Magnetic separation of hematite-coated Fe3O4 particles used as arsenic adsorbents
| Autor: | Ioannis Tsiaoussis, George Stavropoulos, Mavroeidis Angelakeris, Konstantinos Simeonidis, G. Vourlias, Sofia Tresintsi, Manassis Mitrakas, Theofilos Gkinis, Carlos Martinez-Boubeta |
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| Rok vydání: | 2011 |
| Předmět: |
General Chemical Engineering
Magnetic separation Mineralogy Nanoparticle chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Industrial and Manufacturing Engineering chemistry.chemical_compound Adsorption Specific surface area Environmental Chemistry Arsenic 0105 earth and related environmental sciences Magnetite Aqueous solution Chemistry General Chemistry Hematite 021001 nanoscience & nanotechnology 6. Clean water Chemical engineering visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Chemical Engineering Journal. 168:1008-1015 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2011.01.074 |
| Popis: | Ball-milling of magnetite powder is studied as a potential method to produce large quantities of nanostructured particles for As(III) and As(V) adsorption. Surfactant-assisted milling resulted in 30 nm isolated nanoparticles with high specific surface area but limited adsorption capacity. On the opposite, when no surfactant is added, large aggregates (300 nm) surrounded by a thick α-Fe 2 O 3 shell were formed. Hematite-coated particles appear to be very effective in the removal of As(III) and As(V) from aqueous solutions being able to adsorb around 1.0 and 2.1 μg/mg, respectively, while keeping the residual arsenic below the regulation limits for drinking water. In addition, the existence of a magnetic core facilitates their application in a magnetic separation system. |
| Databáze: | OpenAIRE |
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