Remediation of Coastal Marine Sediment using Iron

摘要

Laboratory experiments were conducted to evaluate the effectiveness of iron application to surface sediment on the suppression of hydrogen sulfide release from sediments. By using sediments cores collected from Mikawa Bay, Japan at every month from June to September 2017, incubation experiments were made for three weeks under anoxic conditions with or without application of the iron containing compounds; the iron oxide or iron hydroxide. The results revealed that both uses of the iron oxide and iron hydroxide significantly reduced sulfide release flux from the sediment into the overlying water. Iron hydroxide was more effective than iron oxide in the suppression of sulfide release, as concluded from 21~-day of incubation. While, no significant difference was observed among the control group after 21day incubation. Therefore, it can be conclude that the application of iron to the sediment is a promising method to remediate contaminated sediments in eutrophic water body.