Enginyeria Química i Química Analítica: Envíos recientes
Mostrando ítems 21-40 de 790
Consistent acidogenic co-fermentation of waste activated sludge and food waste under thermophilic conditions
Acidogenic co-fermentation of waste activated sludge (WAS) and food waste (FW) under thermophilic conditions enhances process consistency, while overcoming the problem of acetic acid consumption due to growing methanogens. ...
Bioaggregachromism of Asymmetric Monomethine CyanineDyes as Noncovalent Binders for Nucleic Acids
Two new asymmetric monomethine cyanine dyes, featuring dimethoxy quinoliniumor methyl quinolinium end groups and benzothiazole or methyl benzothiazole endgroups were synthesized. The chemical structures of the two ...
Mejora del aprendizaje en química analítica a través de actividades teórico-prácticas: acercar el laboratorio al aula y el aula al laboratorio
Un problema recurrente en los estudios de Química es la dificultad que presenta el estudiantado para relacionar los conceptos teóricos con las aplicaciones prácticas y viceversa. En este trabajo se muestra el desarrollo ...
Using a batch test to derive sorption data of fluoroquinolone antibiotics in humic acids
Fluoroquinolone antibiotics (FQs) are of concern due to their disrupting effects on environmental bacterial communities. Evaluating FQ sorption by soil components is important to understand their interaction with soils and ...
Recovery of rare earth elements from acidic mine waters by integration of a selective chelating ion-exchanger and a solvent impregnated resin
A polymeric ion-exchange resin, incorporating methyl-amino-phosphonic (TP260) functionalities, and a solvent impregnated resin (SIR) incorporating tri-methylpentylphosphinic acid (TP272), were evaluated for the selective ...
<span style="color:black">Aqueous oxidation of bisphenol analogues by ozone: Relevance of substituents on reactivity</span>
In recent years, bisphenol A has been progressively replaced by other bisphenol analogues, leading to an increase of their occurrence in aquatic environments. However, limited data is available regarding their removal ...
Coffee Husk and Lignin Revalorization: Modification with Ag Nanoparticles for Heavy Metals Removal and Antifungal Assays
This study presents the use of the modified coffee husk and coffee lignin as sorbents in the heavy metal ions sorption of Pb(II), Cd(II), Cr(III), and Cu(II) in an aqueous solution. The modification of sorbents was carried ...
Optimization and Green metrics analysis of the liquid-phase synthesis of sec-butyl levulinate by esterification of levulinic acid with 1-butene over ion-exchange resins
Liquid-phase esterification of levulinic acid (LA) with 1-butene (1B) over ion-exchange resins was studied following an experimental design approach aimed at identifying the optimal conditions to synthesize sec-butyl ...
Effect of ultrasonication on waste activated sludge rheological properties and process economics
The present study provides an overall view of the effect of the ultrasound treatment on waste activated sludge (WAS) rheological and dewatering properties as well as its impact on the economic balance of a theoretical ...
Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-products
Combined sewer overflows (CSO), generated during the wet weather flow from the combination of the inflow and stormwater runoff in sewer system, result in an overflow of untreated wastewater from sewer system, which might ...
A voltammetric electronic tongue based on commercial screen-printed electrodes for the analysis of aminothiols by differential pulse voltammetry
A voltammetric electronic tongue has been designed as a proof of concept for the analysis of aminothiols by differential pulse voltammetry and has been tested in ternary mixtures of cysteine (Cys), homocysteine (hCys) and ...
Equilibrio de intercambio iónico en el ablandamiento de agua con resinas sulfónicas en forma sódica
Se ha esttrdiado el equilibrio de intercambio iónico Ca2+/Na+ con resina sulfónica (IMAC C-12) y en disoluciones de salinidad (0,010 N de Ca2+ y 0,019 N total) análoga a la del agua potabilizada de Barcelona procedente del ...
Novel instrument for automated pKa determination by internal standard capillary electrophoresis
The internal standard capillary electrophoresis method (IS-CE) has been implemented in a novel sequential injection−capillary electrophoresis instrument for the high-throughput determination of acidity constants (pKa) ...
Enantiodetermination of R,S-3,4-methylenedioxypyrovalerone in urine samples by high pressure in-line solid-phase extraction capillary electrophoresis-mass spectrometry
This study presents for the first time an in-line solid-phase extraction capillary electrophoresis-mass spectrometry (SPE-CE-MS) method for the enantiodetermination of drugs of abuse in urine samples. The enantioseparation ...
Phosphorus recovery via vivianite precipitation in anaerobic digestion and fermentation processes: A comprehensive review
Phosphorus recovery is gaining importance due to its supply risk. Wastewater treatment plants (WWTPs) are sinks of phosphorus from municipal and industrial discharges, making them ideal sites for recovery. In WWTPs, the ...
Voltammetric determination of sulfamethoxazole using commercial screen-printed carbon electrodes
A differential pulse voltammetric (DPV) method using commercial screen-printed carbon electrodes (SPCE) is developed for a fast and cost-effective determination of the antibiotic sulfamethoxazole (SMX). Optimal measurements ...
Determination of capsaicinoids and carotenoids for the characterization and geographical origin authentication of paprika by UHPLC-APCI- HRMS
The production area mislabeling of a food product is considered a fraudulent practice worldwide. In this work, a method that uses ultra-high-performance liquid chromatography coupled to high-resolution mass spectrometry ...
Vortex shedding from a spinning cylinder
An experimental investigation of a two-dimensional turbulent wake behind a spinning cylinder at Re=9000 is carried out to determine the influence of the rotation on the initial development of the flow. Spectral analysis ...
Multivariate unmixing approaches on Raman images of plant cell walls: new insights or overinterpretation of results?
Background: Plant cell walls are nanocomposites based on cellulose microfibrils embedded in a matrix of polysaccharides and aromatic polymers. They are optimized for different functions (e.g. mechanical stability) by ...
Process modeling and control applied to real-time monitoring of distillation processes by near-infrared spectroscopy
A distillation device that acquires continuous and synchronized measurements of temperature, percentage of distilled fraction and NIR spectra has been designed for real-time monitoring of distillation processes. As a process ...
