Effects of water matrix components on degradation efficiency and pathways of antibiotic metronidazole by UV/TiO2 photocatalysis

Tran, Mai Lien; Fu, Chun‐Chieh; Juang, Ruey‐Shin

doi:10.1016/j.molliq.2018.11.155

Cited by 72 publications

(14 citation statements)

References 39 publications

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“…However, for photolysis at pH initial 6.5, the COD was 83% and 11% after 3 h, whereas Méndez-Arriaga et al [23] showed the opposite in aqueous solution of 0.8 mmol/L; from their analysis, they noted that 3 h of photolysis process treatment resulted in 90% removal of NPX with just 5% of mineralization, but under the TiO 2 photocatalytic process, only 40% of removal and more than 20% mineralization resulted. As for antibiotics, many studies were observed in Table 3, [97,101,[105][106][107][108][109][110][111][112]; they all agree on the efficiency of the photocatalytic process for the removal of different antibiotics drugs such as Ciptofloxacin CIP, which was completely removed from urban wastewater even before 20 min of treatment when they added Fe 2+ and TiO 2 as catalysts in the wastewater treatment plants [101]. Additionally, this drug was eliminated under UVA light by combining two catalysts: TiO 2 and ZnO [109].…”

Section: Removal Of Different Pharmaceuticals By Advanced Oxidation Processesmentioning

confidence: 79%

Removal of Pharmaceuticals from Water by Adsorption and Advanced Oxidation Processes: State of the Art and Trends

et al. 2021

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Pharmaceutical products have become a necessary part of life. Several studies have demonstrated that indirect exposure of humans to pharmaceuticals through the water could cause negative effects. Raw sewage and wastewater effluents are the major sources of pharmaceuticals found in surface waters and drinking water. Therefore, it is important to consider and characterize the efficiency of pharmaceutical removal during wastewater and drinking-water treatment processes. Various treatment options have been investigated for the removal/reduction of drugs (e.g., antibiotics, NSAIDs, analgesics) using conventional or biological treatments, such as activated sludge processes or bio-filtration, respectively. The efficiency of these processes ranges from 20–90%. Comparatively, advanced wastewater treatment processes, such as reverse osmosis, ozonation and advanced oxidation technologies, can achieve higher removal rates for drugs. Pharmaceuticals and their metabolites undergo natural attenuation by adsorption and solar oxidation. Therefore, pharmaceuticals in water sources even at trace concentrations would have undergone removal through biological processes and, if applicable, combined adsorption and photocatalytic degradation wastewater treatment processes. This review provides an overview of the conventional and advanced technologies for the removal of pharmaceutical compounds from water sources. It also sheds light on the key points behind adsorption and photocatalysis.

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Section: Removal Of Different Pharmaceuticals By Advanced Oxidation Processesmentioning

confidence: 79%

Removal of Pharmaceuticals from Water by Adsorption and Advanced Oxidation Processes: State of the Art and Trends

et al. 2021

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“…There are few reports on photocatalytic degradation of metronidazole (MNZ) in water. Some of these reports were pH-sensitive and in some others, an extra chemical oxidant was used to increase degradation efficiency [[4], [5], [6], [7]]. Thorough review of the literature yielded no research regarding MNZ removal from aqueous solutions using metal-organic frameworks (MOFs).…”

Section: Methodsmentioning

confidence: 99%

A microwave assisted method to synthesize nanoCoFe2O4@methyl cellulose as a novel metal-organic framework for antibiotic degradation

et al. 2019

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“…The DPs were searched for by two approaches: semi-targeted analysis using pseudo MRM mode (p-MRM) and non-targeted analysis using different MS/MS modes. Information on MET degradation products was selected from the literature, and then literature transitions for DPs were introduced to the method as MRM transitions [41][42][43][44]. The ion source parameters were the same as for targeted analysis.…”

Section: Determination Of Metronidazole Degradation Productsmentioning

confidence: 99%

“…In the photocatalysis process, incomplete degradation of contaminants and formation of degradation products (DPs) may occur [43]. Based on the obtained experimental results, where the removal rate of MET was in the range of 60-95%, while MD was in the range of 36.0-70.3%, it can be assumed that additional DPs are formed during the photodegradation process of MET.…”

Section: Identification Of Degradation Products In Post-reaction Mixturesmentioning

confidence: 99%

Heterogeneous Photocatalysis of Metronidazole in Aquatic Samples

et al. 2021

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Metronidazole (MET) is a commonly detected contaminant in the environment. The compound is classified as poorly biodegradable and highly soluble in water. Heterogeneous photocatalysis is the most promoted water purification method due to the possibility of using sunlight and small amounts of a catalyst needed for the process. The aim of this study was to select conditions for photocatalytic removal of metronidazole from aquatic samples. The effect of catalyst type, mass, and irradiance intensity on the efficiency of metronidazole removal was determined. For this purpose, TiO2, ZnO, ZrO2, WO3, PbS, and their mixtures in a mass ratio of 1:1 were used. In this study, the transformation products formed were identified, and the mineralization degree of compound was determined. The efficiency of metronidazole removal depending on the type of catalyst was in the range of 50–95%. The highest MET conversion (95%) combined with a high degree of mineralization (70.3%) was obtained by using a mixture of 12.5 g TiO2–P25 + PbS (1:1; v/v) and running the process for 60 min at an irradiance of 1000 W m−2. Four MET degradation products were identified by untargeted analysis, formed by the rearrangement of the metronidazole and the C-C bond breaking.

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Effects of water matrix components on degradation efficiency and pathways of antibiotic metronidazole by UV/TiO2 photocatalysis

Cited by 72 publications

References 39 publications

Removal of Pharmaceuticals from Water by Adsorption and Advanced Oxidation Processes: State of the Art and Trends

Removal of Pharmaceuticals from Water by Adsorption and Advanced Oxidation Processes: State of the Art and Trends

A microwave assisted method to synthesize nanoCoFe2O4@methyl cellulose as a novel metal-organic framework for antibiotic degradation

Heterogeneous Photocatalysis of Metronidazole in Aquatic Samples

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