摘要
介绍了一种能有效清除水溶液中苯硫基甲烷(甲基苯基硫化物,CH3S-C6H5)的新型电子束放射工艺,以及pH值为5和9时的底物破坏数据。应用能预测清除效率的动力学模型,采用脉冲辐解技术测定了苯硫基甲烷与羟基自由基、水合电子和氢原子反应的总速度常数,其值分别为(9.90±0.13)×109、(3.1±0.1)×108和(3.24±0.08)×109L/(mol·s)。比较模型预测值和试验结果可知,pH值为5时结果一致,而pH值为9时清除率会被高估。认为pH值为9时出现的其他与羟基自由基、水合电子和氢原子发生反应的净化剂是造成清除效率下降的原因,而pH值为5时不会出现这种情况。
A new electron beam radiation technology that can removal thioanisole （methyl phenyl sulfide, CH3S-C6Hs ） from aqueous solution effectively was presented. The substrate degradation data at pH of 5 and 9 were introduced. The total rate constants of reaction of thioanisole with hydroxyl radicals, hydrated electrons and hydrogen atoms were measured using dynamics model predicting the removal effi- ciency and the pulse radiolysis technique. Their respective values were （9.90 ± 0.13 ） × 109, （3. 1 ± 0. 1 ） × 108 and （3.24 ±0.08） × 109 L/（mol · s）. Comparing the model predictions and the experimen- tal results, the results were consistent when pH value was 5, but the removal rate would be overestimated when pH value was 9. Other purifying agent which appeared following the reaction with hydroxyl radi- cals, hydrated electrons and hydrogen atoms at pH of 5 caused decrease in the removal efficiency. But this phenomenon did not appear when pH value was 5.
出处
《中国给水排水》
CAS
CSCD
北大核心
2014年第2期105-108,共4页
China Water & Wastewater
关键词
电子束辐射
苯硫基甲烷
清除率
electron beam radiation
thioanisole
removal rate
