石炭灰造粒物による硫化物イオンの除去 <論文>

Removal of Hydrogen Sulfide Using Granulated Coal Ash <Original Paper>

浅岡 聡

山本 民次

早川 慎二郎

水環境学会誌

Hydrogen sulfide is highly toxic and fatal to benthic organisms. It also depletes dissolved oxygen and generates blue tide when oxidized. Therefore, it should be controlled to maintain healthy ecosystems. The purpose of this study is to evaluate the removal of hydrogen sulfide from seawater using granulated coal ash produced from coal thermal electric power stations. The batch experiments revealed that the removal kinetics of hydrogen sulfide were expressed as a first-order rate equation and that the adsorption maximum of hydrogen sulfide was 108 mg-S · g-1. The K-edge X-ray adsorption fine structure spectra of sulfur adsorbed by granulated coal ash indicated that hydrogen sulfide was adsorbed as sulfur and formed FeS2 when the hydrogen sulfide concentration was high. Results imply that applying granulated coal ash to organically enriched sediment can effectively reduce the concentration of hydrogen sulfide in interstitial water.

adsorption

enclosed water body

coal ash

hydrogen sulfide

sediment

建設工学・土木工学 [ 510 ]

日本語

日本水環境学会

Copyright (c) 2010 社団法人 日本水環境学会

本文データはJ-STAGEから複製したものである

[ISSN] 0916-8958

[DOI] 10.2965/jswe.32.363

[NCID] AN10372439

[DOI] http://dx.doi.org/10.2965/jswe.32.363