ENVIRONMENTAL ENGINEERING RESEARCH
Online ISSN : 1884-829X
Print ISSN : 1341-5115
ISSN-L : 1341-5115
Measures to Prevent Emissions of Hazardous Materials from Crematoriums in Japan
Nobuo TAKEDAMasaki TAKAOKAKazuyuki OSHITA
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JOURNAL FREE ACCESS

2008 Volume 45 Pages 259-270

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Abstract

This study measured hazardous materials, including dioxins, mercury, and hexavalent chromium compounds, in the flue gases, fly ash, and bottom ash from four crematoriums in Japan, to evaluate the emissions from crematoriums.
The toxic equivalent concentration (normalized by 12% O2) of dioxins in the flue gases from crematoriums ranged from 0.00012 to 1.2ng-TEQ/m3N. The estimated maximum emission inventory of dioxins from crematoriums was 1.1 g-TEQ/year, which is less than one-filih ofthe present emission inventoiy. Although mercury in flue gases from crematoriums was under the minimum limit of determination using the JIS K0222 method, Hg0 from dental amalgam contributed significantly to the total mercury emissions from crematoriums based on a continuous mercury speciation analyzer, as in our past study. The hexavalent chromium compounds leached from all ash samples exceeded the Japanese environmental quality standards for soil by 180 to 1, 200 times. Therefore, countermeasures against hexavalent chromium compounds in the ash from crematoriums are required.

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© by Japan Society of Civil Engineers
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