Person:
García Rodríguez, Juan

First Name

Juan

Last Name

García Rodríguez

URI

https://hdl.handle.net/20.500.14352/76093

Affiliation

Universidad Complutense de Madrid

Faculty / Institute

Ciencias Químicas

Department

Ingeniería Química y de Materiales

Area

Ingeniería Química

Identifiers

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Search Results

Now showing 1 - 10 of 16

Project number: PIMCD405/23-24
Dando a conocer la Ingeniería Química: del bachillerato a la Universidad… y vuelta!
(2024) Martín Martínez, María; Águeda Maté, Vicente Ismael; Álvarez Torrellas, Silvia; Carbajo Olleros, Jaime; Delgado Dobladez, José Antonio; García Rodríguez, Juan; Larriba Martínez, Marcos; Calero Berrocal, Ruben; Cañada Barcala, Andres; Huber Benito, Diego; Martin Gutierrez, Diego; Pascual Muñoz, Gonzalo; Peinado Serrano, M. Cristina; Pinzolas Rubio, Alejandro; Portillo Sanchez, Eva; Rodriguez Llorente, Diego; Sanchez Quiñones, Carlos A. A.; Sanchez Fernandez, Ignacio
Project number: 78
Lab at home: prácticas de Ingeniería Química en tiempos de confinamiento
(2021) Larriba Martínez, Marcos; Ovejero Escudero, Gabriel; García Rodríguez, Juan; Delgado Dobladez, José Antonio; Águeda Maté, Vicente Ismael; Curto Maldonado, Andrés; Serra Pérez, Estrella; Hernández Abreu, Ana Belén; Uribe Santos, Dora Lucía; Pascual Muñoz, Gonzalo; Rodríguez Llorente, Diego; Cañada Barcala, Andrés; Sanz Santos, Eva; Huaccallo Aguilar, Ysabel; Ruiz de León Gómez, Carlos; Cañas Jiménez, Javier
En este proyecto de innovación docente se han desarrollado prácticas de laboratorio de dos asignaturas del Grado en Ingeniería Química, Ingeniería Térmica y Operaciones de Separación, para así garantizar la experimentalidad en situaciones de docencia no presencial empleando materiales cotidianos e instalaciones confeccionadas por impresión 3D, que podrán ser empleadas por los estudiantes en situación de confinamiento.
Efficient removal of antibiotic ciprofloxacin by catalytic wet air oxidation using sewage sludge-based catalysts: degradation mechanism by DFT studies
(Journal of Environmental Chemical Engineering, 2023) Gutiérrez Sánchez, Pablo; Álvarez Torrellas, Silvia; Larriba Martínez, Marcos; Gil, María Victoria; Garrido Zoido, Juan Manuel; García Rodríguez, Juan
In this work, the sewage sludge-derived activated carbon (SAC) loaded with iron nanoparticles (FeSAC) showed a highly effective catalytic activity in the degradation of the antibiotic ciprofloxacin by the CWAO reaction. The properties of FeSAC catalyst were studied by using N2 adsorption-desorption measurements at 77 K, scanning electron microscopy, X-ray fluorescence spectroscopy, X-ray photoelectron spectroscopy and thermogravimetric analysis. The CWAO reaction was evaluated at different temperatures (120–140 ºC), total pressure (10–30 bar) and catalyst doses (0.1–0.7 g/L) in a batch reactor. In this regard, temperature and catalyst dosage showed a significant impact on the removal of the tested antibiotic. By using a catalyst dose of 0.7 g/L, ciprofloxacin degradation and CO2 selectivity were higher than 99 % and 60 %, respectively, and were achieved within two hours at 140 °C and 20 bar. The loss of the active phase (Fe) of the catalyst in the reaction medium was measured, obtaining negligible values (less than 24 ppb). This catalyst showed high stability under the tested reaction conditions. In addition, a potential equation was proposed to correctly describe the evolution of ciprofloxacin degradation. The calculated activation energy of the CWAO process was 53.8 kJ/mol. Additionally, Density Functional Theory (DFT) calculations were performed to illustrate the degradation mechanism of ciprofloxacin, where the electronic energies indicated the compounds that are most difficult to degrade by CWAO. Finally, a proof of concept using an environmentally-relevant matrix was carried out, verifying the technical feasibility of the synthesized catalyst for its application with more complex matrices, consecutive reaction cycles and at a low treatment cost
Insights of emerging contaminants removal in real water matrices by CWPO using a magnetic catalyst
(Journal of Environmental Chemical Engineering, 2021) Huacallo Aguilar, Ysabel; Álvarez Torrellas, Silvia; Gil, Maria Victoria; Larriba Martínez, Marcos; García Rodríguez, Juan
The study was focused on the application of catalytic wet peroxide oxidation (CWPO) with a synthesized magnetic catalyst (Fe3O4/MWCNTs) for the treatment of real water matrices spiked with pharmaceutical compounds. CWPO was carried out by modifying the initial pH of surface water (SW), wastewater treatment plant (WWTP) effluent, brewery wastewater (BW) and hospital wastewater (HW), and the effect of the addition of the emerging pollutants naproxen (NAP) and diclofenac (DCF). From the experimental results, pH and concentration of NAP and DCF in CWPO were crucial factors in the successful pollutants removal from water matrices. The lab-prepared catalyst showed high removal rates of NAP and DCF from different water matrices spiked with the NAP-DCF mixture at pH 5.0. The highest average removal rate of TOC (75%), NAP (66%), DCF (76%), TN (39%) and aromaticity (68.39%) was obtained for SW matrix using 1.0 g L−1 of catalyst, pH ≈ 5.0, 5 mM of H2O2 and 60 °C. The mineralization decreased with the increase of the initial TOC concentration of the tested matrix. By CWPO tests of the real water matrices it was demonstrated that DCF removal was higher than NAP. From the recyclability tests, the catalyst demonstrated high activity and stability along three consecutive CWPO cycles of 8 h each one. The pseudo-second order model well-described the degradation of NAP and DCF. Finally, aromaticity and toxicity of the effluents were greatly reduced after CWPO treatment. This work demonstrated that CWPO with the magnetic catalyst is an efficient method to remove DCF-NAP mixtures from real aqueous matrices
Influence of transition metal-based activating agent on the properties and catalytic activity of sewage sludge-derived catalysts. Insights on mechanism, DFT calculation and degradation pathways
(Journal of Molecular Liquids, 2023) Gutiérrez Sánchez, Pablo; Álvarez Torrellas, Silvia; Larriba Martínez, Marcos; Gil, María Victoria; Garrido Zoido, Juan Manuel; García Rodríguez, Juan
Research studies combining the detailed physicochemical properties' analysis, the catalytic activity in different real aqueous matrices, the proposal of degradation mechanisms and the stability of the intermediates/by-products by means of the Density-functional theory (DFT) are scarce. Therefore, this work gives a step forward in the field of circular economy and the removal of emerging pollutants such as the antibiotic ciprofloxacin, covering all the previously aspects mentioned, using four iron and nickel-based catalysts from two different sewage sludge. Experimental results revealed a significant influence of both the source of the sewage sludge and the activating agent used (iron chloride, nickel chloride and a mixture of both) on the physicochemical properties of the materials and, hence, on their catalytic activity. FTIR studies and chemical composition evidenced that the use of this biomass precursor leads to the generation of a wide variety of functional groups and heteroatoms in the synthesized catalyst structure. Moreover, they showed a combination of Type I-IV isotherms with H3-H4 type hysteresis loops, being mainly mesoporous materials and exhibiting a moderate microporosity except when nickel chloride was used solely as activating agent. The carbonaceous materials reached ciprofloxacin adsorption capacities in the range of 40.4–73.9 mg/g. The use of nickel chloride showed the lowest adsorption contribution and catalytic activity. The bimetallic catalyst (synthesized from a mixture of iron and nickel chloride) showed slightly higher catalytic activity than that found for the iron catalyst, but the metal leaching was also considerably higher. Consequently, the use of iron chloride solely as activating agent seems to be the better alternative, achieving a maximum ciprofloxacin removal around 99.7 % and an iron leaching concentration into the reaction medium of 0.48–0.61 mg/L. The main degradation pathways of ciprofloxacin were proposed according to the detection of LC-MS intermediates and DFT calculation, indicating the most likely areas of attack of reactive species on atoms with a high Fukui index (f0)
Project number: 171
Aprende a emprender: del TFG en el Grado de Ingeniería Química al mercado laboral
(2019) Águeda Mate, Vicente Ismael; Ovejero Escudero, Gabriel; Uguina Zamorano, María de los Ángeles; Delgado Dobladez, José Antonio; Álvarez Torrellas, Silvia; García Rodríguez, Juan; Larriba Martínez, Marcos; Sánchez Alonso, Jorge; Aranda López, Daniel; Hernández Abreu, Ana Belén; Serra Pérez, Estrella; Uribe Santos, Dora Lucía; Ruiz de León Gómez, Carlos; Huaccallo Aguilar, Ysabel; Garrido Escudero, Amalio; Villarroel Amoraga, María; Carretero Gómez, Silvia
Se constituirá una Empresa de Ingeniería con un grupo de estudiantes del TFG del Grado en Ingeniería Química que diseñe una planta química. Diferentes agentes asesorarán en la búsqueda de financiación, diseminación y desarrollo de las actividades.
Project number: 208
Practicando Ingeniería Química: Prácticas colaborativas de bajo coste para grupos numerosos
() Larriba Martínez, Marcos; Ovejero Escudero, Gabriel; García Rodríguez, Juan; Delgado Dobladez, José Antonio; Águeda Maté, Vicente Ismael; Álvarez Torrellas, Silvia; Martín Martínez, María; Carbajo Olleros, Jaime; García Sánchez, Laura; Guerrero Moreno, Elisa; Aranda López, Daniel; Serra Pérez, Estrella; Pascual Muñoz, Gonzalo; Rodríguez Llorente, Diego; Cañada Barcala, Andrés; Sanz Santos, Eva; Gutiérrez Sánchez, Pablo; Calero Berrocal, Rubén; Sánchez Quiñones, Carlos Alberto Augusto; Cañas Jiménez, Javier; Huber Benito, Diego; Portillo Sánchez, Eva; Martín Gutiérrez, Diego; Suárez Rodríguez, Pablo; Sánchez Fernández, Ignacio
Elaboración de un catálogo de prácticas de laboratorio de bajo coste para trabajar los fundamentos de ingeniería química con grupos numerosos, usando metodologías activas de aprendizaje para incrementar la motivación de los estudiantes.
Extraction of pharmaceuticals from hospital wastewater with eutectic solvents and terpenoids: computational, experimental, and simulation studies
(Chemical Engineering Journal, 2022) Rodríguez Llorente, Diego; Hernández, Elisa; Gutiérrez Sánchez, Pablo; Navarro, Pablo; Águeda Maté, V. Ismael; Álvarez Torrellas, Silvia; García Rodríguez, Juan; Larriba Martínez, Marcos
The presence of pharmaceuticals in wastewater, mainly in hospital wastewater, is a serious environmental concern, as they are not removed by conventional processes in wastewater treatment plants and are discharged into the natural environment. This work proposes extracting drugs from hospital wastewater using natural, renewable, and non-toxic solvents such as terpenes and eutectic solvents. First, molecular simulation has been used with the COSMO-RS method performing a massive screening of 43 terpenes, 11 eutectic solvents, and 5 conventional solvents with 31 common pharmaceuticals. The most promising solvents in the screening have been chosen to extract 11 pharmaceuticals simultaneously. Experimental tests with ultrapure water and real hospital wastewater matrices showed a strong influence of pH and matrix on extraction. Under the optimal conditions, global pharmaceutical extraction yields with carvacrol of 94.16 % and the eutectic solvent thymol+dodecanoic acid of 96.86 % were obtained. The regeneration and reuse of both solvents were studied in 5 consecutive stages, showing the carvacrol's high stability and regenerability. Using carvacrol, countercurrent extraction tests showed a fast mass transfer of pharmaceuticals and high extraction yields using low solvent-to-feed (S/F) ratios. The predictions obtained with COSMO-RS were similar to the experimental results, confirming the reliability of this method for selecting alternative solvents for the extraction of pharmaceuticals. Finally, the drug removal process was simulated in a countercurrent extraction. The complete removal of pharmaceuticals from hospital wastewater could be achieved using carvacrol with an S/F of 2.00 at pH 4.00 in an extractor with six equilibrium stages.
Novel approach for azole fungicides extraction from aqueous environments using terpenes and eutectic solvents
(Journal of Environmental Chemical Engineering, 2023) Rodríguez Llorente, Diego; García Fernández de la Puente, Enrique; García Rodríguez, Juan; Larriba Martínez, Marcos
The presence of azole fungicides in aquatic environments is a significant issue due to their toxicity and persistence related to a low removal of these compounds by conventional processes in wastewater treatment plants. A growing environmental public concern is reflected in the inclusion of these compounds in the 2020 and 2022 European Surface Water Watch Lists. Therefore, it is necessary to develop efficient processes that allow their removal sustainably. This work applies liquid-liquid extraction using terpenes as green solvents and terpene-based eutectic solvents to remove azole fungicides from aqueous streams imazalil, metconozale, penconazole, prochloraz, and tebuconazole. First, an initial screening was performed by molecular simulation using the COSMO-RS method. The selected solvents were applied in the individual extraction of azole fungicides, and selecting the solvents thymol+octanoic acid and carvacrol. These solvents have been tested in studies with surface water matrix on the effect of temperature, initial concentration, and pH on extraction performance. From these results, it has been shown that carvacrol is the solvent that is least affected by these variables and obtains extraction yields higher than 97.88%, with a Solvent/Feed ratio up to 0.050, outperforming the conventional solvent methyl isobutyl ketone. This solvent has been used in solvent reuse cycles obtaining a reduction of less than 1% in three extraction cycles. Therefore, carvacrol is presented as a sustainable solvent for the extraction of azole fungicides from aqueous environments.
Sustainable recovery of phenolic antioxidants from real olive vegetation water with natural hydrophobic eutectic solvents and terpenoids
(Environmental Research, 2023) Rodríguez Llorente, Diego; Martín Gutiérrez, Diego; Suárez Rodríguez, Pablo; Navarro Tejedor, Pablo; Álvarez Torrellas, Silvia; García Rodríguez, Juan; Larriba Martínez, Marcos
Olive oil production leads to the generation of olive mill wastewater (OMWW). Due to the presence of phenolic compounds, they are difficult to process, but they represent a source of high-added value chemicals since they have antioxidant and therapeutic properties. This work has studied the extraction of phenolic compounds from a type of OMWW, olive vegetation water, which presents these compounds in a more diluted dosage than in other studied to date, to revalue this waste stream. A real olive vegetation water from a Spanish olive oil producer was used, and liquid-liquid extraction was applied. Terpenoids and terpene-based hydrophobic eutectic solvents were systematically used to extract phenolic compounds following the concentrations of tyrosol, catechol, caffeic acid, and total phenolic content. By molecular simulation with the COSMO-RS method, 4 terpenoids, and 2 eutectic solvents were selected and compared with 2 conventional solvents. The Solvent/Feed ratio in the extraction of phenolic compounds was studied, showing that the solvents with the highest extraction results were geraniol, eucalyptol, and eutectic solvent menthol + camphor, which outperformed conventional solvents methyl isobutyl ketone and diisopropyl ether. Menthol + camphor gave total phenol extraction yields of 88.73% at a Solvent/Feed ratio in volume of 0.50, surpassing all solvents tested. A solvent reuse and regeneration process was applied by back-extraction of the 4 solvents: FTIR results showed the stability of the solvents while maintaining yields in the solvent reuse process. The phenolic compounds could be concentrated in the alkaline phase to factors up to 49.3 to the initial concentration in olive vegetation water. The alkaline phases were neutralized to obtain a precipitate with a caffeic acid content of up to 26 % wt%, and a tyrosol-rich supernatant with a concentration of up to 6.54 g/L. This work proposes a process using natural solvents to extract phenolic compounds from olive vegetation water.