Study on industrial wastewater treatment using superconducting magnetic separation
2011
Zhang, Hao | Zhao, Zhengquan | Xu, Xiangdong | Li, Laifeng
The mechanism of industrial wastewater treatment using superconducting magnetic separation is investigated. Fe₃O₄ nanoparticles were prepared by liquid precipitation and characterized by X-ray diffraction (XRD). Polyacrylic acid (PAA) film was coated on the magnetic particles using plasma coating technique. Transmission electron microscope (TEM) observation and infrared spectrum measurement indicate that the particle surface is well coated with PAA, and the film thickness is around 1nm. Practical paper factory wastewater treatment using the modified magnetic seeds in a superconducting magnet (SCM) was carried out. The results show that the maximum removal rate of chemical oxygen demand (COD) by SCM method can reach 76%.
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