Session 5 - Advanced oxidation processes

[CEST2019_00766] Micro-pollutants, Oxidants, Catalysts and the Water Matrix: A Harmonic Quartet or the War of the Roses?
by Mantzavinos D.

Advanced oxidation processes (AOPs, e.g. heterogeneous and homogeneous photocatalysis, electrochemical oxidation, ozonation, ultrasound irradiation, Fenton and alike reactions, and many more) have been investigated for the treatment of emerging pollutants over the past 20 years (Klavarioti et al., 2009). In particular, the occurrence of persistence micro-pollutants in various water matrices, such as pharmaceuticals and personal care products, raises serious environmental concerns since these xenobiotics can re-enter the water cycle, i.e.

Session: 5, Room: E, at Thu, 09/05/2019 - 09:00 to 09:30
Oral presentation in Advanced oxidation processes
[CEST2019_00259] Electrochemical Treatment of Landfill Leachate under Cold Climate Conditions
by Ambauen N.,Hallé C., Meyn T.

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 applied than compared to room temperature (25°C). At low temperature, 35 % of COD and 64 % of TOC were removed, compared to 69 % of COD and 74 % of TOC removal at high temperature.

Session: 5, Room: E, at Thu, 09/05/2019 - 10:15 to 10:30
Oral presentation in Advanced oxidation processes
[CEST2019_00227] UV/H2O2 coupled with adsorption for decolorization of dye mixtures in water and phytotoxic effects
by Ortega A.C., Alvarez C.F., Cardona L., Arroyave C., Aristizábal A.

The present study reported the decolorization by UV/H2O2 of three dyes and their binary and ternary mixtures in water, simulating colored effluents of the textile industry. The effect of the initial concentration of H2O2, the initial concentration of dyes and the reaction kinetics in the decolorization of textile dyes in water was studied. The efficiency of decolorization of three treatment processes was compared (UV, H2O2 and UV/H2O2).

Session: 5, Room: E, at Thu, 09/05/2019 - 10:00 to 10:15
Oral presentation in Advanced oxidation processes
[CEST2019_00206] Comparative Analysis of Chlorinated Intermediates Formed During Electrochemical and Photo(electro)catalytic Degradation of 4-Ethylphenol in Saline Media
by Brüninghoff R., Van Duijne A., Braakhuis L., Saha P., Jeremiasse A., Mei B., Mul G.

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 model compound of the group of alkylphenols, is presented. Main intermediates have been identified and quantified for brackish [0.03 mol*L-1] and sea water [0.6 mol*L-1] salt concentrations representative for the salt levels in various industrial effluents.

Session: 5, Room: E, at Thu, 09/05/2019 - 09:45 to 10:00
Oral presentation in Advanced oxidation processes
[CEST2019_00015] US/H2O2 combined technology applied to the paracetamol oxidation
by Villota N., Lomas J.M.

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 of 14%. Working under these conditions, the presence of hydroquinone, muconic acid and formic acid is evaluated. Colour formation presents a maximum intensity when water containing paracetamol is degraded using molar ratios of 1.5 mol H2O2/mol C8H9NO2.

Session: 5, Room: E, at Thu, 09/05/2019 - 09:30 to 09:45
Oral presentation in Advanced oxidation processes