Montana Research and Economic Development Initiative of the Montana University System [51050-MUSRI2015-01]
- National Science Foundation EPSCoR [OIA-1757351]
Within the field of wastewater treatment, nano-adsorbents are a significant emerging technology; however, separation of the nano-scale particles after loading has proved to be an impediment to widespread industrial implementation. Magnetic collection of nanoparticles is a potential strategy for effective separation. Nano-scale magnetite is an effective adsorbent, is sufficiently magnetically susceptible, and is superparamagnetic, allowing re-dispersion following magnetic collection. In this work, an in-line, water-cooled magnetic collection module was developed with collection efficiencies regularly exceeding 98%. Models were developed over various flow regimes. The role of cooperative magnetophoresis was demonstrated and a physical model has been proposed for adsorption upon particle agglomerations about magnetic core wires.
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