LIWET, Department of Green Chemistry and Technology, Ghent University, Kortrijk, Belgium.
RUPT, Department of Applied Physics, Ghent University, Ghent, Belgium.
Environ Technol. 2019 Dec;40(28):3773-3782. doi: 10.1080/09593330.2018.1491630. Epub 2018 Jul 3.
The degradation of micropollutants (MPs), including pesticides, herbicides, pharmaceuticals and endocrine disrupting compounds, by ozone-based advanced oxidation techniques (AOP) was investigated in this study. The effect of different factors, such as ozone concentration, hydrogen peroxide concentration and initial pH, on the removal rate was studied in detail. The combination of UV with ozone/ HO increased the MPs degradation. For example, atrazine removal increased from 12.6% to 66.9%. Increasing the concentration of ozone and HO can enhance the degradation efficiency of MPs, while excess HO plays a role as a scavenger for OH. In addition, the optimizing conditions of degradation of MPs by an ozone-based AOP were investigated in this study. The optimal dosages of ozone for atrazine (ATZ), alachlor (ALA), carbamazepine (CBZ), 17-α-ethinylestradiol (EE2) and pentachlorophenol (PCP), were in the range of 0.6-0.75, while for ATZ a much higher dosage (5.4 mg/l) is needed. The optimal dosages of HO concentration were at 0.75, 0.2, 0.47, 0.75 and 0.63 mM, and pH were at 10, 10, 7, 10 and 10, and reaction time at 38.5, 33.5 43, 6 and 6 min, respectively. Ozone-based AOP and in particular combination of UV with ozone and HO is efficient to degrade atrazine, alachlor, carbamazepine, 17-α-ethinylestradiol and pentachlorophenol, and is attractive for future application of real wastewater treatment.
本研究考察了基于臭氧的高级氧化技术（AOP）对微污染物（MPs），包括农药、除草剂、药物和内分泌干扰化合物的降解作用。详细研究了不同因素，如臭氧浓度、过氧化氢浓度和初始 pH 值对去除率的影响。UV 与臭氧/H2O2 的组合提高了 MPs 的降解效率。例如，莠去津的去除率从 12.6%提高到 66.9%。增加臭氧和 H2O2 的浓度可以提高 MPs 的降解效率，而过量的 H2O2 则作为 OH 的清除剂发挥作用。此外，本研究还考察了基于臭氧的 AOP 降解 MPs 的优化条件。臭氧对莠去津（ATZ）、甲草胺（ALA）、卡马西平（CBZ）、17-α-乙炔基雌二醇（EE2）和五氯苯酚（PCP）的最佳剂量范围在 0.6-0.75 之间，而 ATZ 需要更高的剂量（5.4mg/L）。H2O2 浓度的最佳剂量分别为 0.75、0.2、0.47、0.75 和 0.63mM，pH 值分别为 10、10、7、10 和 10，反应时间分别为 38.5、33.5、43、6 和 6min。基于臭氧的 AOP 特别是 UV 与臭氧和 H2O2 的组合，能够有效地降解莠去津、甲草胺、卡马西平、17-α-乙炔基雌二醇和五氯苯酚，对于未来实际废水处理具有吸引力。
