Evolution of Phthalocyanine Structures as Photodynamic Agents for Bacteria Inactivation

2022 ◽  
Author(s):  
Mariana B. Spesia ◽  
Edgardo N. Durantini
Keyword(s):  
Bacteria Inactivation

scholarly journals Simultaneous Disinfection and Organic Microcontaminant Removal by UVC-LED-Driven Advanced Oxidation Processes

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1507
Author(s):  
Sara Miralles-Cuevas ◽  
Irene De la Obra ◽  
Elizabeth Gualda-Alonso ◽  
Paula Soriano-Molina ◽  
José L. Casas López ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Scaling Up ◽  
Bactericidal Effect ◽  
Secondary Effluent ◽  
Bacterial Inactivation ◽  
Bacterial Regrowth ◽  
Oxidation Processes ◽  
Bacteria Inactivation ◽  
Simulated Wastewater

This work presents the comparison of four advanced oxidation processes driven by UVC-LED radiation (278 nm—2 W/m2) for simultaneous bacteria inactivation (Escherichia coli—106 CFU/mL) and microcontaminant removal (imidacloprid—50 µg/L) in simulated wastewater secondary effluent. To this end, the activation of H2O2 and S2O82− as precursors of HO• and SO4•−, respectively, by UVC-LED and UVC-LED/Fe3+–NTA (ferric nitrilotriacetate at 0.1 mM) has been studied at different oxidant concentrations. For the purpose of comparison, conventional chlorination was used as the baseline along with bacterial regrowth 24 h after treatment. Disinfection was achieved within the first 30 min in all of the processes, mainly due to the bactericidal effect of UVC-LED radiation. UVC-LED/H2O2 did not substantially affect imidacloprid removal due to the low HO• generation by UVC irradiation at 278 nm, while more than 80% imidacloprid removal was achieved by the UVC-LED/S2O82−, UVC-LED/Fe3+–NTA/S2O82−, and UVC-LED/Fe3+–NTA/H2O2 processes. The most efficient concentration of both oxidants for the simultaneous disinfection and microcontaminant removal was 1.47 mM. Chlorination was the most effective treatment for bacterial inactivation without imidacloprid removal. These findings are relevant for scaling up UVC-LED photoreactors for tertiary wastewater treatment aimed at removing bacteria and microcontaminants.

Ozone-based water treatment (O3, O3/UV, O3/H2O2) for removal of organic micropollutants, bacteria inactivation and regrowth prevention

2021 ◽  
Vol 9 (4) ◽  
pp. 105315
Author(s):  
Ana M. Gorito ◽  
Joana F.J.R. Pesqueira ◽  
Nuno F.F. Moreira ◽  
Ana R. Ribeiro ◽  
M. Fernando R. Pereira ◽  
...  
Keyword(s):  
Water Treatment ◽  
Organic Micropollutants ◽  
Bacteria Inactivation

LLC inverter design for driving surface DBD optimized for airborne bacteria inactivation

2021 ◽  
Author(s):  
Yeong Woon Kim ◽  
Thusita Randima Wellawatta ◽  
Sung-Jin Choi ◽  
Jun Choi
Keyword(s):  
Airborne Bacteria ◽  
Bacteria Inactivation

Plasma electrolytic titanium oxide applied for pathogenic bacteria inactivation

2018 ◽  
Vol 41 (2) ◽  
pp. 141-152
Author(s):  
Carlise Hannel Ferreira ◽  
Sabrina Candido Nunes ◽  
Vidiany Aparecida Queiroz Santos ◽  
Ernesto Chaves Pereira ◽  
Mariana de Souza Sikora
Keyword(s):  
Titanium Oxide ◽  
Pathogenic Bacteria ◽  
Bacteria Inactivation ◽  
Plasma Electrolytic ◽  
Electrolytic Titanium

Ultrasonication enhanced low concentration electrolyzed water efficacy on bacteria inactivation and shelf life extension on lettuce

2013 ◽  
Vol 22 (1) ◽  
pp. 131-136 ◽  
Author(s):  
Fereidoun Forghani ◽  
S. M. E. Rahman ◽  
Myoung-Su Park ◽  
Joong-Hyun Park ◽  
Jiyong Park ◽  
...  
Keyword(s):  
Shelf Life ◽  
Life Extension ◽  
Electrolyzed Water ◽  
Low Concentration ◽  
Shelf Life Extension ◽  
Bacteria Inactivation

scholarly journals Efficient Bacteria Inactivation by Ultrasound in Municipal Wastewater

Environments ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 47 ◽  
Author(s):  
Leonel Amabilis-Sosa ◽  
Monserrat Vázquez-López ◽  
Juan Rojas ◽  
Adriana Roé-Sosa ◽  
Gabriela Moeller-Chávez
Keyword(s):  
Municipal Wastewater ◽  
Bacteria Inactivation

Fast Bacteria Inactivation of Waste Water by Gas-liquid Plasma

2021 ◽  
Author(s):  
Zhengquan Ni ◽  
Yuan Li ◽  
Jiaye Wen ◽  
Guanjun Zhang
Keyword(s):  
Waste Water ◽  
Bacteria Inactivation

β-FeOOH/Fe-TiO2 heterojunctions on Ti for bacteria inactivation under light irradiation and biosealing

2020 ◽  
Vol 8 (21) ◽  
pp. 6004-6016
Author(s):  
Kai Li ◽  
Yang Xue ◽  
Lan Zhang ◽  
Yong Han
Keyword(s):  
Light Irradiation ◽  
Infection Model ◽  
Bacteria Inactivation

Upon light irradiation, β-FeOOH/Fe-TiO2 heterojunctions efficiently eliminate bacteria and enhance the biosealing of Ti implants in an infection model.

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