有氧条件下黄铁矿活化过硫酸钠降解对氯苯胺的研究

Degradation of P-chloroaniline in Water by Pyrite Activated Persulfate under Aerobic Conditions

文章研究了在有氧条件下黄铁矿(Fe S2)活化过硫酸盐(PS)降解对氯苯胺(PCA)。探讨了初始p H、Fe S2投加量、初始PS浓度,考察了水体系中溶解氧对PCA降解的影响。结果表明有氧条件下有利于PCA降解率,PCA降解率随着Fe S2投加量或PS浓度的增加而增加,但随着初始p H的增加而降低。采用乙醇,叔丁醇和1,4-苯醌来考察硫酸自由基(SO4?-),羟基自由基(OH?),超氧自由基(O2?-)的存在与作用。结果说明SO4?-通过Fe S2/PS/Air体系中作为PCA的降解重要作用。

The removal of p-chloroaniline（PCA） by pyrite（Fe S2） activated persulfate（PS） under aerobic conditions has been performed in the study. The effects of PS concentration, Fe S2 addition and initial p H on the degradation of PCA were investigated. The results showed that under aerobic conditions favor the degradation rate PCA, PCA removal rate increased with the increase of Fe S2 dosage or PS concentration, but decreased with the increase of initial p H. The scavenging effect was examined by using ethanol, tert-butyl alcohol and 1,4-benzoquinone to evaluate the roles of sulfate radical, hydroxyl radical and superoxide radical. The results indicated that sulfate radicals played important roles in the degradation of PCA by Fe S2/PS/Air process.