| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
Hydrogen sulfide exerts a negative impact on aquatic organisms. However, a high level of hydrogen sulfide is observed in eutrophic marine sediment pore waters throughout the world. Therefore, it is very important to remove hydrogen sulfide in sediments to maintain healthy ecosystems and support sustainable aquaculture activities. To remediate enclosed water bodies, FAC adsorbent was made by mixing fly ash from coal electric power plants with cement. FAC adsorbents with different mixing ratios of fly ash and cement were prepared and evaluated in terms of hydrogen sulfide removal performances. The removal rate of hydrogen sulfide reached the maximum when fly ash was mixed with the cement at ratio of 87 or 95wt.%. On the one hand, when the mixing ratio of fly ash exceeded 95%, the compressive strength of the materials was significantly decreased for field application. Thus the optimum mixing ratio of fly ash to produce FAC adsorbent was 87wt.%.
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