Conference proceedings

Displaying 1 - 10 of 24 in CEST2019 (remove filter), 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

Keywords:

AOPs; caffeine; Fenton reagent; ultrasounds waves; ultraviolet light

DOI:

https://doi.org/10.30955/gnc2019.00014

Paper ID:

cest2019_00014

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

Keywords:

colour; paracetamol; sono-Fenton; suspended solids; turbidity

DOI:

https://doi.org/10.30955/gnc2019.00015

Paper ID:

cest2019_00015

Effect of iron catalyst on caffeine oxidation by sono-Fenton technology

Villota N., (Corresponding) Lomas J., (Corresponding) Sardón L., (Corresponding) Ferreiro C.

Topic:

Advanced oxidation processes

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

Keywords:

aromaticity, caffeine, colour, sono-Fenton, turbidity

DOI:

https://doi.org/10.30955/gnc2019.00064

Paper ID:

cest2019_00064

Effect of hydrogen peroxide on caffeine oxidation by sono-Fenton technology

Villota N., (Corresponding) Lomas J., (Corresponding) Camarero L., (Corresponding) Ferreiro C., (Corresponding) Sardon L.

Topic:

Advanced oxidation processes

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

Keywords:

aromaticity, caffeine, colour, sono-Fenton, turbidity

DOI:

https://doi.org/10.30955/gnc2019.00070

Paper ID:

cest2019_00070

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

Keywords:

caffeine, dissolved oxygen, ferrous ion, kinetic modelling, photo-Fenton

DOI:

https://doi.org/10.30955/gnc2019.00071

Paper ID:

cest2019_00071

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

Keywords:

acridone, carbamazepine, colour, oxo-carbazepine, photo-Fenton

DOI:

https://doi.org/10.30955/gnc2019.00079

Paper ID:

cest2019_00079

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

Keywords:

Advanced Oxidation Process, Photocatalytic Degradation, Electrochemical Oxidation, Chlorination, Intermediates

DOI:

https://doi.org/10.30955/gnc2019.00206

Paper ID:

cest2019_00206

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

Keywords:

phytotoxicity, dyes mixtures, decolorization, mineralization, bioassays

DOI:

https://doi.org/10.30955/gnc2019.00227

Paper ID:

cest2019_00227

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

Keywords:

Wastewater, textile industry, H2O2/UV, phytotoxicity

DOI:

https://doi.org/10.30955/gnc2019.00228

Paper ID:

cest2019_00228

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

DOI:

https://doi.org/10.30955/gnc2019.00259

Paper ID:

cest2019_00259