Removal of metronidazole and amoxicillin mixtures by UV/TiO2 photocatalysis: an insight into degradation pathways and performance improvement

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

doi:10.1007/s11356-019-04683-4

Cited by 40 publications

(14 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…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%

“…For amoxicillin AMX, it was also analyzed by two other methods, which are identified by Chen et al [106]. They observed that AMX was completely removed after 90 min of treatment using carbon quantum dots modified potassium titanate nanotubes (CQDs/K 2 Ti 6 O 13 ) under UV irradiation (between 365 and 385 nm), and Tran et al [110] reported a percentage of elimination of AMX and metronidazole of more than 70% after 120 min of treatment by UV/TiO 2 photocatalysis at pH medium.…”

Section: Removal Of Different Pharmaceuticals By Advanced Oxidation Processesmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

Section: Removal Of Different Pharmaceuticals By Advanced Oxidation Processesmentioning

confidence: 79%

Section: Removal Of Different Pharmaceuticals By Advanced Oxidation Processesmentioning

confidence: 99%

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

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Normally, the photocatalytic process is based on the photogeneration of electron-hole pairs, which will initiate redox reactions with the species adsorbed on the surface of the catalysts. In the photocatalytic process, OH radicals originating from the oxidation of OHor H 2 O through the photogenerated electron-hole pairs in the presence of oxygen have been considered as the major reactants responsible for the photocatalytic oxidation of organic materials and the degradation of pollutants [22,23,56]. Consequently, improved electronic properties can be linked to an enhanced photocatalytic activity.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Potassium-Doped Titanium Oxide Nanostructure (KTiOxs)/AlO(OH) Composites for Enhanced Photocatalytic Performance

et al. 2021

View full text Add to dashboard Cite

Generally, nanoparticles (NPs) are used as photocatalysts, which sometimes results in difficulties in the separation and recycling of photocatalysts from suspensions after their application in water and wastewater treatment, which hinders industrial applications of NPs that are too fine to be removed by gravitational settling. This can be solved by using support NPs to overcome these problems. -OH enrich AlO(OH), which is produced by a steam coating process, has been could be used as a possible support, because the -OH groups on the surface can interact with foreign molecules; thus, various composite functional materials can be prepared. Potassium doped titanium oxide NPs, which are produced by a wet corrosion process, namely KTiOxs, have been selected as photocatalysts, because KTiOxs have sufficient K+ ions, thereby expecting the chemical bonding with -OH group from AlO(OH). This study fabricated a novel photocataysis system made by combining KTiOxs as catalysts and AlO(OH) as the catalysts’ support, namely KTiOxs/AlO(OH) composites. The KTiOxs nanowires, obtained from 10 mol/L of a KOH solution treated with Ti and AlO(OH) at 280 °C for 24 h through a steam coating process, yielded the highest surface area and the highest photocatalytic performance.

show abstract

“…For example, the use of photoelectric-Fenton oxidation (PEF) technology for the treatment of ampicillin [ 13 ]; the use of ionizing radiation to degrade penicillin [ 14 ]; and the use of UV/TiO 2 photocatalytic degradation of amoxicillin can achieve amoxicillin degradation. Penicillin can be degraded by nano Fe/Ni (B-Fe/Ni) supported by functional bentonite [ 15 ], Zinc-Loaded materials on a goethite surface [ 16 ], CoFe 2 O 4 @CuS magnetic nanocomposite and so on [ 17 ]. However, these methods are costly, the processing conditions are harsh, and it is difficult to scale up.…”

Section: Introductionmentioning

confidence: 99%

Enzyme-catalyzed biodegradation of penicillin fermentation residues by β-lactamase OtLac from Ochrobactrum tritici

et al. 2021

View full text Add to dashboard Cite

Background Biodegradation of antibiotics is a promising method for the large-scale removal of antibiotic residues in the environment. However, the enzyme that is involved in the biodegradation process is the key information to be revealed. Results In this study, the beta-lactamase from Ochrobactrumtritici that mediates the biodegradation of penicillin V was identified and characterized. When searching the proteins of Ochrobactrumtritici, the β-lactamase (OtLac) was identified. OtLac consists of 347 amino acids, and predicted isoelectric point is 7.0. It is a class C β-lactamase according to BLAST analysis. The coding gene of OtLac was amplified from the genomic DNA of Ochrobactrumtritici. The OtLac was overexpressed in E. coli BL21 (DE3) and purified with Ni2+ column affinity chromatography. The biodegradation ability of penicillin V by OtLac was identified in an in vitro study and analyzed by HPLC. The optimal temperature for OtLac is 32 ℃ and the optimal pH is 7.0. Steady-state kinetics showed that OtLac was highly active against penicillin V with a Km value of 17.86 μM and a kcat value of 25.28 s−1 respectively. Conclusions OtLac demonstrated biodegradation activity towards penicillin V potassium, indicating that OtLac is expected to degrade penicillin V in the future.

show abstract

Removal of metronidazole and amoxicillin mixtures by UV/TiO2 photocatalysis: an insight into degradation pathways and performance improvement

Cited by 40 publications

References 53 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

Facile Synthesis of Potassium-Doped Titanium Oxide Nanostructure (KTiOxs)/AlO(OH) Composites for Enhanced Photocatalytic Performance

Enzyme-catalyzed biodegradation of penicillin fermentation residues by β-lactamase OtLac from Ochrobactrum tritici

Contact Info

Product

Resources

About