BAP/O_(3)复合氧化体系对SMP的降解性能

Degradation of SMP by BAP/O_(3) composite oxidation system

研究了碳酸氢钠活化过氧化氢法(BAP)、芬顿高级氧化技术(Fenton)、臭氧氧化技术(O_(3))及其复合工艺对三磺钻井液中的主要成分磺化酚醛树脂(SMP)的降解效能。遴选出BAP/O_(3)复合体系作为降解磺化酚醛树脂的最佳工艺,并探究了复合氧化相互作用机理。结果表明,复合配方去除SMP效果优劣顺序为(BAP/O_(3))>(BAP/Fenton/O_(3))>(BAP/Fenton)>(Fenton/O_(3));除BAP和Fenton分段复合取得更佳效果外,其他3种复合配方均在同时添加时取得更佳的降解效果;BAP/O_(3)复合对SMP取得了最佳的降解和矿化作用,最大SMP去除率为95.92%。淬灭剂实验表明,BAP/O_(3)复合氧化体系中的主要活性氧化剂为碳酸根自由基(·CO_(3)^(-))、超氧自由基(O_(2)^(-·))和羟基自由基(·OH),其中·CO_(3)^(-)及其诱发的次生反应起到了关键作用。

In this study,the degradation efficacies of sodium bicarbonate-activated hydrogen peroxide(BAP),Fenton advanced oxidation(Fenton),ozone oxidation(O_(3)),and their composite processes on sulfonated phenolformaldehyde resins(SMP),which are the main components of trisulfuric drilling fluids,were compared.The BAP/O_(3) composite system was selected as the best process for degrading sulfonated phenolic resins,and the composite oxidation interaction mechanism was also investigated.The results showed that the order of the composite formulations for SMP removal was(BAP/O_(3))>(BAP/Fenton/O_(3))>(BAP/Fenton)>(Fenton/O_(3)).Except for the segmental composites of BAP and Fenton with a better performance,other three composite formulations adding at the same time also achieved better degradation effects.BAP/O_(3) composite achieved the optimal degradation and mineralization of SMP with the maximum removal rate of 95.92%.The quenching experiments showed that the main active oxidants in the BAP/O_(3) composite oxidation system were carbonate radicals(·CO_(3)^(-)),superoxide radicals(O_(2)^(-·))and hydroxyl radicals(·OH),of which·CO_(3)^(-)and its induced secondary reaction played key roles.