Author:
Liu Yucan,Zhu Kai,Zhu Huayu,Zhao Min,Huang Lihua,Dong Bin,Liu Qianjin
Abstract
AbstractPartial photooxidation of micropollutants may lead to various degradation intermediates, obviously affecting disinfection byproducts (DBPs) formation during the post-chlorination process. The photooxidation of atrazine (ATZ) in aqueous solutions with low-pressure mercury UV lamps in UV, UV/H2O2 and UV/TiO2 treatment system and the formation of chlorinated disinfection byproducts (DBPs) during subsequent chlorination processes including dichloroacetic acid (DCAA), trichloroacetic acid (TCAA), 1,1,1-trichloro-2-propanone (TCP), trichloromethane (TCM) and chloropicrin (CHP) were investigated in this study. The effect of solution pH on the oxidation pathway of ATZ in three UV photooxidation treatment process and the impact of photooxidation on the DBPs formations were assessed. Based on UPLC-ESI–MS/MS analyses, identification of main oxidation intermediates was performed and the plausible degradation pathways of ATZ in photooxidation system were proposed, indicating that photooxidation of ATZ in UV/H2O2 and UV/TiO2 process system was significantly pH-dependent processes. Dichloroacetic acid (DCAA), trichloroacetic acid (TCAA), 1,1,1-trichloro-2-propanone (TCP), trichloromethane (TCM) and chloropicrin (CHP) were detected in photooxidized ATZ solutions. Compared to the other three DBPs, TCM and TCP were the main DBPs formed. The DBPs formations were greatly promoted in oxidized ATZ solutions. Solution pH and UV irradiation time exhibited obvious impact on the DBPs formation on the basis of DBP species. The variation tendency of DBPs observed relates to the combustion of ATZ in photooxidation system and the production oxidation intermediates.
Funder
Natural Science Foundation of Shandong Province
Science Fund of Yantai University
Project of Introducing and Cultivating Young Talent in the Universities of Shandong Province
Publisher
Springer Science and Business Media LLC
Reference45 articles.
1. Singh, A. et al. Advances in controlled release pesticide formulations: Prospects to safer integrated pest management and sustainable agriculture. J. Hazard. Mater. 385, 121525.1-121525.20 (2020).
2. Glinski, D. A., Purucker, S. T., Van Meter, R. J., Black, M. C. & Henderson, W. M. Henderson, Analysis of pesticides in surface water, stemflow, and throughfall in an agricultural area in South Georgia, USA. Chemosphere 209, 496–507 (2018).
3. Sjerps, R. M. A., Kooij, P. J. F., van Loon, A. & Van Wezel, A. P. Occurrence of pesticides in Dutch drinking water sources. Chemosphere 235, 510–518 (2019).
4. Reemtsma, T., Alder, L. & Banasiak, U. Emerging pesticide metabolites in groundwater and surface water as determined by the application of a multimethod for 150 pesticide metabolites. Water Res. 47(15), 5535–5545 (2013).
5. Chen, N. et al. Transfer and degradation of the common pesticide atrazine through the unsaturated zone of the Chalk aquifer (Northern France). Environ. Pollut. 255, 113125.1-113125.10 (2019).
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献