Frontiers of Environmental Science & Engineering ( IF 6.4 ) Pub Date : 2020-04-10 , DOI: 10.1007/s11783-020-1243-z Yapeng Song , Hui Gong , Jianbing Wang , Fengmin Chang , Kaijun Wang
Triallyl isocyanurate (TAIC, C12H15N3O3) has featured in wastewater treatment as a refractory organic compound due to the significant production capability and negative environmental impact. TAIC degradation was enhanced when an ozone(O3)/ultraviolet(UV) process was applied compared with the application of an independent O3 process. Although 99% of TAIC could be degraded in 5 min during both processes, the O3/UV process had a 70%mineralization rate that was much higher than that of the independent O3 process (9%) in 30 min. Four possible degradation pathways were proposed based on the organic compounds of intermediate products identified during TAIC degradation through the application of independent O3 and O3/UV processes. pH impacted both the direct and indirect oxidation processes. Acidic and alkaline conditions preferred direct and indirect reactions respectively, with a pH of 9 achieving maximum Total Organic Carbon (TOC) removal. Both CO32– and HCO3– decreased TOC removal, however only CO32– negatively impacted TAIC degradation. Effects of Cl– as a radical scavenger became more marked only at high concentrations (over 500 mg/L Cl–). Particulate and suspended matter could hinder the transmission of ultraviolet light and reduce the production of HO$ accordingly.
中文翻译:
通过应用O 3 / UV工艺增强三烯丙基异氰脲酸酯(TAIC)的降解:性能优化和降解途径
三烯丙基异氰脲酸酯(TAIC,C 12 H 15 N 3 O 3)由于其显着的生产能力和负面的环境影响而在废水处理中作为难处理的有机化合物。与采用独立的O 3工艺相比,采用臭氧(O 3)/紫外线(UV)工艺可提高TAIC的降解率。尽管在这两个过程中5分钟内都可以降解99%的TAIC,但O 3 / UV过程的矿化率高达70%,远高于独立O 3的矿化率。在30分钟内处理(9%)。根据在TAIC降解过程中通过应用独立的O 3和O 3 / UV工艺鉴定出的中间产物的有机化合物,提出了四种可能的降解途径。pH值影响直接和间接氧化过程。酸性和碱性条件分别优选直接和间接反应,pH为9时可最大程度地去除总有机碳(TOC)。CO 3 2 –和HCO 3 –都降低了TOC的去除,但是只有CO 3 2 –对TAIC的降解有负面影响。的Cl影响-仅在高浓度变得更加显着的自由基清除剂(超过500毫克/升氯–)。颗粒和悬浮物可能会阻碍紫外线的透射,从而降低HO $的产生。