Kovács Krisztina, Farkas János, Veréb Gábor, Arany Eszter, Simon Gergő, Schrantz Krisztina, Dombi András, Hernádi Klára, Alapi Tünde
a Research Group of Environmental Chemistry, University of Szeged , Szeged , Hungary.
b Institute of Isotopes, Centre for Energy Research, Hungarian Academy of Sciences , Budapest , Hungary.
J Environ Sci Health B. 2016;51(4):205-14. doi: 10.1080/03601234.2015.1120597. Epub 2016 Jan 14.
Various types of advanced oxidation processes (AOPs), such as UV photolysis, ozonation, heterogeneous photocatalysis and their combinations were comparatively examined at the same energy input in a home-made reactor. The oxidative transformations of the phenylurea herbicides fenuron, monuron and diuron were investigated. The initial rates of transformation demonstrated that UV photolysis was highly efficient in the cases of diuron and monuron. Ozonation proved to be much more effective in the transformation of fenuron than in those of the chlorine containing monuron and diuron. In heterogeneous photocatalysis, the rate of decomposition decreased with increase of the number of chlorine atoms in the target molecule. Addition of ozone to UV-irradiated solutions and/or TiO2-containing suspensions markedly increased the initial rates of degradation. Dehalogenation of monuron and diuron showed that each of these procedures is suitable for the simultaneous removal of chlorinated pesticides and their chlorinated intermediates. Heterogeneous photocatalysis was found to be effective in the mineralization.
在一个自制的反应器中，在相同的能量输入下，对各种类型的高级氧化工艺（AOPs），如紫外光解、臭氧化、多相光催化及其组合进行了比较研究。研究了苯基脲类除草剂非草隆、灭草隆和敌草隆的氧化转化。转化的初始速率表明，紫外光解在敌草隆和灭草隆的情况下效率很高。事实证明，臭氧化在非草隆的转化中比在含氯的灭草隆和敌草隆的转化中更有效。在多相光催化中，分解速率随着目标分子中氯原子数的增加而降低。向紫外辐照溶液和/或含TiO₂的悬浮液中添加臭氧显著提高了初始降解速率。灭草隆和敌草隆的脱卤表明，这些方法中的每一种都适用于同时去除氯化农药及其氯化中间体。发现多相光催化在矿化方面是有效的。
