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Debromination effect and mechanism of 2,4,6-tribromophenol by UV/sodium sulfite system
Received date: 2020-06-28
Online published: 2020-12-15
The debromination effect and influencing factors of 2,4,6-TBP in UV/SO32-system were examined,and the debromination process,degradation mechanism and degradation pathway of 2,4,6-TBP in reduction system were analyzed.Results showed that：the degradation effect of UV/SO32-reduction system on 2,4,6-TBP was significantly higher than that of UV system alone.Na2SO3 concentration,pH and reaction temperature had significant effects on the degradation effect of reduction system.With the increase of Na2SO3 concentration,pH and reaction temperature,the degradation effect of UV/SO32- system 2,4,6-TBP increased gradually.The quasi-first-order kinetic equation could describe the degradation process of the target pollutant in the reduction system at different Na2SO3 concentrations and reaction temperatures.The addition of hydrated electron capture agent could effectively inhibit the debromination reaction of 2,4,6-TBP.The reduction rate and bromide ion yield of the pollutants in the UV/SO32- system were higher than that of the UV system alone.2,4,6-TBP was degraded into low toxicity substances by hydration electrons in the reduction system.
Xiao Zhang , Ting Cheng , Chen Chen , Jinnan Wang , Gang Chen , Qin Deng , Lei Wang . Debromination effect and mechanism of 2,4,6-tribromophenol by UV/sodium sulfite system[J]. Inorganic Chemicals Industry, 2020 , 52(12) : 69 -74 . DOI: 10.11962/1006-4990.2020-0008
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