摘要
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 % .
Fly ash out of coal fired thermal power plants used as heterogeneous catalyst in the oxidation of aqueous sodium sulfide solutions with H 2O 2 in the temperature of 30—50℃ was studied and the effects of various parameters on the removal rate of S 2- were tested.The results showed that fly ash has a satisfactory catalytic activation;for an initial Na\-2S and H 2O 2 concentration of 0.26?mol/L and 0.23?mol/L respectively, the removal rates of S 2- were intensified about 40 % with only 4 % coal fly ash dosing and the deactivation of the catalytic effect of fresh fly ash was found to be less than about 20 % even after three repeated uses.
出处
《环境科学学报》
CAS
CSCD
北大核心
2000年第6期794-797,共4页
Acta Scientiae Circumstantiae
基金
原煤炭部科技发展项目!(97- 369)资助
关键词
粉煤灰
非均相催化氧化
过氧化氢
硫化钠
废水
fly ash
heterogeneous catalytic oxidation
hydrogen peroxide
sodium sulfide
