FAT ADSORPTION AND SEDIMENT IMPROVEMENT OF GRANULATED COAL ASH AS A COVERING MATERIAL ON REDUCED SEDIMENT

It has confirmed that covering sea sand alternative material, granulated coal ash (GCA) which made by granulating fly ash, on sediment can improve both reduced sediment and water environments. Specifically, GCA strongly lowered the fat content of sediment covered by GCA. In this paper, we aim at revealing GCA effects on fat adsorption and the dissolved oxygen (DO) consumption through laboratory experiment. We also examine the capacity of GCA on preserving alkaline conditions in the GCA layer. We confirmed that GCA could trap the substances eluted from sediment, lowering the DO consumption. Besides, dissolution of GCA could preserve the alkaline condition in the GCA layer.