Development of an adsorbent, coal fly ash and cement mixture to remove hydrogen sulfide

2015 Fiscal Year Final Research Report

• Project/Area Number: 25740038
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Modeling and technologies for environmental conservation and remediation
• Research Institution: Kobe University
• Principal Investigator: ASAOKA Satoshi 神戸大学, 内海域環境教育研究センター, 助教 (60548981)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 石炭灰 / 硫化物イオン / 硫化水素 / 閉鎖性水域 / 環境修復 / リサイクル / 富栄養化

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.%.

Free Research Field

環境学