A Low Temperature Detoxification Method for Treatment of Chrysotile-Containing Waste Roofing Slate
| Autor: | Jung Hyun Jo, Young Nam Jang, Hwanju Jo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Liquid ratio
Mg oxalate lcsh:QE351-399.2 Oxalic acid 0211 other engineering and technologies Detoxification method 02 engineering and technology 010501 environmental sciences Raw material 01 natural sciences Intermediate product oxalic acid chemistry.chemical_compound Mining engineering Chrysotile detoxification asbestos 0105 earth and related environmental sciences Cement 021110 strategic defence & security studies lcsh:Mineralogy Geology Geotechnical Engineering and Engineering Geology chemistry Hydrate Nuclear chemistry |
| Zdroj: | Minerals; Volume 7; Issue 8; Pages: 144 Minerals, Vol 7, Iss 8, p 144 (2017) |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min7080144 |
| Popis: | In this study, we evaluated a two-step process for detoxification of waste roofing slate, involving cement hydrate removal and low temperature detoxification using oxalic acid. These treatments were conducted on raw material and intermediate product, respectively. Cement hydrate removal effectively eliminated most Ca-containing cement hydrate components from the raw material under the following conditions: HCl to solid ratio: 0.456 g/g, reaction time: 2 h, and solid to liquid ratio: 0.124 g/mL. Following low temperature (~100 °C) detoxification of intermediate product obtained after cement hydrate removal, chrysotile in waste roofing slate was effectively transformed to Mg-oxalate under conditions of oxalic acid to solid ratio of >0.67 g/g. |
| Databáze: | OpenAIRE |
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