Preliminary Study on Additives for Controlling As, Se, B, and F Leaching from Coal Fly Ash
| Autor: | Yukio Hayakawa, Shinji Kambara, Erda Rahmilaila Desfitri, Farrah Fadhillah Hanum |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
lcsh:QE351-399.2
chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences coal fly ash chemistry.chemical_compound Coal Leachate Calcium oxide Arsenic 0105 earth and related environmental sciences Cement lcsh:Mineralogy calcium business.industry Geology 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology chemistry Fly ash Environmental chemistry paper sludge ash additives Leaching (metallurgy) 0210 nano-technology business Selenium |
| Zdroj: | Minerals Volume 8 Issue 11 Minerals, Vol 8, Iss 11, p 493 (2018) |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min8110493 |
| Popis: | The application of paper sludge ash as an additive in controlling the leaching of trace elements has been satisfactorily effective to date. Previous studies have found that paper sludge ash has a promising effect in controlling the leaching of arsenic, selenium and boron. The content of calcium oxide in paper sludge ash is believed to be one of the important factors in decreasing the concentration of trace elements in leachate. Therefore, this study aimed to verify the effect of paper sludge ash in the leaching process and to propose an effective and applicable suppressing material that can control the leaching of As, Se, B and F simultaneously. In light of this aim, Ca(OH)2, PS ash 8 and blast furnace cement (BF cement) were tested as single and mixed additives in two different coal fly ashes (FA C and FA H). The results indicate that the application of a mixture of additives is necessary to control the leaching of trace elements. A mixture of PS ash 8, Ca(OH)2 and blast furnace cement (BF cement) was proposed to be an applicable and suitable additive that could suppress arsenic, selenium, boron, and fluorine leaching simultaneously. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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