Displaying 1 - 10 of 69 in Advanced oxidation processes (remove filter)
CEST Proceedings are published under the ISSN 2944-9820.
FENTON REAGENT IN COMBINATION WITH UV LIGHT AND ULTRASOUND WAVES APPLIED FOR CAFFEINE OXIDATION
Villota N., Lomas J., Lombraña J., Ferreiro C.
Topic:
Advanced oxidation processes
The oxidation of aqueous caffeine solutions ([Ca]0=100.0 mg L-1) was analyzed, operating at pH=3.0 and 25ºC using different AOPs, which combine the Fenton reagent ([H2O2]0=15.0 mM and [Fe2+]0=20.0 mg L-1) with low power UV light (15W,), medium (150W), and high (720 W). The Fenton reagent, combined...Read more
US/H2O2 combined technology applied to the paracetamol oxidation
Villota N., (Corresponding) Jose L.
Topic:
Advanced oxidation processes
This study analyzes the colour acquired by oxidizing paracetamol aqueous samples through the combined US/H2O2 technology. When operating with only the action of the waves [US]=1.0 kWh/mmol C8H9NO2, the water acquires progressively hue according to a ratio of 0.0004 AU/min, with a degradation output...Read more
Oxidation of waters containing 100.0 mg L-1 of caffeine was conducted by a sono-Fenton treatment employing an ultrasound power of 720W at pH=3.0 and T=25°C. The catalytic action of ferrous ion was studied in a range of [Fe2+]0=0-100.0 mg L-1, using oxidant ratios of [H2O2]0=250.0 mM. The oxidation...Read more
Oxidation of waters containing 100.0 mg L-1 of caffeine was conducted by a sono-Fenton treatment employing an ultrasound power of 720W at pH=3.0 and T=25°C. The oxidizing action of hydrogen peroxide was studied in a range between [H2O2]0=0-250.0 mM, using iron ratios of 0.7 mol Fe2+/mol C8H10N4O2...Read more
Changes of dissolved oxygen during the caffeine oxidation by photo-Fenton
Villota N., (Corresponding) Lomas J., (Corresponding) Irene C.
Topic:
Advanced oxidation processes
The aim of this work is to analyse the changes of dissolved oxygen ([DO], mg/L) during the oxidation of caffeine waters by photo-Fenton treatment. The concentration of dosed hydrogen peroxide would be the addition of the stoichiometric [H2O2], which reacts with organic matter ([H2O2]esteq=2.0 mM),...Read more
Colour changes during the carbamazepine oxidation by photo-Fenton
Villota N., (Corresponding) Qullatein H., (Corresponding) Lomas J.
Topic:
Advanced oxidation processes
Oxidation of waters containing 50.0 mg L-1 of carbamazepine was conducted by a photo-Fenton reagent employing a UV lamp of 150W, at pH=3.0 and T=40°C. The oxidising action of hydrogen peroxide was studied in a range between [H2O2]0=0-15.0 mM. When applying stoichiometric ratios of 2 mol C15H12N2O:...Read more
Comparative analysis of chlorinated intermediates formed during electrochemical and photo(electro)catalytic degradation of 4-Ethylphenol in saline media
(Corresponding) Brüninghoff R., van Duijne A., Braakhuis L., Saha P., Jeremiasse A., Mei B., (Corresponding) Mul G.
Topic:
Advanced oxidation processes
Formation of toxic by-products, such as chlorinated intermediates, is one of the major drawbacks of advanced oxidation processes for saline wastewater treatment. Here a comparative analysis of electrochemical oxidation and photocatalytic degradation of 4-Ethylphenol, a non-chlorinated starting...Read more
UV/H2O2 coupled with adsorption in the decolorization and phytotoxicity effects of dye mixtures
Ortega Tapia A., Alvarez Marroquin C., Cardona Rendón L., Arroyave Quiceno C., (Corresponding) Aristizábal Castrillón A.
Topic:
Advanced oxidation processes
UV/H2O2 is an effective process for the decolorization of dyes in water; However, after treatment if complete mineralization is not achieved the toxicity of the wastewater usually increases due to the generation of intermediated more toxic than the dye. Thus, a subsequent process to reduce toxicity...Read more
Evaluation phytotoxic effects and decolorization of simulated and real textile wastewaters by UV/H2O2
Quiceno Gómez L., Hernández Gallo M., Cardona Rendón L., Arroyave Quiceno C., (Corresponding) Aristizábal Castrillón A.
Topic:
Advanced oxidation processes
The discharge of dyes in aquatic ecosystems is of environmental concern due to intense coloration that decrease photosynthetic activity and the possible toxic effects (Hao et al., 2000). Therefore, the development and understanding of processes for the removal of textile dyes in wastewaters, like...Read more
Electrochemical Treatment of Landfill Leachate under Cold Climate Conditions
(Corresponding) Ambauen N., Meyn T., Hallé C., Muff J.
Topic:
Advanced oxidation processes
This study shows that electrochemical oxidation of landfill leachate (LL) is significantly affected by cold temperatures prevailing in Nordic climate areas. As hypothesized, the degradation of common wastewater parameters (TOC, COD) exhibited lower efficiency when low average temperature (13°C) was...Read more
Keywords:
Electrochemical oxidation, pollutant removal, organic disinfection by-products, temperature, applied current
