REPRODUCTION OF THE SUPPRESSION EFFECT OF IRON ON SULFIDE RELEASE : VERIFICATION OF THE SUPPRESSION EFFECT OF IRON

Abstract

 In eutrophic waters such as Mikawa Bay, the bottom water becomes anoxic in summer, and sulfide is leached into the bottom water due to sulfate reduction in the sediment surface layer, leading to environmental problems such as blue tide.As a method to improve the bottom sediment environment, the addition of iron materials to the bottom sediment, inspired by the natural phenomenon of iron curtain (removal of hydrogen sulfide by reaction with iron), has been devised, but its quantitative evaluation has not yet been achieved.In this study, we developed a sediment model focusing on the sulfur circulation process to quantitatively evaluate the inhibitory effect of iron addition on sulfide release, and performed reproducible calculations of sulfide elution experiments.In this study, we developed a sediment model focusing on the sulfur cycling process in order to quantitatively evaluate the effect of iron addition to the sediment.