Shuyana A. Heredia Deba
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Shuyana A. Heredia Deba has a total of 4 co-authors. Here are the top co-authors by number of shared publications:
- Bas A. Wols
KWR Watercycle Research Institute, 3430 BB Nieuwegein, The Netherlands
4 shared publications - Rob G. H. Lammertink
Membrane Science and Technology, Faculty of Science and Technology (TNW), University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands
4 shared publications - Doekle Yntema
Wetsus, Leeuwarden, The Netherlands
3 shared publications Doekle R. Yntema
1 shared publication
Latest Publications
- Open Access
- 1 December 2022
- Published by Elsevier in Journal of Photochemistry and Photobiology A: Chemistry
- Vol. 437
Photocatalytic ceramic membrane: Effect of the illumination intensity and distribution
- 1 December 2022
- Published by Elsevier in Journal of Photochemistry and Photobiology A: Chemistry
- Vol. 437
Open AccessPhotocatalytic ceramic membrane: Effect of the illumination intensity and distribution
- Open Access
Effects of the Water Matrix on the Degradation of Micropollutants by a Photocatalytic Ceramic Membrane
The consumption of pharmaceuticals has increased the presence of micropollutants (MPs) in the environment. The removal and degradation of pharmaceutical mixtures in different water matrices are thus of significant importance. The photocatalytic degradation of four micropollutants—diclofenac (DCF), iopamidol (INN), methylene blue (MB), and metoprolol (MTP)—have been analyzed in this study by using a photocatalytic ceramic membrane. We experimentally analyzed the degradation rate by using several water matrices by changing the feed composition of micropollutants in the mixture (from mg· L to g·L), adding different concentrations of inorganic compounds (NaHCO3 and NaCl), and by using tap water. A maximum degradation of 97% for DCF and MTP, and 85% for INN was observed in a micropollutants (MPs) mixture in tap water at environmentally relevant feed concentrations [1–6 g·L] and 86% for MB in an MPs mixture [1–3 mg·L] with 100 mg·L of NaCl. This work provides further insights into the applicability of photocatalytic membranes and illustrates the importance of the water matrix to the photocatalytic degradation of micropollutants.Open AccessEffects of the Water Matrix on the Degradation of Micropollutants by a Photocatalytic Ceramic Membrane
The consumption of pharmaceuticals has increased the presence of micropollutants (MPs) in the environment. The removal and degradation of pharmaceutical mixtures in different water matrices are thus of significant importance. The photocatalytic degradation of four micropollutants—diclofenac (DCF), iopamidol (INN), methylene blue (MB), and metoprolol (MTP)—have been analyzed in this study by using a photocatalytic ceramic membrane. We experimentally analyzed the degradation rate by using several water matrices by changing the feed composition of micropollutants in the mixture (from mg· L to g·L), adding different concentrations of inorganic compounds (NaHCO3 and NaCl), and by using tap water. A maximum degradation of 97% for DCF and MTP, and 85% for INN was observed in a micropollutants (MPs) mixture in tap water at environmentally relevant feed concentrations [1–6 g·L] and 86% for MB in an MPs mixture [1–3 mg·L] with 100 mg·L of NaCl. This work provides further insights into the applicability of photocatalytic membranes and illustrates the importance of the water matrix to the photocatalytic degradation of micropollutants. - Open Access
- 1 January 2022
- Published by Elsevier in SSRN Electronic Journal
Advanced Ceramics in Radical Filtration: Tio2 Layer Thickness Effect on the Photocatalytic Membrane Performance
Membranes with advanced oxidation processes (AOPs) are a promising combination to separate and degrade organic pollutants in a single system. In this work, we describe the fabrication and characteristics of nine membranes with different \ce{TiO2} top layer thicknesses (from 0.26 to 21.9 μm), giving attention to the critical catalyst thickness and the formation of defects. We also report the optimum photocatalyst thickness for our single-layer membranes (2.74 μm), after which more titanium dioxide does not improve the degradation. However, an increase in degradation for membranes with multipleTiO2 layers was still possible. These results and the comparisons with the literature suggested that the optimal catalyst thickness is closely related to the material morphology. We obtained a maximum degradation at the lower filtration rate (1.6 L.m-2.h-1) of 72% with a single layer membrane of 3.4 μm and 82% with a membrane with six layers of 21.9 μm. Furthermore, a 1D mass transport and reaction model that describes the coating thickness effect was developed and fitted with the experimental data. Other parameters are also discussed, such as light penetration limitations, surface area, and surface reaction rate constant. These results and analysis provide a better understanding of the fabrication and optimization of photocatalytic membranes.
- 1 January 2022
- Published by Elsevier in SSRN Electronic Journal
Open AccessAdvanced Ceramics in Radical Filtration: Tio2 Layer Thickness Effect on the Photocatalytic Membrane Performance
Membranes with advanced oxidation processes (AOPs) are a promising combination to separate and degrade organic pollutants in a single system. In this work, we describe the fabrication and characteristics of nine membranes with different \ce{TiO2} top layer thicknesses (from 0.26 to 21.9 μm), giving attention to the critical catalyst thickness and the formation of defects. We also report the optimum photocatalyst thickness for our single-layer membranes (2.74 μm), after which more titanium dioxide does not improve the degradation. However, an increase in degradation for membranes with multipleTiO2 layers was still possible. These results and the comparisons with the literature suggested that the optimal catalyst thickness is closely related to the material morphology. We obtained a maximum degradation at the lower filtration rate (1.6 L.m-2.h-1) of 72% with a single layer membrane of 3.4 μm and 82% with a membrane with six layers of 21.9 μm. Furthermore, a 1D mass transport and reaction model that describes the coating thickness effect was developed and fitted with the experimental data. Other parameters are also discussed, such as light penetration limitations, surface area, and surface reaction rate constant. These results and analysis provide a better understanding of the fabrication and optimization of photocatalytic membranes.
- Open Access
- 1 January 2022
- Published by Elsevier in SSRN Electronic Journal
Photocatalytic Ceramic Membrane: Effect of the Illumination Intensity and Distribution
The principles and application of heterogeneous photocatalytic processes have gained wide attention, especially to the effectiveness of the process. In this work a mono and a multi-LED lamp are used to study the impact of the UV light intensity and distribution on the semiconductor surface during the degradation of organic compounds in water. A well-defined scan of the electromagnetic radiation profile on the surface of the membrane was obtained and evaluated. Comparing two lamp configurations with a total photon flux of 210 W/m2 and using a filtration rate of 9.7 L.m-2h-1, resulted in 20% more degradation for the most homogeneous light distribution. Furthermore, the reaction rate relation to the photon flux was also studied, with a surface reaction model that includes possible mass transfer limitations. The surface reaction constant increased linearly with the irradiation intensity for the complete studied range [50 to 550 W/m2] for the most homogeneous illumination distribution. A less uniform distribution resulted in a less than proportional reaction rate constant with respect to the incident photon flux between 100 and 210 W/m2. This work adds valuable information to the photocatalysis field to improve the light efficiency in a photoreactor to enhance the degradation of pollutants.
- 1 January 2022
- Published by Elsevier in SSRN Electronic Journal
Open AccessPhotocatalytic Ceramic Membrane: Effect of the Illumination Intensity and Distribution
The principles and application of heterogeneous photocatalytic processes have gained wide attention, especially to the effectiveness of the process. In this work a mono and a multi-LED lamp are used to study the impact of the UV light intensity and distribution on the semiconductor surface during the degradation of organic compounds in water. A well-defined scan of the electromagnetic radiation profile on the surface of the membrane was obtained and evaluated. Comparing two lamp configurations with a total photon flux of 210 W/m2 and using a filtration rate of 9.7 L.m-2h-1, resulted in 20% more degradation for the most homogeneous light distribution. Furthermore, the reaction rate relation to the photon flux was also studied, with a surface reaction model that includes possible mass transfer limitations. The surface reaction constant increased linearly with the irradiation intensity for the complete studied range [50 to 550 W/m2] for the most homogeneous illumination distribution. A less uniform distribution resulted in a less than proportional reaction rate constant with respect to the incident photon flux between 100 and 210 W/m2. This work adds valuable information to the photocatalysis field to improve the light efficiency in a photoreactor to enhance the degradation of pollutants.