| Project/Area Number |
16510067
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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 |
Environmental technology/Environmental materials
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| Research Institution | Tokai University |
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Principal Investigator |
SATO Yoshio Tokai University, School of Marine Science and Technology, Professor (70056315)
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| Co-Investigator(Kenkyū-buntansha) |
FUKUE Masaharu Tokai University, School of Marine Science and Technology, Professor (40119699)
UENO Shinpei Tokai University, School of Marine Science and Technology, Professor (80160191)
YASUDA Kuniaki Tokai University, School of Marine Science and Technology, Professor (20138639)
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| Project Period (FY) |
2004 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,480,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥180,000)
Fiscal Year 2007: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2006: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2005: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2004: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | preservation / remediation / suspended solid / chemical oxygen demand / nutrient / trace metal / steelmakina slag / embankment material / 沿岸海域 / 底質改善 / 懸濁物質 / 栄養塩 / 微量元素 / ろ材 / 微細粒子 / 藻場 / 海水浄化船 / 鉄被膜 / 堆積物 / 沈降粒子 / 炭素繊維 / 人工藻場 / アマモ場 / 重金属 |
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| Research Abstract |
To assess the environmental preservation and remediation techniques of an enclosed water areas, seawater and lake water, suspended solids, settling particles and sediment were collected from Shimizu Port and Lake Sanaru. Suspended solids discharged from rivers and the biological particles produced in the port and lake caused a reduction in transparency and an increase in chemical oxygen demand. Trace metals, such as Mn, Co, and Pb, were highly concentrated in suspended solids. The results showed that these suspended particles could accumulate metals from seawater and lake water as effectively as biogenic particles. After particle deposition, trace metals are regenerated into seawater and lake water under anaerobic conditions. This process plays an important role in the accumulation of chemicals in water and sediments, especially in enclosed sea areas. The results showed that the concentrations of the heavy metals measured were relatively high. The concentrations of copper and zinc in the sediment samples were higher than the probable effect levels (PEL) of marine sediments provided by the Canadian Sediment Quality Guidelines. The high concentrations obtained were probably due to the high organic content resulting from humus.The separation of organic matter might be useful as a remediation technique for dredged materials.
The applicability of steelmaking slag was examined experimentally to improve the bottom sediments in several sea areas. The experimental results showed that stone-shaped steelmaking slag controlled the occurrence of sulfide, and that the materials were available as a submerged embankment material, which can be used for a base of algae and benthonic organisms. It is also found that the particles of the steelmaking slag can be an effective base and can supply nutrients for attached algae.
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