Degradation difference of ofloxacin and levofloxacin by UV/H2O2 and UV/PS (persulfate): Efficiency, factors and mechanism

Liu, Xiaohui1,2; Liu, Ying1; Lu, Shaoyong1; Wang, Zhi3; Wang, Yongqiang1; Zhang, Guodong1; Guo, Xiaochun1; Guo, Wei4; Zhang, Tingting5; Xi, Beidou1

2020

10.1016/j.cej.2019.123987

CHEMICAL ENGINEERING JOURNAL   影响因子和分区

1385-8947

1873-3212

Chiral quinolone antibiotics, as racemate and in enantiomerically form, have been attracted extensive attention due to their same molecular structure and different pharmacological properties and toxicity in environment. The present study focused on the difference of degradation efficiency and pathway of chiral antibiotics by different AOPs technology. The degradation behaviors and differences of chiral pollutants were firstly identified. Among them, UV/PS process exhibited the best performance for the elimination of chiral pollutants removal and reduction of total organic carbon (TOC). The degradation of ofloxacin and levofloxacin revealed pronounced pH dependence in UV/H2O2 and UV/PS processes, where the impact on Levofloxacin (LEV) was greater than that on Ofloxacin (OFLO). Only a slight variation of TOC was observed to be less than 50%, where the removal efficiencies were all above 96%. SO4^•− generated in UV/PS process yields a greater mineralization of antibiotics than •OH in UV/H2O2 process. Cl⁻, NO3⁻ and NOM had inhibitory effects on OFLO and LEV degradation in both processes, while SO4²⁻ showed positive effect on UV/PS degradation. Meanwhile, chairal antibiotics removal was dominated by •OH with the second-order rate constants of 3.97 × 10⁹ and 2.48 × 10⁹ M⁻¹s⁻¹ in UV/H2O2 process, while SO4^•− played the key role in UV/PS system with second-order rate constants of 2.19 × 10¹⁰ and 2.66 × 10¹⁰ M⁻¹s⁻¹, respectively. The results of acute toxicity assay shown that OFLO exhibited higher acute toxicity than LEV, while TTC dehydrogenase activity of intermediate products of OFLO was lower than LEV. This study demonstrated that AOPs (especially UV/PS) were efficient for removing fluoroquinolone antibiotics, which can be considered as a clean and green method for the treatment of antibiotics-containing industrial wastewater.
© 2019

UV/H2O2 UV/PS Ofloxacin Levofloxacin Degradation difference

SCI ; EI

英语

ESI高被引

其他

Major Science and Technology Program for Water Pollution Control and Treatment[2018ZX07208008] ; National Natural Science Foundation of China[41877409] ; Ministry of Science and Technology of the People's Republic of China[2015FY110900] ; National Natural Science Foundation of China[]

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000507465200045

Elsevier B.V.

20200408076678

Degradation ; Efficiency ; Industrial water treatment ; Organic carbon ; Pollution ; Rate constants ; Toxicity ; Wastewater treatment

Water Treatment Techniques for Industrial Use:445.1.2 ; Industrial Wastes Treatment and Disposal:452.4 ; Medicine and Pharmacology:461.6 ; Health Care:461.7 ; Chemical Reactions:802.2 ; Organic Compounds:804.1 ; Production Engineering:913.1

ENGINEERING

Web of Science

1.State Key Laboratory of Environmental Criteria and Risk Assessment, National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China
2.School of Environment, Tsinghua University, Beijing; 100084, China
3.Key Laboratory for Environment and Disaster Monitoring and Evaluation, Hubei, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan; 430077, China
4.School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen; 518055, China
5.School of Chemical Engineering, Beijing University of Chemical Technology, Beijing; 100029, China

Liu, Xiaohui,Liu, Ying,Lu, Shaoyong,et al. Degradation difference of ofloxacin and levofloxacin by UV/H2O2 and UV/PS (persulfate): Efficiency, factors and mechanism[J]. CHEMICAL ENGINEERING JOURNAL,2020,385.

Liu, Xiaohui.,Liu, Ying.,Lu, Shaoyong.,Wang, Zhi.,Wang, Yongqiang.,...&Xi, Beidou.(2020).Degradation difference of ofloxacin and levofloxacin by UV/H2O2 and UV/PS (persulfate): Efficiency, factors and mechanism.CHEMICAL ENGINEERING JOURNAL,385.

Liu, Xiaohui,et al."Degradation difference of ofloxacin and levofloxacin by UV/H2O2 and UV/PS (persulfate): Efficiency, factors and mechanism".CHEMICAL ENGINEERING JOURNAL 385(2020).