Behavior of Environmental Pollutants in Wetlands and Strategy for Environmental Recovery
| Project/Area Number |
18510056
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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 |
Risk sciences of radiation/Chemicals
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| Research Institution | Niigata University |
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Principal Investigator |
KANO Naoki Niigata University, Faculty of Engineering, Associate Professor (00272857)
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| Co-Investigator(Kenkyū-buntansha) |
IMAIZUMI Hiroshi Niigata University, Faculty of Engineering, Professor (80126391)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥4,010,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥510,000)
Fiscal Year 2007: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2006: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | wetland / pollutants / environmental behavior / environmental assesment / natural substances / ecological restoration / bioconcentration / biosorption / 湿地帯 / 微量化学物質 |
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| Research Abstract |
In order to investigate the behavior of the pollutants in wetlands, the concentrations of trace metallic elements (REEs, Th, U), polycyclic aromatic hydrocarbon (PAHs), and oxygen stable isotope ratios (i.e., δ^(18)O) etc. in environmental samples were measured. In this study, laboratory model experiments regarding the uptake or adsorption of pollutants were also carried out. Consequently, the following matters have been mainly clarified.
(1) The concentrations of REEs, Th, U in precipitation increased in spring and the quantity of PAHs deposition and concentration increased at mountains area in winter. In addition, δ^(18) O of precipitations was the smallest in rainy season. The atmospheric concentrations of PAHs generally decreased at urban region in spring, and increased at mountains area in winter.
(2)δ^(18) O of sample waters in Sakata lagoon was larger than that of other environmental waters in Niigata Prefecture, and was especially large in summer. It can be closely related to the biological process such as the activity of Crustacea plankton and to the recharge from surrounding groundwater as well as the effect of evaporation.
(3) The concentration of REEs in seaweed species were about 10^2-10^3 times higher than those in seawater and the enrichment factor of REEs was larger in heavy REE than light REE. The concentration of U was large in brown algae, especially highest in Undaria pinnatifida.
(4) Cr(VI) was reduced to Cr(III) by humic substances; moreover, the reduction ability of humic substances decreased with increasing pH. The complexation of Cr(III) proceeded faster than the reduction of Cr(VI) and reached a maximum at pH 5.
(5) The method of hydrogen isotope exchange reaction used in this work is useful for evaluating influence of T on environment, and the actual analysis of some materials can be possible using both the MOPAC and the A "-McKay plot methods.
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Report
(3 results)
Research Products
(77 results)
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[Journal Article] Environmental characteristics of precipitations based on both oxygen stable isotopic ratio and concentration of rare earth elements(REEs), thorium(Th), uranium(U) in Niigata Prefecture2006
Author(s)
N, Kano, T, Kikuchi, N, Sakamoto, H, Imaizumi, H, Murayama, H, Yagoh, T, Ohizumi
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Journal Title
Radioisotopes 55(6)
Pages: 307-317
NAID
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Journal Article] Study on the Behavior of Pollutants in lagoon waters in Niigata Prefecture, Japan2006
Author(s)
N, Kano, Y.-J, Zheng, H, Lu, M, Tazawa, Y, Yashima, T, Koyama, H, Imaizumi
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Journal Title
Geophysical Solutions for Environment and Engineering(Proc. of the 2nd International Conference on Environmental and Engineering Geophysics) Vol.2
Pages: 802-806
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Environmental characteristics of lagoon waters in Niigata Prefecture based on oxygen stable isotopic ratio and the concentrations of dissolved materials
Author(s)
H, Lu, N, Kano, Y, Yashima, Y, Amano, C, Li, H, Imaizumi, N, Watanabe, Y, Zheng
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Journal Title
NAID
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 降水中トリチウムで見る日本近辺の気団動態2007
Author(s)
高橋優太, 今泉 洋, 狩野直樹, 斎藤正明, 加藤徳雄, 石井吉之, 斎藤圭一
Organizer
日本原子力学会関東・甲越支部第6回若手研究者発表討論会
Place of Presentation
財団法人電力中央研究所(狛江,東京)
Year and Date
2007-10-31
Description
「研究成果報告書概要(和文)」より
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[Presentation] Analysis of Air Mass Movement around Japan by Using Tritium Concentration in Precipitation2007
Author(s)
Y, Takahashi, H, Imaizumi , N, Kano, M, Saito, T, Kato, Y, Ishi, K, Saito
Organizer
6th meeting for young researchers at Kanto-Kouetsu Branch, Atomic Energy Society of Japan
Place of Presentation
Central Research Institute of Electric Power Industry, Komae(Tokyo)
Year and Date
2007-10-31
Description
「研究成果報告書概要(欧文)」より
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[Presentation] The behavior of REEs, Th, U in soil environment2007
Author(s)
TSUCHIDA, Toshiyuki, KANO, Naoki, LU, He, OGURA, Daichi, IMAIZUMI, Hiroshi
Organizer
The 44th Annual meeting on Radioisotope and Radiation Research
Place of Presentation
NIHON SEINENKAN, Tokyo
Year and Date
2007-07-06
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Environmental Assessment of Pollutants in Lagoon and River Waters in Niigata Prefecture2007
Author(s)
AMANO, Yoshiyuki, KANO, Naoki, TAZAWA, Masaru, KOYAMA, Takeshi, IMAIZUMI, Hiroshi
Organizer
The 44th Annual meeting on Radioisotope and Radiation Research
Place of Presentation
NIHON SEINENKAN, Tokyo
Year and Date
2007-07-06
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Behavior of Environmental Pollutant and Water Quality in Lagoon Waters in Niigata Prefecture, Japan2006
Author(s)
T, Koyama., N, Kano, M., Tazawa, Y, Amano, H, Lu, H, Imaizumi
Organizer
The 68th Analytical Chemistry Forum in The Japan Society for Analytical ,Chemistry
Place of Presentation
Utsunomiya University
Year and Date
2006-05-19
Description
「研究成果報告書概要(欧文)」より
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