Degradation of atrazine by UV/chlorine: Efficiency, influencing factors, and products

Kong, Xiujuan; Jiang, Jin; Ma, Jun; Yang, Yi; Liu, Weili; Liu, Yulei

doi:10.1016/j.watres.2015.11.068

Cited by 293 publications

(124 citation statements)

References 45 publications

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“…Figures 9 and 10 display the decomposition of CIP at different HA dosages (0.1 to 10 mg/L) in UV/chlorine and UV/PS, respectively, at initial CIP concentration of 1 μM, oxidant dosage of 1 mM, and pH 0 7.4. The presence of HA inhibited the degradation of the target pollutant in both the UV-based AOPs, consistent with the reports of most studies (Kong et al, 2016;Liu et al, 2016;Lu et al, 2018). The CIP degradation was significantly obstructed with an increasing HA concentration.…”

Section: Research Articlesupporting

confidence: 90%

Comparison of ciprofloxacin degradation in reclaimed water by UV/chlorine and UV/persulfate advanced oxidation processes

Yang

Chen

et al. 2019

Water Environment Research

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This study analyzed the ciprofloxacin (CIP) degradation in real reclaimed water through UV/chlorine and UV/persulfate (UV/PS) advanced oxidation processes. The influence of oxidant dosage, pH, inorganic anions, and humic acid (HA) on the oxidation capacity and performances of various UV‐based processes was investigated. The results revealed that the CIP degradation rate constants in the UV/chlorine and UV/PS processes were higher than that in UV/H2O2, direct‐UV, NaClO, and K2S2O8 processes. The removal rate peaked at 0.1 mM oxidant dosage for 1 μM CIP, while the rate constant was highest at pH 5 (UV/chlorine) and pH 7 (UV/PS). The presence of Cl−, HCO3−, and HA inhibited CIP removal in both processes. The degradation rate observed in reclaimed water was high, but still lower than that in laboratory water by 9.2 (UV/chlorine) and 9 (UV/PS) times. The UV/chlorine and UV/PS processes were found to be more cost‐effective and hence more feasible in removing refractory compounds in reclaimed water. Practitioner points The addition of oxidant and UV irradiation together had a pronounced promotion in the degradation of CIP. Cl· and SO4·− had potential importance for enhancing CIP degradation in UV/chlorine and UV/PS process, respectively. UV/chlorine and UV/PS processes exhibited effective removal capability to CIP in real reclaimed water.

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Section: Research Articlesupporting

confidence: 90%

Comparison of ciprofloxacin degradation in reclaimed water by UV/chlorine and UV/persulfate advanced oxidation processes

Yang

Chen

et al. 2019

Water Environment Research

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“…Hydroxyl radicals and reactive chlorine species (e.g., • Cl and • Cl 2 − ) are the primary reactive species during the UV/chlorine AOP, and the contributions of • Cl 2 – are negligible due to its generally less reactivity with organic substances . Meanwhile, many studies have reported the application of the UV/chlorine process, the roles of • OH and • Cl in the degradation of pollutants have not been distinguished except for the case of benzoic acid . As the rates of ATL degradation during the photo‐electrolysis processes followed first order kinetics, a kinetic model can be developed to describe the degradation of ATL as shown in Eq.…”

Section: Resultsmentioning

confidence: 99%

Degradation of Atenolol with Electrochemical Oxidation at Mixed Metal Oxide Electrodes Assisted by UV Photolysis

Zhu

Dong

Zhou

2018

CLEAN Soil Air Water

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Electrochemical oxidation has drawn considerable research attention for the destruction of organic contaminants. This study utilizes the combination of electrolysis and the UV photolysis process to degrade the β‐blocker atenolol (ATL). The results show that the combination of electrolysis and UV photolysis is superior to a single process alone based on the removal rates of ATL and electrical efficiency per order (EE/O). In situ electrogenerated chlorine is confirmed to be responsible for ATL degradation with NaCl electrolytes, and mixed metal oxide (MMO) anodes play a more significant role in the generation of active chlorine than platinum (Pt) anodes. Moreover, reactive species (hydroxyl radical •OH and chlorine radical •Cl) mainly contributed to ATL degradation during the photo‐electrolysis process. Increasing the concentration of NaCl electrolytes and applied current densities can enhance the ATL degradation. Finally, major intermediate products are identified, and a possible degradation pathway of ATL is proposed during the photo‐electrolysis processes. This study demonstrate that the photo‐electrolysis process can be considered as a potential technology for the destruction of pharmaceutical pollutants in water.

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“…Constatou-se que o processo UV/Cloro compete economicamente com o processo UV/H 2 O 2 . Adicionalmente, Kong et al (2016) estudaram a degradação do pesticida atrazina pelo processo UV/Cloro e foi observado que a remoção foi mais eficiente que o processo UV/H 2 O 2 .…”

Section: Aplicaçõesunclassified

Advanced oxidation processes: a review regarding the fundamentals and applications in wastewater treatment and industrial wastewater

Araújo¹,

Antonelli²,

Gaydeczka³

et al. 2016

Rev. ambiente água

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RESUMOA contaminação de águas por espécies tóxicas ou recalcitrantes gera grandes impactos ambientais. Nesse contexto, os Processos Oxidativos Avançados (POAs), tecnologias que utilizam principalmente o radical hidroxila (HO • ) para a oxidação dos poluentes, têm se destacado como métodos alternativos promissores no tratamento de águas residuais e efluentes industriais. Os POAs têm sido considerados uma estratégia eficaz do ponto de vista técnico, econômico e ambiental para a degradação de poluentes presentes em águas residuais e efluentes industriais, apesar de possuir limitações como alto custo das fontes de energia, desenvolvimento de novos materiais catalíticos de baixo custo e construção de reatores em escala real. Há uma grande relevância na aplicação desses processos em escala industrial mediante a otimização desses fatores de eficácia. Sendo assim, o objetivo deste trabalho foi realizar um levantamento bibliográfico sobre os POAs e apresentar dados a respeito da eficiência desses processos na degradação de poluentes, comparando os embasamentos teóricos e a sua aplicação industrial. Diante disso, os fundamentos e aplicações dos principais POAs (químicos, fotoquímicos, eletroquímicos, sonoquímicos, sonoeletroquímico e processos baseados em ozônio), bem como suas vantagens e desvantagens foram descritos nesta revisão da literatura.

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Degradation of atrazine by UV/chlorine: Efficiency, influencing factors, and products

Cited by 293 publications

References 45 publications

Comparison of ciprofloxacin degradation in reclaimed water by UV/chlorine and UV/persulfate advanced oxidation processes

Comparison of ciprofloxacin degradation in reclaimed water by UV/chlorine and UV/persulfate advanced oxidation processes

Degradation of Atenolol with Electrochemical Oxidation at Mixed Metal Oxide Electrodes Assisted by UV Photolysis

Advanced oxidation processes: a review regarding the fundamentals and applications in wastewater treatment and industrial wastewater

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