Results 1 to 10 of about 659,179 (111)

Effect of the CuAl2O4 and CuAlO2 Phases in Catalytic Wet Air Oxidation of ETBE and TAME using CuO/γ‐Al2O3 catalysts

ChemistryOpen, 2019
This paper studies Cu/Al2O3 catalysts, synthesized in two ways: copper deposit in the synthesis of alumina (sol gel) and incipient impregnation stabilized at 400 °C.
Cecilia Sánchez‐Trinidad, Gloria del Angel, Gilberto Torres‐Torres, Adrián Cervantes‐Uribe, A. Abiu Silahua Pavón, Zenaida Guerra‐Que, Juan Carlos Arévalo‐Pérez, Fancisco J. Tzompantzi‐Morales   +7 more
doaj   +2 more sources

Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation

ChemEngineering, 2023
Dissolved inorganic nitrogen (DIN) species are key components of the nitrogen cycle and are the main nitrogen pollutants in groundwater. This study investigated the interconversion and removal of the principal DIN compounds (NO3−, NO2− and NH4+) via UV ...
Alejandro M. Senn, Natalia Quici
doaj   +1 more source

Understanding the effects of mineral water matrix on degradation of several pharmaceuticals by ultrasound: Influence of chemical structure and concentration of the pollutants

Ultrasonics Sonochemistry, 2021
Degradation of seven relevant pharmaceuticals with different chemical structures and properties: acetaminophen (ACE), cloxacillin (CXL), diclofenac (DCF), naproxen (NPX), piroxicam (PXC), sulfacetamide (SAM) and cefadroxil (CDX), in distilled water and ...
Ana L. Camargo-Perea, Efraím A. Serna-Galvis, Judy Lee, Ricardo A. Torres-Palma   +3 more
doaj   +1 more source

Superior selectivity of high-frequency ultrasound toward chorine containing-pharmaceuticals elimination in urine: A comparative study with other oxidation processes through the elucidation of the degradation pathways

Ultrasonics Sonochemistry, 2021
This work considered the sonochemical degradation (using a bath-type reactor, at 375 kHz and 106.3 W L-1, 250 mL of sample) of three representative halogenated pharmaceuticals (cloxacillin, diclofenac, and losartan) in urine matrices. The action route of
Efraím A. Serna-Galvis, John F. Guateque-Londoño, Javier Silva-Agredo, Jazmín Porras, Yenny Ávila-Torres, Ricardo A. Torres-Palma   +5 more
doaj   +1 more source

Assessment of the Arsenic Removal From Water Using Lanthanum Ferrite

ChemistryOpen, Volume 10, Issue 8, Page 790-797, August 2021., 2021
The catalytic performance of lanthanum ferrite LaFeO3 to remove arsenic from water has been investigated for the first time. Fast complete oxidation of As(III) was achieved in 60 min under 254 nm. It is also noteworthy that, after 30 min, >90 % of the initial As(III) is removed. The mechanism of As(III) oxidation to As(V) is discussed.
Fabiana E. García, Marta I. Litter, Isabella Natali Sora   +2 more
wiley   +1 more source

Possibilities and Limitations of the Sono-Fenton Process Using Mid-High-Frequency Ultrasound for the Degradation of Organic Pollutants

Molecules, 2023
Mid-high-frequency ultrasound (200–1000 kHz) eliminates organic pollutants and also generates H2O2. To take advantage of H2O2, iron species can be added, generating a hybrid sono-Fenton process (sF).
Efraím A. Serna-Galvis, Javier Silva-Agredo, Judy Lee, Adriana Echavarría-Isaza, Ricardo A. Torres-Palma   +4 more
doaj   +1 more source

Bimetallic M–Cu (M = Ag, Au, Ni) Nanoparticles Supported on γAl₂O₃-CeO₂ Synthesized by a Redox Method Applied in Wet Oxidation of Phenol in Aqueous Solution and Petroleum Refinery Wastewater

Nanomaterials, 2021
Three bimetallic catalysts of the type M–Cu with M = Ag, Au and Ni supports were successfully prepared by a two-step synthesized method using Cu/Al2O3-CeO2 as the base monometallic catalyst.
Zenaida Guerra-Que, Jorge Cortez-Elizalde, Hermicenda Pérez-Vidal, Juan C. Arévalo-Pérez, Adib A. Silahua-Pavón, Gerardo E. Córdova-Pérez, Ignacio Cuauhtémoc-López, Héctor Martínez-García, Anabel González-Díaz, José Gilberto Torres-Torres   +9 more
doaj   +1 more source

2,5-Dimethylfuran Production by Catalytic Hydrogenation of 5-Hydroxymethylfurfural Using Ni Supported on Al₂O₃-TiO₂-ZrO₂ Prepared by Sol-Gel Method: The Effect of Hydrogen Donors

Molecules, 2022
5-Hydroxymethylfurfural (5-HMF) has been described as one of the 12 key platform molecules derived from biomass by the US Department of Energy, and its hydrogenation reaction produces versatile liquid biofuels such as 2,5-dimethylfuran (2,5-DMF ...
Jorge Cortez-Elizalde, Gerardo E. Córdova-Pérez, Adib Abiu Silahua-Pavón, Hermicenda Pérez-Vidal, Adrián Cervantes-Uribe, Adrián Cordero-García, Juan Carlos Arévalo-Pérez, Norma Leticia Becerril-Altamirano, Nayi Cristel Castillo-Gallegos, María Antonia Lunagómez-Rocha, Jorge Noe Díaz de León, Zenaida Guerra-Que, Alejandra E. Espinosa de los Monteros, José Gilberto Torres-Torres   +13 more
doaj   +1 more source

Más allá del cumplimiento: la justicia como un objetivo de la fiscalización y sanción ambiental

Revista Derecho del Estado, 2023
A través del análisis de un instrumento del derecho sancionatorio ambiental de Estados Unidos, los Supplemental Environmental Projects(SEP), se plantea que la incorporación de reglas y criterios de justicia ambiental en el diseño regulatorio de las ...
Dominique Hervé Espejo
doaj   +1 more source

Materials Based on Co, Cu, and Cr as Activators of PMS for Degrading a Representative Antibiotic—The Strategy for Utilization in Water Treatment and Warnings on Metal Leaching

Molecules, 2023
A chromate of copper and cobalt (Φy) was synthesized and characterized. Φy activated peroxymonosulfate (PMS) to degrade ciprofloxacin (CIP) in water.
Efraím A. Serna-Galvis, Carlos Mendoza-Merlano, Ricardo A. Torres-Palma, Adriana Echavarría-Isaza, Dora A. Hoyos-Ayala   +4 more
doaj   +1 more source