2005 Fiscal Year Final Research Report Summary
Field survey and health risk evaluation of antimony around a point source and waste water purification
| Project/Area Number |
15560475
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Civil and environmental engineering
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| Research Institution | DAIDO INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
HORIUCHI Masato Daido Institute of Technology, Dept.of Eng., Professor, 工学部, 教授 (00157059)
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| Project Period (FY) |
2003 – 2005
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| Keywords | antimony / point source / field survey / Physiologically based extraction test / health risk evaluation / waste water treatment / adsorption / manganese-bismuth oxide |
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| Research Abstract |
Field survey and health risk evaluation were carried out around a industrial plant from which antimony was released into atmosphere and river. Toward a development of antimony purification from waste water, adsorption test were carried out using artificial zeolite, manganese-bismuth oxide or iron-bismuth oxide. The results can be summarized as follows :
(1)Antimony concentrations in surface soil, obtained by 1NHCl extraction test, exceeded 11 times of maximum natural abundance.
(2)Physiologically based extraction tests were carried out to examine the antimony concentration in the stomach and small intestine eluted from soil.
(3)It was estimated that daily antimony intake from soil is about 1/20 of TDI for the adult. However, it corresponds to about 1/2 of TDI for the infant.
(4)Antimony purification from solution by adsorption was the most effective when manganese oxide : bismuth oxide was 1:1 or 1:0.8 as adsorbent. 400℃-500℃ was the most effective temperature for calcination. Extraction ratio of antimony were more than 99.9% at the previously described conditions.
(5)Iron-bismuth oxide was the most effective adsorbent for antimony among all adsorbents which were investigated in this study.
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