NDLI: Investigation on chemical species of arsenic, selenium and antimony in fly ash from coal fuel thermal power stations

Content Provider	Royal Society of Chemistry (RSC)
Author	Narukawa, Tomohiro Chiba, Koichi Takatsu, Akiko Riley, Kenneth W. French, David H.
Copyright Year	2005
Abstract	Investigations of the existing chemical forms and the concentrations of arsenic (As), selenium (Se) and antimony (Sb) in samples of fly ash obtained from six coal-fired power stations in various countries were carried out. The concentration of As was found to vary from 5.4 to 22.3 mg kg−1, and the most common mode of occurrence of As in the fly ashes is in association with carbonates or Fe–Mn oxides. The concentrations of Se and Sb ranged from 2.3–5.2 and 1.0–3.9 mg kg−1, respectively. The dominant chemical forms of Se and Sb in the fly ashes were as extractable species. Also, water-soluble As, Se and Sb in the fly ashes were extracted, and the chemical species of As, Se and Sb in the extract determined using HPLC-ICP-MS. This was done as the potential release of soluble As, Se and Sb through leaching of fly ash is of environmental concern. The most abundant form of As in the extract was the low toxicity As(V). The main species of Se was Se(IV), although it was found that the ratio of Se(VI) to Se(IV) in acidic fly ashes is higher than in alkaline fly ash samples. Antimony was mostly present as Sb(III).
Starting Page	1342
Ending Page	1348
Page Count	7
File Format	HTM / HTML PDF
ISSN	14640325
Volume Number	7
Issue Number	12
Journal	Journal of Environmental Monitoring
DOI	10.1039/b509817c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Arsenic Selenium Antimony Fly ash
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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