Displaying 11 - 20 of 39 in oxidation (remove filter)
CEST Proceedings are published under the ISSN 2944-9820.
Origin of Cr in alluvial sediments and ultramafic rocks in Sultanate of Oman. Magnetic fractionation and sunlight effect.
(Corresponding) Moraetis D., Al-Suhai S., Pracejus B., Pyrgaki K., Argyraki A., Dermatas D.
Topic:
Soil and groundwater contamination and remediation
The present study attempts to identify the sources of Cr(VI) in a coastal alluvial fan soil and soil from a chromite mine. In addition investigates the effect of photochemically oxidized organic matter in the Cr(VI) mobilization in soil. The alluvial bulk soil samples contain several evidence of...Read more
Elimination of relevant pharmaceuticals in hospital wastewater from Colombia by combination of a biological system with a sonochemical process
(Corresponding) TORRES PALMA R., Serna-Galvis E., Silva-Agredo J.
Topic:
Advanced oxidation processes
This work presents the treatment of selected emerging concern pharmaceuticals in real hospital wastewater (HWW) from Tumaco-Colombia by combination of a biological system with a sonochemical process. Fifteen compounds, commonly present in HWW, were considered: acetaminophen, diclofenac,...Read more
New pillared clays for the removal of pollutants from wastewater by treatment with oxidation processes
(Corresponding) Kalmakhanova M., Massalimova B., Diaz de Tuesta J., Gomes H.
Topic:
Advanced oxidation processes
The constant development of technological processes aggravates the problem of pollution, due to a significant change in the composition of effluents that makes necessary the development of new (and/or improvement of the existing) treatment methods and catalytic materials. In this sense, the use of...Read more
Valorisation of polyolefins into magnetic carbon nanotubes: application as catalysts in wet peroxide oxidation of paracetamol
Sanches L., (Corresponding) dos Santos Silva A., Fontana Roman F., Diaz de Tuesta Triviño J., Alves da Silva F., Gomes H.
Topic:
Advanced oxidation processes
This work deals with the application of magnetic carbon nanotubes (MCNTs) in the catalytic wet peroxide oxidation (CWPO) of paracetamol (PCM), a pharmaceutical compound selected as model contaminant of emerging concern (CEC). MCNTs were synthetized by catalytic chemical vapor deposition (CCVD) at...Read more
Carbon nanotubes synthesized from LDPE for application in wet peroxide oxidation of paracetamol
(Corresponding) Roman F., Marim Lopes J., Diaz de Tuesta J., Lenzi G., Tavares da Silva A., Faria J., Gomes H.
Topic:
Advanced oxidation processes
Carbon nanotubes (CNTs) were produced by chemical vapor deposition (CVD) considering low-density polyethylene (LDPE) as a carbon source and as an alternative to upcycle plastic solid waste. The CNTs were synthesized over bimetallic catalysts (Ni and Fe) supported on Al2O3 and purified with H2SO4 to...Read more
Selective denitrification of lipophilic pollutants from oily wastewater by peroxidation using Janus-structured amphiphilic carbon nanotubes as catalysts
Sanches F., Roman F., Silva A., Diaz de Tuesta J., Marin P., Machado B., Serp P., Silva A., (Corresponding) Gomes H.
Topic:
Advanced oxidation processes
Carbon nanotubes (CNTs) were tested as catalysts in the selective denitrification of 4-nitrophenol (4-NP) from oily wastewater by catalytic wet peroxide oxidation (CWPO). The CNTs were prepared by chemical vapor deposition, feeding sequentially ethylene (E) and/or acetonitrile (A) during different...Read more
Application of carbon-based catalysts derived from compost on catalytic wet peroxide oxidation of leachate waters from mechanical and biological treatment plant units for municipal solid waste
Batista G., (Corresponding) Roman F., Diaz de Tuesta J., Mambrini R., Gomes H.
Topic:
Advanced oxidation processes
This work aims at the valorization of compost from mechanical and biological treatment (MBT) units of municipal solid waste by their transformation into carbon-based catalysts for further application in the treatment of MBT leachate waters (chemical oxygen demand (COD) = 60.0 g L-1, total organic...Read more
Fire-induced oxidation of Cr(III) in serpentine soils
(Corresponding) Botsou F., Vitzilaiou S., Guerra G., Valla P., Kelepertzis E., Dassenakis M., Argyraki A.
Topic:
Soil and groundwater contamination and remediation
Ophiolite rocks and their weathering products are the major hosts of Cr(III)-bearing phases in the Earth’s crust. Trivalent Cr is rather benign, but risks arise because of its potential for oxidation to the toxic and carcinogenic hexavalent form. Manganese oxides are the most effective natural...Read more
CO abatement via Ir-based catalysts: effect of the support and preparation method on catalytic activity and stability
Drosou C., Fountouli T., Stratakis A., Charisiou N., Goula M., (Corresponding) Yentekakis I.
Topic:
Air pollution
Here we report on the effect of the support and preparation method on the activity and stability of Ir-based catalysts under CO oxidation. Alunina-ceria-zirconia (ACZ: 60wt%Al2O3 - 40wt%CexZr1-xO2, x=0.25, 0.5, 0.75) mixed oxide supports with high oxygen storage capacity (OSC) were synthesized via...Read more
Development of a non-target screening workflow for the evaluation of micropollutants fate during oxidation processes
(Corresponding) Huynh N., Le Roux J., Guyot J., Moilleron R.
Topic:
Emerging pollutants
Non-target screening (NTS) is of great interest for environmental monitoring because it enables the screening of numerous pollutants, including unknown products. However, methods to identify unknowns are still time-consuming and only deal with a limited portion of the signal. The objective of this...Read more
