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Study on the Methods for Removing Sulfide Ion and sulfate radical from the Oilfield Sewage

Chinese Journal of Chemistry 2011年第6期29卷 1273-1277页

作者： Wang, Ying Kang, Wanli Wu, Ying Qi, Xuehong College of Chemistry and Life Sciences Shenyang Normal University Shenyang Liaoning 110034 China School of Engineering Petroleum China University of Petroleum Qingdao Shandong 266555 China School of Science China University of Petroleum Beijing 120049 China

Sulfide ion can reduce the viscosity of polymer solution. The higher the concentration of sulfide ion is, the greater the effect of viscosity on polymer is, and it directly affects oil recovery rate. Some methods for removing sulfide were studied by adding the oxidizing substances. Each method had certain effect on removing sulfide. The addition of hydrogenperoxide in the solution makes it faster to remove sulfide than flowing air in it, although the removal of sulfide is still not complete. This removal is quick when ozone takes part in, and it will spend much time with the increased volume of solution. The extent of removing sulfide was mainly related to the oxidability of re- moved substances. The stronger the oxidability of oxidizing substances was, the better the performance for sulfide removing was. In addition, part of sulfate radical in oilfield sewage could be removed by nanofiltration membrane. removal efficiency of sulfate radical is about 50%. The probability may be avoided that sulfate radical was reduced into sulfide by the sulfate-reducing bacteria （SRB） in sewage. This method could radically reduce the presence of the reduction of sulfur in sewage, and it can reduce the corrosion of underground oil pipeline.

关键词： oilfield sewage sulfide removal sulfate radical removal nanofiltration membrane

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