| Dissolution behavior of selenium from coal fly ash particles for the development of an acid-washing process. | |
| | |
MedLine Citation:
|
PMID: 21784503 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Coal fly ash emitted from coal-fired electric power stations generally contains environmentally regulated trace elements. In particular, boron, arsenic, and selenium have been recognized as troublesome trace elements because elutions from the fly ash contain them. In order to design an effective removal process for these trace elements, we have developed and investigated an acid-washing process. The dissolution behavior of selenium from coal fly ash particles was focused on for the improvement of the process, and was found to greatly depend on the pH of the acid solutions. The species of selenium in solutions with a pH of around 0-1 was determined to be H(2)SeO(3). The dissolved H(2)SeO(3) transformed into HSeO(3)(-) and adsorbed onto the surface of the ash particles in solution upon elevation of the pH. The re-elution of the absorbed HSeO(3)(-) as SeO(3)(2-) at a pH of 10 was also confirmed, and will cause the elution of the excess selenium from the acid-washed ash. |
| | |
Authors:
|
Shunsuke Kashiwakura; Hajime Ohno; Yuichi Kumagai; Hiroshi Kubo; Kazuyo Matsubae; Tetsuya Nagasaka |
Related Documents
:
|
9879923 - A commensal symbiosis between prevotella bivia and peptostreptococcus anaerobius involv... 17467253 - Sequential utilization of substrates by pseudomonas putida csv86: signatures of interme... 14281723 - Control of enzyme activity in growing bacterial cells by concerted feedback inhibition. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-7-22 |
Journal Detail:
|
Title: Chemosphere Volume: - ISSN: 1879-1298 ISO Abbreviation: - Publication Date: 2011 Jul |
Date Detail:
|
Created Date: 2011-7-25 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0320657 Medline TA: Chemosphere Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
|
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Advanced oxidation of alkylphenol ethoxylates in aqueous systems.
Next Document: Dental microwear texture analysis of hominins recovered by the Olduvai Landscape Paleoanthropology P...