Abstract
In view of a large amount of sulfur ions contained in oilfield sewage, finding an efficient method for desulfurization to reduce the sulfide content of sulfide in oilfield sewage has become one of the topics urgently studied by oilfield workers. In this paper, the oxidation method is used to treat sulfur ions in oilfield sewage, and it is oxidized to harmless elemental sulfur or high-priced sulate. The effects of pH, molar ratio, reaction time, temperature and concentration on the removal rate of sulfur ions were investigated. The optimal reaction conditions were determined that the initial concentration of simulated water was 75 mg/L, pH=8, the molar ratio of sodium persulfate and sodium sulfide was 1.2: 1, the reaction time was 30 minutes. The maximum removal rate of sulfur ions by sodium sulfate can reach 96.11% at 35°C.
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