2013 Fiscal Year Final Research Report
Deveropment of analysis method to detect polution record of heavy metal in coral at polution site
| Project/Area Number |
24651009
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Hiroshima University |
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Principal Investigator |
OKUDA TETSUJI 広島大学, 環境安全センター, 助教 (60343290)
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| Co-Investigator(Kenkyū-buntansha) |
HAYAKAWA Shinjirou 広島大学, 工学研究科, 准教授 (80222222)
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| Co-Investigator(Renkei-kenkyūsha) |
NISHIJIMA Wataru 広島大学, 環境安全センター, 教授 (20243602)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 珊瑚 / 鉛 / 重金属 / 汚染 / 散乱Ｘ線 / 蛍光X線 / 定量分析 / 環境計測 |
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| Research Abstract |
In Dominican Republic, we could find and sample some corals survived from 2000 year in the mouth of river in which watershed areas had extensive lead pollution at around 2000. In addition, we analyzed lead concentration for two corals in captivity by the conventional methods, after one year cultivation with lead polluted artificial seawater of one week. It was found that three conventional methods has enough higher resolution (10 micro meter) but doesn't have sensibility to detect lead accumulated in environ.
Improvements in micro x-ray fluorescence analyzer were carried out to detect Ba L lines in coral under atmospheric condition. A special collimator was placed between a sample and the detector, and the interior of the collimator could be evacuated. The sensitivity for Mg and Ka line was gained more than 1000, and the present instrument can be applied to perform quantitative analysis of Fe in the light matrix down to several ppm levels.
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[Journal Article] Chlorophyll and suspended sediment mapping to the Caribbean Sea from rivers in the capital city of the Dominican Republic using ALOS AVNIR-2 data, Environmental Monitoring and Assessment2014
Author(s)
Sakuno Y., Miño, E. R. A., Nakai, S., Mutsuda, M., Okuda, T., Nishijima, W., Castro, R., Garcia, A., Peña, R., Rodriguez, M., and Depratt, G. C.
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Journal Title
Published online
Volume: (in press)
DOI
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[Presentation] Impact of steel slag on benthic community under semi-artificial environment2013
Author(s)
Akiyama Y, Yano H, Katayama T, Koba K, Nagao M, Okuda T, Nakai S, Tanimoto T, Yamamoto T, Nishijima W
Organizer
ISWA World Congress Vienna 2013. No 3
Place of Presentation
Vienna, Austria
Year and Date
20131007-11
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[Presentation] SIMULATION OF CHLOROPHYLL-A ESTIMATION BY WORLDVIEW-2 IN THE URBAN RIVERS OF THE DOMINICAN REPUBLIC USING FIELD SPECTRAL DATA2012
Author(s)
Yuji SAKUNO, Esteban R. MIÑO A., Satoshi NAKAI, Hidemi MUTSUDA, Tetsushi OKUDA, Wataru NISHIJIMA, Rolando CASTRO, Amarillis GARCÍA, Rosanna PEÑA, Marcos RODRIGUEZ, Conrado DEPRATT, G
Organizer
The 33rd Asian Conference On Remote Sensing
Place of Presentation
Pattaya, Thailand
Year and Date
20120000
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