scholarly journals TiO2 Application for the Photocatalytical Inactivation of S. enterica, E. coli and M. luteus Bacteria Mixtures

2020 ◽  
Vol 24 (3) ◽  
pp. 418-429
Author(s):  
Neringa Kuliesiene ◽  
Sandra Sakalauskaite ◽  
Simona Tuckute ◽  
Marius Urbonavicius ◽  
Sarunas Varnagiris ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Treatment Time ◽  
Bacterial Pathogens ◽  
Advanced Oxidation ◽  
Gram Positive ◽  
Efficient Treatment ◽  
Gram Negative ◽  
Oxidation Processes ◽  
Photocatalytic Disinfection ◽  
The Impact

AbstractWater contamination by various bacteria, viruses and other pathogens is a great threat to human health. Amongst other Advanced Oxidation Processes TiO2 photocatalysis is considered as one of the most efficient treatment for the polluted wastewater disinfection. Usually, the wastewater produced by higher risk objects, such as hospitals, implicates diverse contaminants, but efficiency of most of the Advanced Oxidation Processes is tested by using only single pathogens and information on inactivation of bacteria mixtures is still limited. In this study, photocatalytical inactivation of three commonly found bacterial pathogens (gram-positive (Micrococcus luteus) and gram-negative (Salmonella enterica, Escherichia coli)) was investigated. Efficiency of traditional photocatalytic disinfection process using single bacterial pathogens was compared to the one observed for their mixtures. The impact of photocatalytical process parameters and treatment time on bacteria disinfection efficiency was studied. Photocatalytic disinfection efficiency testing with bacteria mixtures revealed, that in the presence of TiO2 photocatalyst and UV irradiation tested gram-positive cells were inactivated slower than gram-negative cells. Another important finding was that an overall photocatalytic disinfection efficiency of bacteria mixtures is not a straight forward sum of inactivation rates of individually tested pathogens but has a strong relationship to the properties of their competitive growth.

The impact of H 2 O 2 and the role of mineralization in biodegradation or ecotoxicity assessment of advanced oxidation processes

2018 ◽  
Vol 144 ◽  
pp. 361-366 ◽  
Author(s):  
Gyuri Sági ◽  
Anikó Bezsenyi ◽  
Krisztina Kovács ◽  
Szandra Klátyik ◽  
Béla Darvas ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes ◽  
The Impact

scholarly journals Advanced Oxidation Processes and Biotechnological Alternatives for the Treatment of Tannery Wastewater

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3222
Author(s):  
Néstor Andrés Urbina-Suarez ◽  
Fiderman Machuca-Martínez ◽  
Andrés F. Barajas-Solano
Keyword(s):  
Advanced Oxidation Processes ◽  
Liquid Waste ◽  
Value Added ◽  
Advanced Oxidation ◽  
Tannery Wastewater ◽  
Economic Sectors ◽  
Oxidation Processes ◽  
Physicochemical Composition ◽  
The Impact ◽  
Alternative Solutions

The tannery industry is one of the economic sectors that contributes to the development of different countries. Globally, Europe and Asia are the main producers of this industry, although Latin America and Africa have been growing considerably in recent years. With this growth, the negative environmental impacts towards different ecosystem resources as a result of the discharges of recalcitrated pollutants, have led to different investigations to generate alternative solutions. Worldwide, different technologies have been studied to address this problem, biological and physicochemical processes have been widely studied, presenting drawbacks with some recalcitrant compounds. This review provides a context on the different existing technologies for the treatment of tannery wastewater, analyzing the physicochemical composition of this liquid waste, the impact it generates on human health and ecosystems and the advances in the different existing technologies, focusing on advanced oxidation processes and the use of microalgae. The coupling of advanced oxidation processes with biological processes, mainly microalgae, is seen as a viable biotechnological strategy, not only for the removal of pollutants, but also to obtain value-added products with potential use in the biorefining of the biomass.

The impact of background organic matter and alkalinity on the degradation of the pesticide metaldehyde by two advanced oxidation processes: UV/H2O2 and UV/TiO2

2013 ◽  
Vol 47 (6) ◽  
pp. 2041-2049 ◽  
Author(s):  
Olivier Autin ◽  
Julie Hart ◽  
Peter Jarvis ◽  
Jitka MacAdam ◽  
Simon A. Parsons ◽  
...  
Keyword(s):  
Organic Matter ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes ◽  
The Impact

Pilot scale testing of advanced oxidation processes for degradation of geosmin and MIB in recirculated aquaculture

2010 ◽  
Vol 10 (2) ◽  
pp. 217-225 ◽  
Author(s):  
M. M. Klausen ◽  
O. Grønborg
Keyword(s):  
Advanced Oxidation Processes ◽  
Negative Impact ◽  
Tap Water ◽  
Advanced Oxidation ◽  
Pilot Scale ◽  
Oxidation Processes ◽  
Water Matrix ◽  
Degradation Rates ◽  
Increased Risk ◽  
The Impact

The presence of geosmin and 2-methylisoborneol (MIB) in recirculated aquaculture systems has a significant negative impact on the fish production due to poor flavour quality of produced fish and increased risk of rejection by fish processers. Advanced Oxidation Processes has a high potential for removal of geosmin and MIB in water and in this study UV/H2O2 and UV/O3 has been tested in pilot scale in real aquaculture process water. First order degradations constants were between 0.6 (UV/O3) and 1.2 (UV/H2O2) h−1 for geosmin and 1.3 (UV/O3)–1.5 (UV/H2O2) h−1 for MIB. This corresponded to average half-lives between 34–69 minutes for geosmin and between 28–32 minutes for MIB. These values were one order of magnitude higher than previously reported for degradation of geosmin and MIB in demineralised and tap-water. The slower degradation rates were caused by competitive and inhibitive processes from the water matrix. The influence of the water matrix also caused increased energy consumption with EEO values 16 to 38 times higher than previously reported for geosmin and MIB removal in tap water. Improved feasibility of removing geosmin and MIB in recirculated aquaculture systems by AOPs requires pre-treatment to minimize the impact of the water matrix on the degradation kinetics.

scholarly journals A Review of Manganese(III) (Oxyhydr)Oxides Use in Advanced Oxidation Processes

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 5748
Author(s):  
Daqing Jia ◽  
Khalil Hanna ◽  
Gilles Mailhot ◽  
Marcello Brigante
Keyword(s):  
Singlet Oxygen ◽  
Advanced Oxidation Processes ◽  
Inorganic Ions ◽  
Advanced Oxidation ◽  
Solution Ph ◽  
Oxidation Processes ◽  
Treatment Processes ◽  
Activation Mechanisms ◽  
The Impact

The key role of trivalent manganese (Mn(III)) species in promoting sulfate radical-based advanced oxidation processes (SR-AOPs) has recently attracted increasing attention. This review provides a comprehensive summary of Mn(III) (oxyhydr)oxide-based catalysts used to activate peroxymonosulfate (PMS) and peroxydisulfate (PDS) in water. The crystal structures of different Mn(III) (oxyhydr)oxides (such as α-Mn2O3, γ-MnOOH, and Mn3O4) are first introduced. Then the impact of the catalyst structure and composition on the activation mechanisms are discussed, as well as the effects of solution pH and inorganic ions. In the Mn(III) (oxyhydr)oxide activated SR-AOPs systems, the activation mechanisms of PMS and PDS are different. For example, both radical (such as sulfate and hydroxyl radical) and non-radical (singlet oxygen) were generated by Mn(III) (oxyhydr)oxide activated PMS. In comparison, the activation of PDS by α-Mn2O3 and γ-MnOOH preferred to form the singlet oxygen and catalyst surface activated complex to remove the organic pollutants. Finally, research gaps are discussed to suggest future directions in context of applying radical-based advanced oxidation in wastewater treatment processes.

Advanced treatment of dyehouse effluents by Fe(II) and Mn(II)-catalyzed ozonation and the H2O2/O3 process

2000 ◽  
Vol 42 (1-2) ◽  
pp. 13-18 ◽  
Author(s):  
I. Arslan ◽  
I. Akmehmet Balcioglu ◽  
T. Tuhkanen
Keyword(s):  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Advanced Oxidation Processes ◽  
Treatment Time ◽  
Effective Means ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Oxidation Products ◽  
Advanced Treatment ◽  
Oxidation Processes

Treatment of synthetic dyehouse effluent containing six reactive dyestuffs and their assisting chemicals by O3/Fe(II), O3/Mn(II), and O3/H2O2 advanced oxidation processes was investigated. All oxidation processes were capable of completely decolourizing the wastewater within 30 min. Decolourization proceeded fastest by the O3/Mn(II) process, whereas the O3/H2O2 combination was more efficient in the removal of DOC (Dissolved Organic carbon) and UV254nm which were 11 and 53%, respectively, for one hour treatment time. Application of Fe(II)-catalyzed ozonation provided an effective means of removing colour and COD (Chemical Oxygen Demand) by a five- and nine-fold enhancement, respectively, compared with conventional coagulation applied at the same coagulant doses. Formation of toxic oxidation products was not observed during the course of treatment with all investigated advanced oxidation processes.

Application of bioassay panel for assessing the impact of advanced oxidation processes on the treatment of reverse osmosis brine

2014 ◽  
Vol 89 (8) ◽  
pp. 1168-1174 ◽  
Author(s):  
Ana Justo ◽  
Óscar González ◽  
Jaume Aceña ◽  
Luigi Mita ◽  
Marta Casado ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes ◽  
The Impact
Sign in / Sign up

Export Citation Format

Share Document