Advanced oxidation processes for water disinfection: Features, mechanisms and prospects

Chen, Yidi; Duan, Xiaoguang; Zhou, Xu; Wang, Rupeng; Wang, Shaobin; Ren, Nanqi; Ho, Shih‐Hsin

doi:10.1016/j.cej.2020.128207

Cited by 189 publications

(70 citation statements)

References 214 publications

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“…Besides chlorination, ozonation is another common sewage disinfection technology. − Ozone (O 3 ) is a powerful oxidant that acts against a variety of microorganisms. It does, however, produce DBPs during water disinfection. , The inactivation mechanism of ozonation for bacteria mainly involves O 3 attacking the cell wall and causing its cleavage.…”

Section: Advances In Water Disinfection Technologies In Removing Arb ...mentioning

confidence: 99%

Traditional and Emerging Water Disinfection Technologies Challenging the Control of Antibiotic-Resistant Bacteria and Antibiotic Resistance Genes

Cai

Sun

et al. 2021

ACS EST Eng.

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The emergence of antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs) in the environment has created obstacles when treating infectious diseases with antibiotics. Wastewater treatment plants (WWTPs) serve as reservoirs for ARB and ARGs and can disseminate them into the environment. It is important to understand and address these risks. Generally, professional disinfection processes have been used in WWTPs to disinfect the target water body, with the goal of eliminating pathogenic microorganisms in the water. However, ARGs are not generally considered, and antibiotic resistance has spread and developed through horizontal gene transfer (HGT). This Review provides a detailed overview of the application progress of different traditional and new disinfection technologies in removing ARB and ARGs, mainly focusing on the bacterial inactivation mechanisms of chlorination, ozonation, ultraviolet (UV) (including UVA, UVB, and UVC), sunlight, sunlight-dissolved organic matter (DOM), and photocatalysis (PC)/photoelectrocatalysis (PEC). In addition, this Review also focuses on the disinfection technology involved in the transfer of ARGs and clarifies the underlying transfer mechanisms in water environments. Furthermore, by linking the mechanisms of bacterial inactivation, the Review describes how SOS response and cell membrane permeability may be the key step in the conjugation, transformation, and transduction of ARGs. Finally, given the applications and current problems associated with traditional water disinfection technologies and light-based disinfection technologies in removing and controlling ARB and ARGs, this Review describes the current challenges and opportunities to facilitate the development of future disinfection technologies. The Review also highlights future research directions related to ARG transmission control.

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Section: Advances In Water Disinfection Technologies In Removing Arb ...mentioning

confidence: 99%

Traditional and Emerging Water Disinfection Technologies Challenging the Control of Antibiotic-Resistant Bacteria and Antibiotic Resistance Genes

Cai

Sun

et al. 2021

ACS EST Eng.

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“…In addition to SO 4 · – and HO · , · O 2 – may participate in the catalytic process. The CMs could activate PMS to produce · O 2 – by eqs – for the degradation of organic pollutants . The production of · O 2 – by the activation of PDS has a similar electronic conduction mechanism but with a distinct pathway (eqs and )).…”

Section: Mechanistic Understanding Of the Cms/ps Systemmentioning

confidence: 99%

Structure–Function Correlations of Carbonaceous Materials for Persulfate-Based Advanced Oxidation

Zhao

Wang

2021

Langmuir

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Carbonaceous materials (CMs), as high-efficiency activators in a persulfatebased advanced oxidation process (PS-AOP), are attracting increasing attention for environmental remediation due to their high efficiency, low toxicity, and environmental friendliness. The correlations between the structural and surface properties of carbonaceous materials and the catalytic reaction efficiency in PS-AOP have been focused on experimentally and theoretically. In this Perspective, we discuss the effect of the microstructure of carbonaceous materials on the catalytic reaction efficiency, which can depend on the reaction pathways, including adsorption, free-radical routines, and non-free-radical pathways. Various features of carbonaceous materials, covering the dimensionality, pristine carbon configuration, crystallinity, defects, porosity, chemically active groups, and heterogeneous doping, can be involved. Those characteristics mainly affect the electronic process and mass transfer during the whole PS-AOP. An important target in the field is how to rationally regulate the intrinsic properties of carbonaceous substances to control both the reaction pathways and catalytic efficiency. Therefore, we conclude with a critical discussion and presentation of future challenges.

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“…Concerns surrounding these bacteria are fairly high, because several studies have revealed that they are usually present in wastewater treatment plants [7,8]. Therefore, the development of alternative water disinfection methods such as advanced oxidation process (AOP) has a huge interest [9,10]. AOPs are characterised by the in-situ generation of reactive oxygen species (ROS), especially superoxide anion (•O 2 − ) and hydroxyl radicals (•OH) which act as powerful oxidising agents capable of decomposing various organic compounds [2].…”

Section: Introductionmentioning

confidence: 99%

Floating Carbon-Doped TiO2 Photocatalyst with Metallic Underlayers Investigation for Polluted Water Treatment under Visible-Light Irradiation

et al. 2021

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In the current study, we analysed the influence of metallic underlayers on carbon-doped TiO2 films for RhB decomposition and Salmonella typhimurium inactivation under visible-light irradiation. All the experiments were divided into two parts. First, layered M/C-doped-TiO2 film structures (M = Ni, Nb, Cu) were prepared by magnetron sputtering technique on borosilicate glass substrates in the two-step deposition process. The influence of metal underlayer on the formation of the carbon-doped TiO2 films was characterised by X-ray diffractometer, scanning electron microscope, and atomic force microscope. The comparison between the visible-light assisted photocatalytic activity of M/C-doped TiO2 structures was performed by the photocatalytic bleaching tests of Rhodamine B dye aqueous solution. The best photocatalytic performance was observed for Ni/C-doped-TiO2 film combination. During the second part of the study, the Ni/C-doped-TiO2 film combination was deposited on high-density polyethylene beads which were selected as a floating substrate. The morphology and surface chemical analyses of the floating photocatalyst were performed. The viability and membrane permeability of Salmonella typhimurium were tested in cycling experiments under UV-B and visible-light irradiation. Three consecutive photocatalytic treatments of fresh bacteria suspensions with the same set of floating photocatalyst showed promising results, as after the third 1 h-long treatment bacteria viability was still reduced by 90% and 50% for UV-B and visible-light irradiation, respectively. The membrane permeability and ethidium fluorescence results suggest that Ni underlayer might have direct and indirect effect on the bacteria inactivation process. Additionally, relatively low loss of the photocatalyst efficiency suggests that floating C-doped TiO2 photocatalyst with the Ni underlayer might be seen as the possible solution for the used photocatalyst recovery issue.

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Advanced oxidation processes for water disinfection: Features, mechanisms and prospects

Cited by 189 publications

References 214 publications

Traditional and Emerging Water Disinfection Technologies Challenging the Control of Antibiotic-Resistant Bacteria and Antibiotic Resistance Genes

Traditional and Emerging Water Disinfection Technologies Challenging the Control of Antibiotic-Resistant Bacteria and Antibiotic Resistance Genes

Structure–Function Correlations of Carbonaceous Materials for Persulfate-Based Advanced Oxidation

Floating Carbon-Doped TiO2 Photocatalyst with Metallic Underlayers Investigation for Polluted Water Treatment under Visible-Light Irradiation

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