Conference proceedings

Displaying 1 - 6 of 6 in Advanced oxidation processes (remove filter), caffeine (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

Conference:

CEST2019

Paper ID:

cest2019_00014

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

Conference:

CEST2019

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

Conference:

CEST2019

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

Conference:

CEST2019

Paper ID:

cest2019_00071

Caffeine oxidation by sono-Fenton treatment

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

Topic:

Advanced oxidation processes

Oxidation of waters containing caffeine was conducted by a sono-Fenton treatment employing an ultrasound power of 720 W at pH=3.0 and T=25°C. The catalytic action of ferrous ion was studied in a range of [Fe]=0-100.0 mg/L and oxidant concentrations between [H2O2]=0-250.0 mM. The oxidation of...Read more

Keywords:

aromaticity, caffeine, color, turbidity, sono-Fenton

DOI:

https://doi.org/10.30955/gnc2021.00015

Conference:

CEST2021

Paper ID:

cest2021_00015

Comparison of caffeine oxidation by Fenton reagent in combination with UV light and ultrasound waves

(Corresponding) Villota N., Lomas J., Ferreiro C., Lombraña J.

Topic:

Advanced oxidation processes

The oxidation of aqueous caffeine solutions ([Ca]0=100.0 mg L-1) was analysed, 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

Conference:

CEST2021

Paper ID:

cest2021_00338