Heterogeneous photocatalysis using UVA-LEDs for the removal of antibiotics and antibiotic resistant bacteria from urban wastewater treatment plant effluents

Biancullo, Francesco; Moreira, Nuno F.F.; Ribeiro, Ana R.; Manaia, Célia M.; Faria, Joaquim L.; Nunes, Olga C.; Castro‐Silva, Sérgio; Silva, Adrián M.T.

doi:10.1016/j.cej.2019.02.012

Cited by 147 publications

(61 citation statements)

References 59 publications

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“…Of all these methods, photocatalytic oxidation, and especially heterogeneous photocatalysis with TiO 2 , has received particular attention due to the advantages that this method offers [12]. Regarding the application of this method for treating wastewater contaminated with antibiotics, the main advantage is the possibility of simultaneous removal of antibiotics and antibiotic resistant bacteria [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Ampicillin Using PLA/TiO2 Hybrid Nanofibers Coated on Different Types of Fiberglass

Bobiricǎ

Râpă

et al. 2020

Water

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New photocatalytic membranes based on polylactic acid (PLA)/TiO2 hybrid nanofibers deposited on fiberglass supports were prepared and tested for the removal of ampicillin from aqueous solutions. The electrospinning technique was used to obtain hybrid nanofibers that were deposited on three types of fiberglass with different structures, resulting in three distinct photocatalytic membranes namely fiberglass fabric plain woven-type membrane, fiberglass mat-type membrane, and fiberglass fabric one-fold edge-type membrane. The results of the photocatalytic tests showed that the highest efficiency of ampicillin removal from aqueous solution is obtained with the fiberglass fabric plain woven-type membrane. Although it has been shown that the rate of photocatalytic degradation of ampicillin is high, being practically eliminated within the first 30 min of photocatalysis, the degree of mineralization of the aqueous solution is low even after two hours of photocatalysis due to the degradation of PLA from the photocatalytic membrane. The instability of PLA in the reactive environment of the photocatalytic reactor, evidenced by morphological, mineralogical and spectroscopic analyzes as well as by kinetic studies, is closely related to the structure of the fiberglass membrane used as a support for PLA/TiO2 hybrid nanofibers.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Ampicillin Using PLA/TiO2 Hybrid Nanofibers Coated on Different Types of Fiberglass

Bobiricǎ

Râpă

et al. 2020

Water

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“…Moreover, the microbial regrowth of the ARGs after treatment remained stable during 3 days of storage at room temperature. Another study conducted by Biancullo et al (2019) demonstrated that UV-LEDs at wavelength 381 nm combined with TiO 2 at a concentration of 1 g/L reduced the bacterial load of E. coli, enterococci, and heterotrophs and their antibiotics resistant group to about 2 log CFU/100 mL. The bacterial regrowth was observed for total heterotrophs and their antibiotics groups, after the storage of photocatalytic treated wastewater.…”

Section: Effects Of Uv-leds-based Aops On Microorganism Inactivationmentioning

confidence: 97%

“…It required less than 100 min at UV-LED power of 3 mW for complete inactivation of B. subtilis, whereas 377 nm wavelength reduced B. subtilis to less than 1 log CFU/mL at the same exposure and UV-LED power. In another study, Biancullo et al (2019) showed that the addition of TiO 2 at a concentration of 100 g/L during the UV-LED treatment at 381 nm led to a decrease of 2 log CFU/mL for heterotrophs, enterococci, and E. coli in urban wastewater. Some bacteria might exhibit some resistance to such treatment.…”

Section: Effects Of Uv-leds-based Aops On Microorganism Inactivationmentioning

confidence: 99%

“…Song, Taghipour, and Mohseni (2019) used three different LEDs of 265, 285, and 365 nm wavelengths with a relatively high output power of 10, 30, and 2,350 mW, respectively. Biancullo et al (2019) used LEDs with a higher wavelength of 381 nm that possessed a longer life span and intensity exceeding 70% after 10,000 hr of work. Similarly, 365-nm LEDs with a high power output of 1,613 mW and an efficiency of 12% were also reported (Lui, Roser, Corkish, Ashbolt, & Stuetz, 2016).…”

Section: Uv-led Advancement For Microbial Inactivationmentioning

confidence: 99%

“…Biancullo et al. (2019) used LEDs with a higher wavelength of 381 nm that possessed a longer life span and intensity exceeding 70% after 10,000 hr of work. Similarly, 365‐nm LEDs with a high power output of 1,613 mW and an efficiency of 12% were also reported (Lui, Roser, Corkish, Ashbolt, & Stuetz, 2016).…”

Section: Uv‐led Advancement For Microbial Inactivationmentioning

confidence: 99%

See 2 more Smart Citations

Recent advances on the application of UV‐LED technology for microbial inactivation: Progress and mechanism

Kebbi

Muhammad

Sant’Ana

et al. 2020

Comp Rev Food Sci Food Safe

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Conventional technologies for the inactivation of microorganisms in food products have their limitations, especially changes in quality attributes that have led to quality deterioration, low consumer acceptance, impact on the environment, and potential health hazards (carcinogens). Ultraviolet (UV) light is an emerging promising nonthermal technology employed for microbial inactivation in water, liquid, and solid food products to curtail the limitations above. This review provides an insight into UV light-emitting diodes (UV-LEDs)' potential as an alternative to the traditional UV lamps for microbial inactivation in liquid and solid media. Also, the mechanisms of inactivation of lone and combined UVA-, UVB-, and UVC-LEDs were discussed. The strategies utilized to improve the efficacy between the UV-LED treatments at various wavelengths were summarized. Combining different UV-LEDs treatments at different wavelengths have a synergistic effect and suppression of microbial cell reactivation. The UV-LED-based advanced oxidation processes (AOPs) also have high germicidal action against numerous microorganisms and are efficient for the degradation of micropollutants. Among the UV-LEDs discussed, UVC-LED has the most antimicrobial effect with the most efficient micropollutants decomposition with regards to UV-LED-based AOPs. This review has provided vital information for future application, development, and customization of UV-LED systems that can meet the food and water safety requirements and energy efficiency.

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Treatment of hospital wastewater: emphasis on ecotoxicity and antibiotic resistance genes

Kaliakatsos

Gounaki

Dokianakis

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDHospital wastewater (HWW) charges wastewater treatment plants (WWTPs) with a mixture of contaminants such as pharmaceutically active compounds (PhACs) and pathogenic bacteria. This matrix is considered highly toxic to the ecosystem and organisms, and it may induce the development of antibiotic resistant bacteria (ARB) and the transfer of antibiotic resistance genes (ARGs) within microbial communities. Conventional WWTPs cannot treat HWW effectively, because they have not been designed to confront this challenge. Therefore, this study investigated the applicability of photocatalysis to purify HWW, regarding its ecotoxicity and the removal rates of targeted substances, selected pathogenic bacteria and specific ARGs.RESULTSThe HWW samples showed high toxicity towards the bioindicator Daphnia magna population, while they also contained significant levels of ARB and ARGs. Upon application of the photocatalytic treatment, the pharmaceutical concentrations decreased at a rate of >80% and the removal rates of the examined bacteria (Escherichia coli, Enterococci, Klebsiella sp. and Staphylococcus sp.) were >80%. Importantly, the bacteria remaining after photocatalysis were sensitive to the tested antibiotics. Conversely, the examined ARGs were present in high concentrations before and after photocatalytic treatment. For example, the concentrations of the selected genes, namely ampC, sul2, tetA and qnrA, in the effluents were from 104 to 106 gene copies L−1.CONCLUSIONSPhotocatalysis may be a promising treatment technique for the elimination of PhACs and pathogenic bacteria from HWW. Moreover, it proved capable of altering the antibiotic resistance profile of the bacteria surviving after treatment, making them sensitive to certain antibiotic compounds. However, the main concern regarding public health protection remains, as the presence of ARGs in effluents in considerable concentrations may induce antibiotic resistance in bacterial communities of aquatic environments. © 2023 Society of Chemical Industry (SCI).

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Heterogeneous photocatalysis using UVA-LEDs for the removal of antibiotics and antibiotic resistant bacteria from urban wastewater treatment plant effluents

Cited by 147 publications

References 59 publications

Photocatalytic Degradation of Ampicillin Using PLA/TiO2 Hybrid Nanofibers Coated on Different Types of Fiberglass

Photocatalytic Degradation of Ampicillin Using PLA/TiO2 Hybrid Nanofibers Coated on Different Types of Fiberglass

Recent advances on the application of UV‐LED technology for microbial inactivation: Progress and mechanism

Treatment of hospital wastewater: emphasis on ecotoxicity and antibiotic resistance genes

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