Destruction of trichloroethylene by UV light-catalyzed oxidation with hydrogen peroxide

Abstract This project investigated the destruction of organic compounds and microorganisms in water by ultraviolet catalyzed oxidation using hydrogen peroxide as the oxidizing agent. The combination of UV light and hydrogen peroxide was effective in decomposing all of the organic compounds studied. The rates of destruction increased with increasing peroxide concentration and UV light intensity, and were highly dependent on chemical structure. The destruction of mixtures of organic compounds showed strong interactions between reacting components. The inactivation of E. coli and B. subtilis spores by UV light and/or hydrogen peroxide was studied in flat plate reactors. By using thin liquid films, the combination of UV light and peroxide greatly increased the rates of inactivation of both microorganisms. The results were correlated by a mixed second order kinetic model.

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Destruction of aromatic pollutants by UV light catalyzed oxidation with hydrogen peroxide

Environmental Progress ◽

10.1002/ep.3300080107 ◽

1989 ◽

Vol 8 (1) ◽

pp. 6-11 ◽

Cited By ~ 102

Author(s):

D. W. Sundstrom ◽

B. A. Weir ◽

H. E. Klei

Keyword(s):

Hydrogen Peroxide ◽

Uv Light ◽

Aromatic Pollutants ◽

Catalyzed Oxidation

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Oxidation of Palm Oil Mill Effluent Using Hydrogen Peroxide and Catalysed by UV Light/Zinc Oxide

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/736/4/042025 ◽

2020 ◽

Vol 736 ◽

pp. 042025

Author(s):

Augustine Chioma Affam ◽

Abdul Rahman Bin Bistar

Keyword(s):

Hydrogen Peroxide ◽

Zinc Oxide ◽

Palm Oil ◽

Uv Light ◽

Palm Oil Mill Effluent ◽

Palm Oil Mill

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The Use of Sodium Carbonate—Hydrogen Peroxide (2/3) in the Modified Fenton Reaction to Degradation PAHs in Coke Wastewater

Proceedings ◽

10.3390/proceedings2019016044 ◽

2019 ◽

Vol 16 (1) ◽

pp. 44

Author(s):

Kozak ◽

Włodarczyk-Makuła

Keyword(s):

Hydrogen Peroxide ◽

Organic Pollutants ◽

Sodium Carbonate ◽

Uv Light ◽

Oxygen Demand ◽

Organic Matrix ◽

Coke Wastewater ◽

Polycyclic Aromatic ◽

Pahs Concentration ◽

Modified Fenton

The aim of the research was to determine the effectiveness of removing micro-organic pollutants, including PAHs, using the modified Fenton method. The tested material was pretreated coke wastewater, in which the initial chemical oxygen demand (COD) value and initial polycyclic aromatic hydrocarbons (PAHs) concentration were determined. The samples were then subjected to an oxidation procedure. Before the process, the pH was adjusted to 3.5–3.8. Next, the following doses of sodium carbonate—hydrogen peroxide (2/3): 1.2 g/L, 1.5 g/L and 2 g/L, and a constant dose of iron sulphate were added. The next step was exposing the samples to UV light for 6 min and separating the organic matrix from the samples of wastewater. After the tests, the final value of the COD and the final PAHs concentration were determined. The average content of organic pollutants in pretreated coke wastewater determined by the COD index was 538 mg/L, and after the oxidation process, the COD index decreased in the range from 9 to 29%. The efficiency of the degradation of the sum of 16 PAHs was varied and was in the range of 94–97.6%. The research results show that sodium carbonate—hydrogen peroxide (2/3) can be used for the degradation of organic pollutants, such as PAHs, in the modified Fenton process.

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Sanitization of Chicken Frames by a Combination of Hydrogen Peroxide and UV Light To Reduce Contamination of Derived Edible Products

Journal of Food Protection ◽

10.4315/0362-028x.jfp-19-175 ◽

2019 ◽

Vol 82 (11) ◽

pp. 1896-1900

Author(s):

A. M. JONES-IBARRA ◽

C. Z. ALVARADO ◽

CRAIG D. COUFAL ◽

T. MATTHEW TAYLOR

Keyword(s):

Hydrogen Peroxide ◽

Salmonella Enterica ◽

Advanced Oxidation Process ◽

Uv Light ◽

Disease Outbreaks ◽

Aerobic Bacteria ◽

Chicken Carcass ◽

Serovar Typhimurium ◽

Uv C ◽

Water Rinse

ABSTRACT Chicken carcass frames are used to obtain mechanically separated chicken (MSC) for use in other further processed food products. Previous foodborne disease outbreaks involving Salmonella-contaminated MSC have demonstrated the potential for the human pathogen to be transmitted to consumers via MSC. The current study evaluated the efficacy of multiple treatments applied to the surfaces of chicken carcass frames to reduce microbial loads on noninoculated frames and frames inoculated with a cocktail of Salmonella enterica serovar Enteritidis and Salmonella enterica serovar Typhimurium. Inoculated or noninoculated frames were left untreated (control) or were subjected to treatment using a prototype sanitization apparatus. Treatments consisted of (i) a sterile water rinse, (ii) a water rinse followed by 5 s of UV-C light application, or (iii) an advanced oxidation process (AOP) combining 5 or 7% (v/v) hydrogen peroxide (H2O2) with UV-C light. Treatment with 7% H2O2 and UV-C light reduced numbers of aerobic bacteria by up to 1.5 log CFU per frame (P < 0.05); reductions in aerobic bacteria subjected to other treatments did not statistically differ from one another (initial mean load on nontreated frames: 3.6 ± 0.1 log CFU per frame). Salmonella numbers (mean load on inoculated, nontreated control was 5.6 ± 0.2 log CFU per frame) were maximally reduced by AOP application in comparison with other treatments. No difference in Salmonella reductions obtained by 5% H2O2 (1.1 log CFU per frame) was detected compared with that obtained following 7% H2O2 use (1.0 log CFU per frame). The AOP treatment for sanitization of chicken carcass frames reduces microbial contamination on chicken carcass frames that are subsequently used for manufacture of MSC.

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Metal-catalyzed oxidation renders silver intensification selective. Applications for the histochemistry of diaminobenzidine and neurofibrillary changes.

Journal of Histochemistry & Cytochemistry ◽

10.1177/34.12.3537114 ◽

1986 ◽

Vol 34 (12) ◽

pp. 1667-1672 ◽

Cited By ~ 54

Author(s):

F Gallyas ◽

J R Wolff

Keyword(s):

Hydrogen Peroxide ◽

Oxidative Polymerization ◽

Silver Coating ◽

Neurofibrillary Changes ◽

Iodide Ions ◽

Tissue Sections ◽

Metal Catalyzed Oxidation ◽

Pre Treatment ◽

Metal Catalyzed ◽

Catalyzed Oxidation

Physical developers can increase the visibility of end products of certain histochemical reactions, such as oxidative polymerization of diaminobenzidine and selective binding of complex silver iodide ions to Alzheimer's neurofibrillary changes. Unfortunately, this intensification by silver coating is generally superimposed on a nonspecific staining originating from the argyrophil III reaction, which also takes place when tissue sections are treated with physical developers. The present study reveals that the argyrophil III reaction can be suppressed when tissue sections are treated with certain metal ions and hydrogen peroxide before they are transferred to the physical developer. The selective intensification of Alzheimer's neurofibrillary changes requires a pre-treatment with lanthanum nitrate (10 mM/liter) and 3% hydrogen peroxide for 1 hr. The diaminobenzidine reaction can be selectively intensified when physical development is preceded by consecutive treatments with copper sulfate (10 mM/liter, pH 5, 10 min) and hydrogen peroxide (3%, pH 7, 10 min). In peroxidase histochemistry, this high-grade intensification may help to increase specificity and reduce the threshold of detectability in tracing neurons with horseradish peroxidase or in immunohistochemistry when the peroxidase-antiperoxidase method is used.

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