Development of the environmental remediation materials for decomposition of refractory organic matter in marine sediments using the oxidation catalyst doped granulated coal ash

2019 Fiscal Year Final Research Report

• Project/Area Number: 16H05892
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• 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): 2016-04-01 – 2020-03-31
• Keywords: 残留性有機汚染物質 / 有機フッ素化合物 / 難分解性有機物 / 瀬戸内海 / 堆積物 / 石炭灰造粒物 / ヒューミン

Outline of Final Research Achievements

The purposes of this study are to (1) quantify labile and refractory organic matter in coastal marine sediments from the Seto Inland Sea, Japan, and to (2) develop an environmental remediation material for decomposition of refractory organic matter in marine sediments. Refractory organic matter content in sediments ranged from 4.7 to 21.4 mg/g, a percent composition equivalent to 72 to 94% of TOC. The concentrations of perfluorocarboxylic acid in surface sediments from the Sea ranged from 0.05 to 0.67 ng/g. The concentrations of HCHs, DDTs, and CHLs in sediments from the Sea were <0.002 to 1.20 ng/g, 0.01 to 2.51 n/g, and 0.01 to 0.48 ng/g, respectively. The organic matter decomposition experiments were carried out to optimize the environmental remediation materials. When the granulated coal ash which was prepared by mixing coal fly ash and blast furnace cement was applied to the sediments, the organic matter decomposition was enhanced compared to control.

Free Research Field

環境分析化学

Academic Significance and Societal Importance of the Research Achievements

近年，河川や湖沼の有機物の組成が生物に分解されにくい難分解性成分が増えている報告を受け，本研究では知見が不足している沿岸域の堆積物に含まれる難分解性有機物を定量的に把握した点で学術的意義がある．また，ストックホルム条約の発効によって，随時，廃絶・使用が制限されたはずの残留性農薬が，近年堆積したと考えられる瀬戸内海表層堆積物において検出されていることがわかった．引き続き，残留性有機汚染物質の環境動態の解明が必要であることを示した点で学術的・社会的意義がある．