Comparison of sequential and single extraction in order to estimate environmental impact of metals from fly ash
| Autor: | Ivana D. Sredović-Ignjatović, Ljubiša M. Ignjatović, Aleksandra M. Tasić, Marija A. Ilić, Mališa Antić |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
021110 strategic defence & security studies Chemistry Sonication 0211 other engineering and technologies 02 engineering and technology General Chemistry ultrawaves coal fly ash microwaves lcsh:Chemistry 03 medical and health sciences 030104 developmental biology lcsh:QD1-999 Environmental chemistry Fly ash sequential extraction single-agent extraction Leaching (metallurgy) Optical emission spectrometry Nuclear chemistry |
| Zdroj: | Journal of the Serbian Chemical Society, Vol 81, Iss 9, Pp 1081-1096 (2016) JOURNAL OF THE SERBIAN CHEMICAL SOCIETY |
| ISSN: | 1820-7421 0352-5139 |
| DOI: | 10.2298/jsc160307038t |
| Popis: | The aim of this paper was to simulate leaching of metals from fly ash in different environmental conditions using ultrasound and microwave-assisted extraction techniques. Single-agent extraction and sequential extraction procedures were used to determine the levels of different metals leaching. The concentration of metals (Al, Fe, Mn, Cd, Co, Cr, Ni, Pb, Cu, As, Be) in fly ash extracts were measured by Inductively Coupled Plasma-Atomic Emission Spectrometry. Single-agent extractions of metals were conducted during sonication times of 10, 20, 30, 40 and 50 min. Single-agent extraction with deionized water was also undertaken by exposing samples to microwave radiation at the temperature of 50°C. The sequential extraction was undertaken according to the BCR procedure which was modified and applied to study the partitioning of metals in coal fly ash. The microwave-assisted sequential extraction was performed at different extraction temperatures: 50, 100 and 150°C. The partitioning of metals between the individual fractions was investigated and discussed. The efficiency of the extraction process for each step was examined. In addition, the results of the microwave-assisted sequential extraction are compared to the results obtained by standard ASTM method. The mobility of most elements contained in fly ash is markedly pH sensitive. [Projekat Ministarstva nauke Republike Srbije, br. 172030, br. 176006 i br. III43009] |
| Databáze: | OpenAIRE |
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