Efficient bacterial disinfection based on an integrated nanoporous titanium dioxide and ruthenium oxide bifunctional approach

Adhikari, Bal-Ram; Thind, Sapanbir S.; Chen, Shuai; Schraft, Heidi; Chen, Aicheng

doi:10.1016/j.jhazmat.2018.05.036

Cited by 16 publications

(5 citation statements)

References 51 publications

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“…The generated h

and e

can not only decompose H 2 O into O 2 and H 2 (Equations 2 and 3) (Fujishima and Honda, 1972 ), but also react with the adsorbed H 2 O and O 2 at the TiO 2 surface to generate ROS such as • OH,

, and H 2 O 2 that are potentially responsible for pollutants removal (Equations 4–9) (He et al, 2009 ). Beside this, in the co-doping of TiO 2 and RuO 2 , RuO 2 can serve as a conductor to transfer the excited e

of TiO 2 , thereby improving the separation efficiency of electron-hole pairs, and also participate in the reaction with surface adsorbed H 2 O to generate active • OH (Equation 10) (Adhikari et al, 2018 ; Li et al, 2018a ). In addition, the two-electron reduction of oxygen (Equation 11) also results in the generation of H 2 O 2 at the cathode surface.…”

Section: Resultsmentioning

confidence: 99%

Effective Removal of Sulfanilic Acid From Water Using a Low-Pressure Electrochemical RuO2-TiO2@Ti/PVDF Composite Membrane

Zheng

Yan

et al. 2018

Front. Chem.

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Removal of sulfanilic acid (SA) from water is an urgent but still challenging task. Herein, we developed a low pressure electrochemical membrane filtration (EMF) system for SA decontamination using RuO2-TiO2@Ti/PVDF composite membrane to serve as not only a filter but also an anode. Results showed that efficient removal of SA was achieved in this EMF system. At a charging voltage of 1.5 V and a electrolyte concentration of 15 mM, flow-through operation with a hydraulic retention time (HRT) of 2 h led to a high SA removal efficiency (80.4%), as expected from the improved contact reaction of this compound with ROS present at the anode surface. Cyclic voltammetry (CV) analysis indicated that the direct anodic oxidation played a minor role in SA degradation. Electron spin resonance (ESR) spectra demonstrated the production of •OH in the EMF system. Compared to the cathodic polarization, anodic generated ROS was more likely responsible for SA removal. Scavenging tests suggested that adsorbed •OH on the anode (>•OH) played a dominant role in SA degradation, while O2•- was an important intermediate oxidant which mediated the production of •OH. The calculated mineralization current efficiency (MCE) of the flow-through operated system 29.3% with this value much higher than that of the flow-by mode (5.1%). As a consequence, flow-through operation contributed to efficient oxidation of SA toward CO2 and nontoxic carboxylic acids accounting for 71.2% of initial C. These results demonstrate the potential of the EMF system to be used as an effective technology for water decontamination.

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“…The generated h

and e

can not only decompose H 2 O into O 2 and H 2 (Equations 2 and 3) (Fujishima and Honda, 1972 ), but also react with the adsorbed H 2 O and O 2 at the TiO 2 surface to generate ROS such as • OH,

Section: Resultsmentioning

confidence: 99%

Effective Removal of Sulfanilic Acid From Water Using a Low-Pressure Electrochemical RuO2-TiO2@Ti/PVDF Composite Membrane

Zheng

Yan

et al. 2018

Front. Chem.

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“…Inorganic NPs are widely used in different fields of industry. Titanium dioxide (TeO 2 ) NPs exhibit antibacterial properties [21] and used for the wastewater treatment [22] and food safety [23]. TiO 2 coated packaging materials have clear antimicrobial properties [24].…”

Section: Resultsmentioning

confidence: 99%

Development of modern nanotecnologies and combined biotoxicity problems

Batyuk

Kizilova

2022

Eureka: LS

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Fast progress in modern nanotechnologies based on use of nanoparticles, nanofibers and nanotubes with different composition, shape and size allows elaboration of materials with superhigh strength, thermal and electric conductivity, acoustical and optical properties. Those materials are already widely used in industry, transportation, aerospace, marine and civil engineering, food processing and medicine. Some examples of nanoreinforces composites, superhydrophobic self-cleaning surfaces, nanodyes and suspensions of nanoparticles are described. The problem of uncontrolled accumulation of some types of nanoparticles in our cells and tissues is discussed within the concept of nanotoxicity. Since the history of permanent observation of human health in connection with nanodust accumulation in the atmosphere, waters and soils is not enough long, the detailed evidences must be documented, systematized and discussed. In this study a brief systematic review of literature on the biotoxicity problems caused by modern nanotechnologies is given. Production of the nanoparticles, nanofibers and nanotubes for industry, transportation, food processing, as well as utilization of the used materials which properties were modified by the nanotechnologies leads to permanent rise of the nanodust in the atmosphere, soils, river waters, lakes and the sea bottom. Their uncontrolled interaction with flora and fauna could be catastrophic for human health and life on the Earth. Promising ways for the problem solution and perspectives are discussed. Some own results on the protective action of nanodiamonds, silver and some other nanoparticles are presented. A vital necessity of an open access database on known types of nanoparticles, their use in the materials and documented influence of health of animals and humans is discussed

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“…PC and its derivative technologies are considered to be promising disinfection technologies. Adhikari et al reported an efficient bacterial disinfection approach based on an integrated system containing nanoporous titanium dioxide and ruthenium oxide . Jiang et al studied the photoelectrocatalytic removal of ARB and ARGs in water systems for the first time .…”

Section: Horizontal Transfer Of Args During Various Disinfection Tech...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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Efficient bacterial disinfection based on an integrated nanoporous titanium dioxide and ruthenium oxide bifunctional approach

Cited by 16 publications

References 51 publications

Effective Removal of Sulfanilic Acid From Water Using a Low-Pressure Electrochemical RuO2-TiO2@Ti/PVDF Composite Membrane

Effective Removal of Sulfanilic Acid From Water Using a Low-Pressure Electrochemical RuO2-TiO2@Ti/PVDF Composite Membrane

Development of modern nanotecnologies and combined biotoxicity problems

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

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