2023 Volume 79 Issue 25 Article ID: 23-25021
In order to research the detoxification of anearobic salt water containing hydrogen sulfide, we constructed a pipeline for pumping bottom water. It was confirmed by chemical analysis that the bottom water could be pumped up to the land without loss of contained substances in the pipeline. A device for supplying dissolved oxygen was constructed, and temporal water quality changes were investigated by instrumental measurements and chemical analysis when the dissolved oxygen was supplied to pumped water. As a result, it was confirmed that hydrogen sulfide was rapidly oxidized to solid sulfur by supplying oxygen.Moreover, sulfate ions increased in anaerobic condition after supplied oxygen was consumed. When dissolved oxygen was continuously supplied to maintain aerobic conditions, sulfate ion concentration did not change. It was confirmed that conversion to sulfate ion by direct oxidation of hydrogen sulfide does not occur. After completely oxidation of hydrogen sulfide, the increase in sulfate ion concentration was observed under anaerobic condition.
