Ingeniería Química (Datos de Investigación)
URI permanente para esta colecciónhttps://hdl.handle.net/11441/152268
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Dataset Dataset for the article Modeling copper leaching from non-pulverized printed circuit boards at high concentrations of bioregenerated ferric sulfate(2024) Ramírez del Amo, Pablo; Iglesias González, María Nieves; Dorado Castaño, Antonio D.; Universidad de Sevilla. Departamento de Ingeniería Química; Ramírez del Amo, Pablo; Universidad de Sevilla. TEP-186: BiohidrometalurgiaExperimental data of copper leaching kinetics from non-pulverized printed circuit boards are compiled. They consist of the leached copper values as a function of time for the different tests performed. The copper concentrations were measured by atomic absorption spectrophotometry. Moreover, scanning electron microscope photomicrographs and energy dispersive X-ray spectroscopy data of a PCB sample has been included.Dataset Dataset of the paper “From a hazardous waste to a commercial product Learning circular economy in the chemistry lab”(2024) Iglesias González, María Nieves; Ramírez del Amo, Pablo; Lorenzo Tallafigo, Juan; Universidad de Sevilla. Departamento de Ingeniería Química; Iglesias González, María Nieves; Universidad de Sevilla. TEP-186: BiohidrometalurgiaThe laboratory experiment “Valorization of waste with high Zn content” was designed to introduce the concept of circular economy and waste recovery to students of the Materials Engineering Degree at the University of Seville (Spain). This laboratory experiment has been carried out every academic year since 2015-16. This document contains the experimental data collected during the laboratory practices, which are necessary to respond to the questionnaire posed to the students. Likewise, the anonymized responses of the students to the pre- and post-laboratory questionnaires that were designed to evaluate the achievement of the pedagogical objectives are included.Dataset Experimental dataset of a high productivity bioprocess for obtaining metallic copper from printed circuit boards [Dataset](2024-07-25) Iglesias González, María Nieves; Dorado, Antonio D.; Ramírez del Amo, Pablo; Mazuelos Rojas, Alfonso; Universidad de Sevilla. Departamento de Ingeniería Química; Iglesias González, María Nieves; Ministerio de Ciencia e Innovación (MICIN). España; TEP-186: BiohidrometalurgiaHere, experimental data for the different stages of a bioprocess for obtaining copper from printed circuit boards are compiled. Chemical analysis data to determine the chemical composition of samples and residues. Conditions and results of batch and continuous leaching, solvent extraction, biooxidation and electrowinning tests are included.Dataset Dataset for article Relation between HLB number and predominant destabilization process for microfluidized nanoemulsions formulated with lemon essential oil [Dataset](2024-01-18) Santos García, Jenifer; Alfaro Rodríguez, María del Carmen; Vega, Lilliam; Muñoz García, José; Universidad de Sevilla. Departamento de Ingeniería Química; Alfaro Rodríguez, María del Carmen; Vega, Lilliam; Alfaro Rodríguez, María del Carmen; Junta de Andalucía; European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER); Universidad de Sevilla. TEP-943. Reologia. Tecnologia de ColoidesLemon essential oil (LEO) is associated with a multitude of health benefits due to its anticancer, antioxidant, antiviral, anti-inflammatory and bactericidal properties. Its drawback is that it is very sensitive to oxidation by heat. For this reason, researchers are increasingly investigating the use of LEO in nanoemulsions. In this work, we used laser diffraction, rheology and multiple light scattering techniques to study the effects of different HLB numbers (indicating different mixtures of Tween 80 and Span 20) on the physical stability of nanoemulsions formulated with LEO. We found that different HLB numbers induced different destabilization mechanisms in these emulsions. An HLB number lower than 12 resulted in an Ostwald ripening effect; an HLB number higher than 12 resulted in coalescence. In addition, all the developed nanoemulsions exhibited Newtonian behavior, which could favor the mechanism of creaming. All emulsions exhibited not only a growth in droplet size, but also a creaming with aging time. These findings highlight the importance of selecting the right surfactant to stabilize nanoemulsions, with potential applications in the food industryDataset Dataset for article Effect of a Change in the CaCl2/Pectin Mass Ratio on the Particle Size, Rheology and Physical Stability of Lemon Essential Oil/W Emulgels(2022-10) Muñoz García, José; Prieto Vargas, Paula; García González, María del Carmen; Alfaro Rodríguez, María del Carmen; Universidad de Sevilla. Departamento de Ingeniería Química; Alfaro Rodríguez, María del Carmen; Prieto Vargas, Paula; Alfaro Rodríguez, María del Carmen; Junta de Andalucía; European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER); Universidad de Sevilla. TEP-943. Reologia. Tecnologia de ColoidesA three-step (rotor-stator-microfluidization-rotor stator) protocol was used to prepare 15% lemon essential oil in water emulgels using a mixture of Tween 80 and Span 20 surfactants as low molecular mass emulsifiers and 0.4% low-methoxyl citrus peel pectin as a gelling agent. Ca2+ was used as a gel-promoting agent. Different CaCl2/pectin mass ratio values from 0.3 to 0.7 were used. Emulgels showed a microstructure consisting of oil droplets embedded in a sheared gel matrix, as demonstrated by bright field optical microscopy. Laser diffraction tests showed multimodal particle size distributions due to the coexistence of oil droplets and gel-like particles. Multiple light scattering tests revealed that the physical stability of emulgels was longer as the CaCl2/pectin mass ratio decreased and that different destabilization mechanisms took place. Thus, incipient syneresis became more important with increasing CaCl2 concentration, but a parallel creaming mechanism was detected for CaCl2/pectin mass ratio values above 0.5. Dynamic viscoelastic and steady shear flow properties of the emulgels with the lowest and highest CaCl2/pectin mass ratio values were compared as a function of aging time. The lowest ratio yielded an emulgel with enhanced connectivity among fluid units as indicated by its wider linear viscoelastic region, higher storage modulus, loss modulus and viscosity values, and more shear thinning properties than those of the emulgel formulated with the highest CaCl2/pectin mass ratio. The evolution of the dynamic viscoelastic properties with aging time was consistent with the information provided by monitoring scans of backscattering as a function of sample height