報告書番号

M13004

タイトル（和文）

XAFS法による微量な水銀の化学形態分析法

タイトル（英文）

XAFS characterization study of trace amount of mercury compounds

概要 （図表や脚注は「報告書全文」に掲載しております）

近年、化学物質による環境への影響を未然に防止するため、排出規制や管理の強化が図られており、化石燃料の燃焼に伴い排出される極めて微量な水銀にも、社会の関心が高まりつつある。石炭灰や汚泥に含まれる微量な水銀の化学形態は、揮発性や溶解性などの特性に影響するが、これを直接同定する技術が現状ではない。
放射光によるXAFS分析を水銀に適用することで、石炭由来の燃焼灰や汚泥等に含まれる微量な水銀の化学形態の分析法を開発した。

概要 （英文）

Recently, in order to prevent the environmental impact of chemical substances, emission controls and regulations has been strengthened, and mercury compounds are likely to be the only trace element for which emission controls will be required during the combustion of fossil fuels. There is no way to directly identify chemical form of mercury for trace amount of mercury compounds which contained in the combustion ash. XAFS analysis can be expected as one of the best analytical techniques that it is possible to identify the chemical form of mercury. However, there are few reports on the XAFS analysis of mercury, the development of XAFS analysis is an urgent need for trace amount of mercury.
SPring-8 is the world's largest synchrotron radiation facility and its ultra-brilliant X-ray source is applicable to the analysis of various fields of materials. X-ray absorption fine structure (XAFS) was applied to determine the chemical form of trace mercury contaminations in the complex mixtures such as coal and coal ash by using the multi-channels solid state X-ray detector (multi-channels SSD), and to develop the quick identification technique from XAFS spectrum around Hg-L X-ray absorption edge.

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