open access

https://hdl.handle.net/2115/49012

Chemical profile for Akashibo material

日本語

Ozegahara mire and Ozenuma Lake

2012-03-31

Institute of Low Temperature Science, Hokkaido University

Low Temperature Science

70

49-54

The snow core and interstitial water including Akashibo material were taken at Ozegahara mire and Ozenuma Lake,Gunma prefecture,during Akashibo generating season from 1999 to 2008,and analyzed for some metal elements with ICP-AE and atomic absorption spectrophotometer. The core metal element which composed Akashibo material was iron and accounted for more than 95% among the metal elements, although a variety of metal elements from earth’s crust were measured in Akashibo material. The results indicated that the red color of Akashibo material was formed by oxidized iron. Ferrous iron coexisted always in Akashibo material despite Akashibo material being in the oxic condition. The ratio of ferrous iron to total iron largely varied due to the conditions setting up Akashibo material. A part of ferrous iron which stably existed even if in oxic condition was suggested for being existence as organic complex. The fact that the iron was almost only metal making up Akashibo material might indicate that core of the Akashibo material was covered by specific organic compounds being siderophile. Akashibo material might be red color as resulting oxidation of ferrous iron connecting to the siderophile organic compounds in oxic condition.

紀要論文

Version of Record

1880-7593