磁性氧化石墨处理乳化含油废水及磁致增强效应

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Abstract Magnetic graphite oxide, a new type of material, was prepared by using potassium ferrate as an oxidant based on modified Hummers method. Based on SEM, FTIR, N₂ adsorption-desorption and surface contact angle measurements, the decontamination and magneto-induced enhanced effect of magnetic graphite oxide on the treatment of emulsified oily wastewater were investigated. The results showed that compared with graphite, specific surface areas of magnetic graphite oxide increased and the surface exhibited curly structure loaded with Fe₃O₄ particles, with oxygen-containing functional groups and strong hydrophobic micro-pore structures. In external magnetic field, magnetic graphite oxide agglomerated to form hydrophobic macroscopic pore structures, which were beneficial to adsorption and adhesion of emulsified oil droplets. As expected, magnetic graphite oxide was found to be much more effective to treat emulsified oily wastewater than graphite and powdered activated carbon. The efficiency of emulsified oily wastewater treatment was positive relevance to the magnetic field strength and removal of COD could exceed 95%. The used magnetic graphite oxide could be recycled by solvent extraction or heat treatment. The regeneration efficiencies were 92% and 86% for thermal treatment and solvent extraction for 4cycles. Therefore, the research above supports an effective method for the treatment of emulsified oily wastewater.

Key words： emulsified oil graphite oxide oil-water separation magnetic material regeneration efficiency

Received: 20 December 2019

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X703

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	HU Zhuo-qi
	CHEN Quan-yuan

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HU Zhuo-qi,CHEN Quan-yuan. Treatment of emulsified oily wastewater by magnetic graphite oxide and magneto-induced enhanced effect[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(7): 2970-2977.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I7/2970

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