研究了利用电厂粉煤灰作为过氧化氢催化氧化S2 - 的非均相催化剂 ,试验了各种因素对S2 - 去除率的影响 .结果表明粉煤灰具有良好的催化活性 ;常温下 ,当硫化钠和过氧化氢的起始浓度分别为 0 .2 6和 0 .2 3mol/L时 ,粉煤灰的用量仅为4% (质量分数 ,% )就可使S2 - 的去除率提高 40 %左右 ;与新灰相比 ,旧灰的活性下降了约 2 0 % . The effect of various factors on S2 - removal rate was studied by using power plant fly ash as a heterogeneous catalyst for H2O2 catalytic oxidation. The results show that fly ash has good catalytic activity. At room temperature, When the initial concentrations of sodium and hydrogen peroxide were 0.226 and 0.23mol / L respectively, the removal rate of S2 - was increased by 40% when the fly ash content was only 4% (mass fraction,%). ; Compared with the new ash, the activity of the old ash decreased by about 20%.