| Project/Area Number |
17K06623
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Civil and environmental engineering
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| Research Institution | Fukuoka University |
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Principal Investigator |
Yanase Ryuji 福岡大学, 公私立大学の部局等, 教授 (20131849)
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| Co-Investigator(Kenkyū-buntansha) |
佐野 彰 福岡大学, 工学部, 助教 (90432070)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 水銀廃棄物 / 埋立処分 / 水銀流出特性 / 水銀廃棄物の埋立手法 / 最終処分 / 埋立地 / 水銀収支 |
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| Outline of Final Research Achievements |
The Minamata Convention on Mercury (2017) emphasized mercury (Hg) preventative management. Hg release from landfills poses serious health and environmental risks. We investigated Hg behavior of sulfurized/solidified Hg wastes using lysimeters simulated landfill to ensure the safety of landfilled Hg wastes. The five years lysimeter experiment showed sulfurized Hg (HgS) waste become unstable in landfill situations; dissolved Hg was detected in leachate. Cement solidification to HgS waste enhanced the stability in landfill situations; Hg emission from lysimeter with the solidified HgS waste was extremely law (less than 0.001%). And then, comparison of the lysimeter experiment for different landfill types and patterns indicated that semi-aerobic type landfill inhibited Hg emission and aquifer and alkaline components in landfill layer were related to Hg dissolution and diffusion.
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| Academic Significance and Societal Importance of the Research Achievements |
水銀廃棄物の埋立処分に伴う水銀流出抑制に必要な最適な条件は、廃水銀を硫化物化した黒色硫化水銀の固化物が対象となる。また、最適な埋立条件は洗浄した固化物を準好気性埋立地の上層・中層域の非滞水部へ埋立処分することで、浸出水や大気拡散による水銀の流出が法規制を満足でき、長期亘って水銀流出の抑制が可能で、水銀廃棄物の処理処分時の環境対策として提言できた。
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