离子色谱法测定油田采出水中溶解性总硫浓度

Determination of Dissolved Total Sulfur(TS) Concentration in Produced Wastewater in Oilfield by Ion Chromatography

利用离子色谱法和重量法分别间接测定经光电催化氧化法处理的油田采出水中溶解性总硫浓度。试验结果表明油田采出水经处理后,有机物和油被充分降解。重量法测定SO2-4,平均浓度为375 mg/L,RSD为9.80%。离子色谱法测定SO2-4,平均浓度为366 mg/L,RSD为1.20%,重现性更好。离子色谱法测出水中SO2-4浓度可以代表原水中溶解性总硫浓度,可节省大量时间。

Ion chromatography and gravimetric method were used respectively to determine the concentration of dissolved TS in oilfield produced water. The experimental results show that organic matter and oil in oilfield produced water is fully degraded in photoelectro catalytic oxidation,concentration of SO42- tested by gravimetric method is 375 mg/L in average, with 9.80 % RSD. Concentration of SO4- tested by ion chromatography is 366 mg/L in average, with 1.20 % RSD, which has better reproducibility. Ion chromatography test results of SO4- concentration can represent the dissolved TS in inlet water, and can save a lot of time.