scholarly journals Application of ozone ultrafine bubble water for cleaning and sterilizing the dialysis circuit

2018 ◽  
Vol 192 ◽  
pp. 03034
Author(s):  
Yukiko Nakahara ◽  
Kazutoku Miyazaki ◽  
Junji Nakao ◽  
Shijie Zhu
Keyword(s):  
Aqueous Solution ◽  
Sodium Hypochlorite ◽  
Ozone Concentration ◽  
Bactericidal Effect ◽  
Water Influence

The dialysis circuit was washed by the ultrafine bubble (UFB) water and ozone UFB water and sodium hypochlorite aqueous solution. The effect of washing time, ozone concentration of UFB water, influence of UFB water on artificial dialysis equipment, etc. were investigated. The cleaning and sterilizing effect of ozone UFB water passed through the filter for artificial dialysis was verified. It was confirmed that there were no colony bacteria in the circuit which was washed by the ozone UFB water for 1 hour. Ozone UFB water has the same bactericidal effect as sodium hypochlorite. As an alternative of sodium hypochlorite, we are expecting its application to the cleaning and sterilization of ozone UFB water for dialysis circuit.

scholarly journals Preliminary Study on the Use of Ozonation for the Degradation of Dithiocarbamate Residues in the Fruit Drying Process: Mancozeb Residue in Blackcurrant is the Example Used

2013 ◽  
Vol 53 (1) ◽  
pp. 48-52 ◽  
Author(s):  
Piotr Antos ◽  
Anna Kurdziel ◽  
Stanisław Sadło ◽  
Maciej Balawejder
Keyword(s):  
Aqueous Solution ◽  
Ozone Concentration ◽  
Gaseous Phase ◽  
Plant Material ◽  
Water Solution ◽  
Ozone Treatment ◽  
Drying Process ◽  
Initial Concentration ◽  
Preliminary Study ◽  
Treatment Procedures

Abstract In order to reduce the level of dithiocarbamate fungicide mancozeb residues in blackcurrants, two different ozone treatment procedures were evaluated. The first one entailed washing the plant material with an aqueous solution of ozone. This ozone enriched water solution allowed for a 59% reduction of mancozeb residues, compared with the initial concentration. The latter method was based on the utilization of ozone in a gaseous phase combined with a drying process. In that procedure, samples of blackcurrant fruit were exposed to a 19 ppm ozone concentration, and then the blackcurrants were dried. The utilization of ozone in a gaseous phase permitted a 38% reduction of mancozeb residues, in comparison with the initial concentration. As a result of the combination of both processes; ozonation and drying, a 58% reduction of mancozeb residues was achieved.

Prometryne Oxidation by Sodium Hypochlorite in Aqueous Solution: Kinetics and Mechanism

1995 ◽  
Vol 29 (12) ◽  
pp. 2987-2991 ◽  
Author(s):  
G. Mascolo ◽  
A. Lopez ◽  
R. Foldenyi ◽  
R. Passino ◽  
G. Tiravanti
Keyword(s):  
Aqueous Solution ◽  
Sodium Hypochlorite ◽  
Kinetics And Mechanism ◽  
Solution Kinetics

Degradation of Aqueous 4-Chloroaniline by Ozonolysis and Combined γ-Rays-Ozone Processing

2002 ◽  
Vol 57 (11-12) ◽  
pp. 1047-1050
Author(s):  
Mónica Sánchez ◽  
Nikola Getoff ◽  
Laszlo Sümegi ◽  
Robert Zona
Keyword(s):  
Aqueous Solution ◽  
Carboxylic Acids ◽  
Absorption Spectroscopy ◽  
Ozone Concentration ◽  
Degradation Process ◽  
Hplc Method ◽  
Prolonged Treatment ◽  
Primary Reaction ◽  
Γ Irradiation ◽  
Γ Rays

The decomposition of 4-chloroaniline (4-ClA), used as a model for water pollutants, was studied by ozonolysis as well as by γ-rays in the presence of ozone under comparable conditions. The degradation process was followed by absorption spectroscopy and by HPLC-method as well. Depending on the ozone concentration (mg O3/min) introduced into the aqueous solution the substrate is decomposed to a mixture of carboxylic acids, which can be entirely degradated by prolonged treatment. The combined processing of 4-ClA by γ-irradiation in the presence of ozone proved to lead even to more efficient degradation of the substrate. Some primary reaction steps are briefly discussed.

Photooxidation Degradation of Reactive Brilliant Red K-2BP in Aqueous Solution by Ultraviolet Radiation/Sodium Hypochlorite

2009 ◽  
Vol 37 (7) ◽  
pp. 574-580 ◽  
Author(s):  
Qing-Fu Zeng ◽  
Jie Fu ◽  
Yang Zhou ◽  
Yin-Tao Shi ◽  
Hai-Liang Zhu
Keyword(s):  
Aqueous Solution ◽  
Ultraviolet Radiation ◽  
Sodium Hypochlorite

scholarly journals The Bactericidal Effect of a Combination of Food-Grade Compounds and their Application as Alternative Antibacterial Agents for Food Contact Surfaces

Foods ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 59 ◽  
Author(s):  
Kyung Min Park ◽  
Sung-Geon Yoon ◽  
Tae-Ho Choi ◽  
Hyun Jung Kim ◽  
Kee Jai Park ◽  
...  
Keyword(s):  
Sodium Hypochlorite ◽  
Salmonella Enteritidis ◽  
Antibacterial Agents ◽  
Multicomponent System ◽  
Viable Cell ◽  
Bactericidal Effect ◽  
Food Grade ◽  
Food Contact ◽  
Food Contact Surfaces ◽  
Contact Surfaces

Chemical antibacterials are widely used to control microbial growth but have raised concerns about health risks. It is necessary to find alternative, non-toxic antibacterial agents for the inhibition of pathogens in foods or food contact surfaces. To develop a non-toxic and “green” food-grade alternative to chemical sanitizers, we formulated a multicomponent antibacterial mixture containing Rosmarinus officinalis L., Camellia sinensis L., citric acid, and ε-polylysine and evaluated its bactericidal efficacy against Staphylococcus aureus, Escherichia coli, Bacillus cereus, Salmonella Enteritidis, and Listeria monocytogenes on food contact surfaces. A combination of the agents allowed their use at levels lower than were effective when tested individually. At a concentration of 0.25%, the multicomponent mixture reduced viable cell count by more than 5 log CFU/area, with complete inactivation 24 h after treatment. The inhibitory efficacy of the chemical antibacterial agent (sodium hypochlorite, 200 ppm) and the multicomponent antibacterial mixture (0.25%) on utensil surfaces against S. aureus, E. coli, S. Enteritidis, and L. monocytogenes were similar, but the multicomponent system was more effective against B. cereus than sodium hypochlorite, with an immediate 99.999% reduction on knife and plastic basket surfaces, respectively, and within 2 h on cutting board surfaces after treatment. A combination of these food-grade antibacterials could be a useful strategy for inhibition of bacteria on food contact surfaces while allowing use of lower concentrations of its components than are effective individually. This multicomponent food-grade antibacterial mixture may be a suitable “green” alternative to chemical sanitizers.

Degradation of herbicides (ametryn and isoproturon) during water disinfection by means of two oxidants (hypochlorite and chlorine dioxide)

1997 ◽  
Vol 35 (4) ◽  
pp. 129-136 ◽  
Author(s):  
A. Lopez ◽  
G. Mascolo ◽  
G. Tiravanti ◽  
R. Passino
Keyword(s):  
Aqueous Solution ◽  
Reaction Time ◽  
Sodium Hypochlorite ◽  
Chlorine Dioxide ◽  
Hydrolysis Product ◽  
Water Disinfection ◽  
Experimental Conditions ◽  
Molar Ratios ◽  
Chemical Structures ◽  
Opposite Trend

The paper reports the results of an investigation aimed to find out the number and the chemical structures of byproducts which form during the reactions occurring in aqueous solution between two very common disinfectants, sodium hypochlorite (NaClO) and chlorine dioxide (ClO2), and two herbicides widely used in agriculture and frequently found in groundwaters: ametryn and isoproturon. Under controlled experimental conditions [T=20°C, pH=7, reaction-time = 48h, herbicide/disinfectant molar ratios: 0.05 and 0.05×10−2], ametryn reactions with chlorine dioxide much slower than with sodium hypochlorite, whereas the opposite trend has been observed for isoproturon. In any case, however, the higher the reagents concentration the faster the reactions. As for reaction byproducts, they have been detected by HPLC and identified by HPLC-MS. In particular, ametryn (R-S-CH3) reaction with NaClO gives rise to the consecutive formation of four derivatives: the sulphoxide (R-SO-CH3), the sulphone (R-SO2-CH3), the sulphonate ester (R-O-SO2-CH3) and its hydrolysis product (R-OH). Within the fixed reaction time (48h), ametryn reaction with ClO2 forms only the sulphoxide derivative (R-SO-CH3). As for isoproturon, it reacts with both oxidants forming aromatic-ring substituted derivatives. In particular, during the reactions with NaClO and ClO2, four and two (chlorinated and/or hydroxylated) derivatives are respectively formed.

scholarly journals Study on Decoloring of Indigo by Sodium Hypochlorite Aqueous Solution

2018 ◽  
Vol 91 (7) ◽  
pp. 215-219
Author(s):  
Hitoshi IWABUKI ◽  
Yuko MATSUMOTO ◽  
Hiromi URANO
Keyword(s):  
Aqueous Solution ◽  
Sodium Hypochlorite
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