scholarly journals Výskyt pesticídnych látok vo vodnom prostredí a ich odstraňovanie z pitných vôd pomocou pokročilých oxidačných procesov

Entecho ◽  
2020 ◽  
Vol 3 (1) ◽  
pp. 1-5
Author(s):  
Tamara Pacholská ◽  
Pavla Šmejkalová
Keyword(s):  
Hydrogen Peroxide ◽  
Drinking Water ◽  
Activated Carbon ◽  
Water Resources ◽  
Water Supply ◽  
Uv Radiation ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes ◽  
Intensive Use

Intenzívne používanie pesticídnych látok spôsobilo na mnohých miestach vážne problémy v ekosystéme, najmä čo sa týka vodných zdrojov, kam sa tieto látky dostávajú. Keďže klasickou vodárenskou technológiou nie je možné pesticídy z vody odstraňovať, nachádzajú sa tak tieto látky v nadlimitných koncentráciách v pitných vodách. Preto je nutné navrhnúť technológiu, ktorá bude v ich odstraňovaní účinná. Ako vhodné sa ukazujú pokročilé oxidačné procesy (AOPs) v kombinácii s granulovaným aktívnym uhlím (GAU). Cieľom tohto experimentu bolo porovnať účinok ozonizácie a pokročilých oxidačných procesov, z ktorých sa overovala kombinácia ozónu s UV žiarením (O3 + UV) a ozónu s peroxidom vodíka (O3 + H2O2) s následnou sorpciou na GAU. Abstract (en) Intensive use of pesticides has caused serious problems in the ecosystem in many places, especially in terms of the water resources to which pesticides enter. It is not possible to remove pesticides from water using conventional water supply technology, so these substances are found in above-limit concentrations in drinking water. Therefore, it is necessary to design a technology that will be effective in removing them. Advanced oxidation processes (AOPs) in combination with granular activated carbon (GAU) prove to be suitable. The aim of this experiment was to compare the effect of ozonation and advanced oxidation processes, which verified the combination of ozone with UV radiation (O3 + UV) and ozone with hydrogen peroxide (O3 + H2O2) followed by sorption on GAU.

Chemical Models of Advanced Oxidation Processes

1992 ◽  
Vol 27 (1) ◽  
pp. 23-42 ◽  
Author(s):  
William H. Glaze ◽  
Fernando Beltran ◽  
Tuula Tuhkanen ◽  
Joon-Wun Kang
Keyword(s):  
Hydrogen Peroxide ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Industrial Wastes ◽  
Organic Substances ◽  
Ultrapure Water ◽  
Radical Scavengers ◽  
Oxidation Processes ◽  
Radical Intermediates ◽  
Chemical Models

Abstract Advanced oxidation processes (AOPs) have been defined as near-ambient temperature processes that involve the generation of highly reactive radical intermediates, especially the hydroxyl radical. These processes show promise for the destruction of hazardous organic substances in municipal and industrial wastes, in drinking water and in ultrapure water. Three types of AOPs are considered in this paper: catalyzed decomposition of ozone; ozone with hydrogen peroxide (Peroxone); and photolysis of hydrogen peroxide with ultraviolet radiation. Kinetic models for these processes are being developed based on known chemical and photochemical principles. The models take into account measured effects of radical scavengers such as bicarbonate; dose ratios of the oxidants or UV intensity; pH; and the presence of generic radical scavengers. The models are used to discuss two cases: oxidation of parts-per-million levels of nitrobenzene with ozone, Peroxone and peroxide/UV and oxidation of naphthalene and pentachlorophenol with peroxide/UV.

scholarly journals Removal Of Phenol From Wastewater By Using Low-Cost Catalyst From Metal Production

2014 ◽  
Vol 22 (341) ◽  
pp. 55-59
Author(s):  
Blanka Galbičková ◽  
Maroš Soldán ◽  
Michal Belčík ◽  
Karol Balog
Keyword(s):  
Uv Radiation ◽  
Red Mud ◽  
Advanced Oxidation Processes ◽  
Low Cost ◽  
Advanced Oxidation ◽  
Emerging Technology ◽  
Mercury Lamp ◽  
Metal Production ◽  
Oxidation Processes ◽  
Uv Photodegradation

Abstract Utilization of AOPs (Advanced oxidation processes) as an emerging technology for removing of pollutants from wastewater is developed. In this paper, UV photodegradation was used for removing of phenol from wastewater. As a source of UV radiation medium pressure mercury lamp with output 400W was used. The influence of low-cost catalysts on this process was also monitored. Wastes from metal production, red mud and black nickel mud, were used as catalysts.

scholarly journals Comparison of Landfill Leachate Treatment Efficiency Using the Advanced Oxidation Processes

2013 ◽  
Vol 39 (2) ◽  
pp. 107-115 ◽  
Author(s):  
Barbara Pieczykolan ◽  
Izabela Płonka ◽  
Krzysztof Barbusiński ◽  
Magdalena Amalio-Kosel
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Compounds ◽  
Advanced Oxidation Processes ◽  
Potassium Dichromate ◽  
Advanced Oxidation ◽  
Fenton’S Reagent ◽  
Nitrogen And Phosphorus ◽  
Leachate Treatment ◽  
Fenton's Reagent ◽  
Oxidation Processes

Abstract Treatment of leachate from an exploited since 2004 landfill by using two methods of advanced oxidation processes was performed. Fenton’s reagent with two different doses of hydrogen peroxide and iron and UV/H2O2 process was applied. The removal efficiency of biochemically oxidizable organic compounds (BOD5), chemically oxidizable compounds using potassium dichromate (CODCr) and nutrient (nitrogen and phosphorus) was examined. Studies have shown that the greatest degree of organic compounds removal expressed as a BOD5 index and CODCr index were obtained when Fenton’s reagent with greater dose of hydrogen peroxide was used - efficiency was respectively 72.0% and 69.8%. Moreover, in this case there was observed an increase in the value of ratio of BOD5/CODCr in treated leachate in comparison with raw leachate. Application of Fenton’s reagent for leachate treatment also allowed for more effective removal of nutrients in comparison with the UV/H2O2 process.

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