Novel coprecipitation–oxidation method for recovering iron from steel waste pickling liquor
| Autor: | Yu-Peng Guo, Yongkui Yang, Yun Qi, Hong-Yang Yang, She-Jiang Liu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Coprecipitation Metallurgy Nanoparticle 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Magnetization Crystallinity Reduction potential Chemical engineering Remanence Pickling 0210 nano-technology Dispersion (chemistry) 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Frontiers of Environmental Science & Engineering. 11 |
| ISSN: | 2095-221X 2095-2201 |
| Popis: | Waste pickling liquors (WPLs) containing high concentrations of iron and acid are hazardous waste products from the steel pickling processes. A novel combined coprecipitation–oxidation method for iron recovery by Fe3O4 nanoparticle production from the WPLs was developed in this study. An oxidation–reduction potential monitoring method was developed for real-time control of the Fe2+/Fe3+ molar ratio. The key coprecipitation–oxidation parameters were determined using the orthogonal experimental design method. The use of promoters greatly improved the Fe3O4 nanoparticle crystallinity, size, magnetization, and dispersion. X-ray diffraction patterns showed that the produced Fe3O4 nanoparticles were single phase. The Fe3O4 nanoparticles were approximately spherical and slightly agglomerated. Vibrating sample magnetometry showed that the Fe3O4 nanoparticles produced from the WPLs had good magnetic properties, with a saturation magnetization of 80.206 emu·g–1 and a remanence of 10.500 emu·g–1. The results show that this novel coprecipitation–oxidation method has great potential for recycling iron in WPLs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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