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García-Ramírez P, Diaz-Torres LA. Self-cleaning cellulose acetate/crystalline nanocellulose/polyvinylidene fluoride/Mg 0.975Ni 0.025SiO 3membrane for removal of diclofenac sodium and methylene blue dye in water. Nanotechnology 2023; 35:015703. [PMID: 37751721 DOI: 10.1088/1361-6528/acfd32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 09/25/2023] [Indexed: 09/28/2023]
Abstract
Recalcitrant pollutants present in wastewater, without an effective treatment, have several effects on aquatic ecosystems and human health due to their chemical structure and persistence. Therefore, it is crucial the development of efficient technologies to eliminate such pollutants in water. Nano-photocatalysts are considered a promising technology for water remediation; however, one common drawback is the difficulty of recovering it after water processing. One effective strategy to overcome such problem is its immobilization into substrates such as polymeric membranes. In this study, a polymeric membrane with embedded Mg0.975Ni0.025SiO3is proposed to remove model pollutants diclofenac sodium and methylene blue dye by synergetic adsorption and photocatalytic processes. Mg0.975Ni0.025SiO3was synthesized by the combustion method. The matrix polymeric blend consisting of a blend of cellulose acetate, crystalline nanocellulose and polyvinylidene fluoride was obtained by the phase inversion method. The composite membranes were characterized by FTIR, x-ray diffraction, and scanning electron microscopy. With pollutant solutions at pH 7, the pollutant adsorption capacity of the membranes reached up to 30% and 45% removal efficiencies for diclofenac sodium and methylene blue, respectively. Under simulated solar irradiation photocatalytic removal performances of 70% for diclofenac sodium pH 7, and of 97% for methylene blue dye at pH 13, were reached. The membrane photocatalytic activity allows the membrane to avoid pollutant accumulation on its surface, given a self-cleaning property that allows the reuse of at least three cycles under sunlight simulator irradiation. These results suggest the high potential of photocatalytic membranes using suitable and economical materials such as cellulosic compounds and magnesium silicates for water remediation.
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Affiliation(s)
- P García-Ramírez
- Laboratorio de Fotocatálisis y Fotosíntesis Artificial (F&FA), Grupo de Espectroscopía de Materiales Avanzados y Nanoestructurados (GEMANA), Centro de Investigaciones en Óptica, A.C., Lomas del Bosque 115, Lomas del Campestre, León, 37150, Guanajuato, Mexico
| | - L A Diaz-Torres
- Laboratorio de Fotocatálisis y Fotosíntesis Artificial (F&FA), Grupo de Espectroscopía de Materiales Avanzados y Nanoestructurados (GEMANA), Centro de Investigaciones en Óptica, A.C., Lomas del Bosque 115, Lomas del Campestre, León, 37150, Guanajuato, Mexico
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García-Ramírez P, Ramírez-Morales E, Solis Cortazar JC, Sirés I, Silva-Martínez S. Influence of ruthenium doping on UV- and visible-light photoelectrocatalytic color removal from dye solutions using a TiO 2 nanotube array photoanode. Chemosphere 2021; 267:128925. [PMID: 33213874 DOI: 10.1016/j.chemosphere.2020.128925] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/21/2020] [Accepted: 11/06/2020] [Indexed: 06/11/2023]
Abstract
The photocatalytic activity of TiO2 anodes was enhanced by synthesizing Ru-doped Ti|TiO2 nanotube arrays. Such photoanodes were fabricated via Ti anodization followed by Ru impregnation and annealing. The X-ray diffractograms revealed that anatase was the main TiO2 phase, while rutile was slightly present in all samples. Scanning electron microscopy evidenced a uniform morphology in all samples, with nanotube diameter ranging from 60 to 120 nm. The bias potential for the photoelectrochemical (PEC) treatment was selected from the electrochemical characterization of each electrode, made via linear sweep voltammetry. All the Ru-doped TiO2 nanotube array photoanodes showed a peak photocurrent (PP) and a saturation photocurrent (SP) upon their illumination with UV or visible light. In contrast, the undoped TiO2 nanotubes only showed the SP, which was higher than that reached with the Ru-doped photoanodes using UV light. An exception was the Ru(0.15 wt%)-doped TiO2, whose SP was comparable under visible light. Using that anode, the activity enhancement during the PEC treatment of a Terasil Blue dye solution at Ebias(PP) was much higher than that attained at Ebias(SP). The percentage of color removal at 120 min with the Ru(0.15 wt%)-doped TiO2 was 98% and 55% in PEC with UV and visible light, respectively, being much greater than 82% and 28% achieved in photocatalysis. The moderate visible-light photoactivity of the Ru-doped TiO2 nanotube arrays suggests their convenience to work under solar PEC conditions, aiming at using a large portion of the solar spectrum.
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Affiliation(s)
- Patricia García-Ramírez
- Posgrado de Doctorado en Ingeniería y Ciencias Aplicadas, Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma Del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos, C.P. 62209, Mexico
| | - Erik Ramírez-Morales
- División Académica de Ingeniería y Arquitectura, Universidad Juárez Autónoma de Tabasco, Av. Universidad S/N, Col. Magisterial, C.P. 86040, Villahermosa, Tabasco, Mexico
| | - Juan Carlos Solis Cortazar
- Posgrado en Ciencias en Ingeniería, Universidad Juárez Autónoma de Tabasco, Av. Universidad S/N, Col. Magisterial, C.P. 86040, Villahermosa, Tabasco, Mexico
| | - Ignasi Sirés
- Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí I Franquès 1-11, 08028, Barcelona, Spain.
| | - Susana Silva-Martínez
- Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma Del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, C.P. 62209, Cuernavaca, Morelos, Mexico.
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Vicente C, Arriazu E, Martínez-Balsalobre E, Peris I, Marcotegui N, García-Ramírez P, Pippa R, Rabal O, Oyarzábal J, Guruceaga E, Prósper F, Mateos MC, Cayuela ML, Odero MD. A novel FTY720 analogue targets SET-PP2A interaction and inhibits growth of acute myeloid leukemia cells without inducing cardiac toxicity. Cancer Lett 2020; 468:1-13. [DOI: 10.1016/j.canlet.2019.10.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 09/30/2019] [Accepted: 10/01/2019] [Indexed: 10/25/2022]
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Rodríguez-Arbolí E, Márquez-Malaver FJ, Rodríguez-Torres N, Caballero-Velázquez T, Escamilla-Gómez V, Calderón-Cabrera C, Falantes-González JF, Solé-Rodríguez M, García-Ramírez P, Moya-Arnao M, Carreras E, Espigado-Tocino I, Pérez-Simón JA. Allocation to Matched Related or Unrelated Donor Results in Similar Clinical Outcomes without Increased Risk of Failure to Proceed to Transplant among Patients with Acute Myeloid Leukemia: A Retrospective Analysis from the Time of Transplant Approval. Biol Blood Marrow Transplant 2018; 25:183-190. [PMID: 30153492 DOI: 10.1016/j.bbmt.2018.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 08/19/2018] [Indexed: 11/30/2022]
Abstract
Clinical outcomes after allogeneic hematopoietic stem cell transplantation (allo-SCT) from unrelated donors (URDs) approach those of matched related donor (MRD) transplants in patients with acute myeloid leukemia (AML). Yet, available data fail to account for differences in pretransplantation outcomes between these donor selection strategies. In this regard, URD allo-HSCT is associated with longer waiting times to transplantation, potentially resulting in higher probabilities of failure to reach transplant. We retrospectively analyzed 108 AML patients accepted for first allo-HSCT from the time of approval to proceed to transplant. Fifty-eight (54%) patients were initially allocated to MRD, while URD search was initiated in 50 (46%) patients. Time to transplant was longer in patients allocated to a URD when compared with patients assigned to an MRD (median 142 days versus 100 days; p < .001). Forty-three of 58 (74%) patients in the MRD group and 35 of 50 (70%) patients in the URD group underwent transplantation (odds ratio [OR], 1.22; p = .63). Advanced disease status at the time of allo-HSCT approval was the only predictor of failure to reach transplantation in the multivariate analysis (OR, 4.78; p = .001). Disease progression was the most common cause of failure to reach allo-HSCT (66.7%) in both the MRD and URD groups. With a median follow-up from transplantation of 14.5 (interquartile range, 5 to 29) months, the 2-year estimate of overall survival (OS) from allo-HSCT was 46% in the MRD group and 57% in the URD group (p = .54). There were no differences in OS according to donor type allocation in the multivariate analysis (hazard ratio, 1.01; p = .83). When including patients from the time of transplant approval, 2-year OS was 39% in the MRD group versus 42% in the URD group. Our study suggests that allocation of AML patients to URDs may result in comparable clinical outcomes to MRD assignment without a significant increase in the risk of failure to reach transplant.
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Affiliation(s)
- Eduardo Rodríguez-Arbolí
- Department of Hematology, Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla, Universidad de Sevilla, Seville, Spain
| | - Francisco José Márquez-Malaver
- Department of Hematology, Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla, Universidad de Sevilla, Seville, Spain
| | - Nancy Rodríguez-Torres
- Department of Hematology, Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla, Universidad de Sevilla, Seville, Spain
| | - Teresa Caballero-Velázquez
- Department of Hematology, Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla, Universidad de Sevilla, Seville, Spain
| | - Virginia Escamilla-Gómez
- Department of Hematology, Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla, Universidad de Sevilla, Seville, Spain
| | - Cristina Calderón-Cabrera
- Department of Hematology, Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla, Universidad de Sevilla, Seville, Spain
| | - José Francisco Falantes-González
- Department of Hematology, Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla, Universidad de Sevilla, Seville, Spain
| | | | - Patricia García-Ramírez
- Department of Hematology, Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla, Universidad de Sevilla, Seville, Spain
| | - María Moya-Arnao
- Department of Hematology, Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla, Universidad de Sevilla, Seville, Spain
| | - Enric Carreras
- Spanish Bone Marrow Donor Registry, Foundation and Research Institute Josep Carreras Against Leukemia, Barcelona, Spain
| | - Ildefonso Espigado-Tocino
- Department of Hematology, Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla, Universidad de Sevilla, Seville, Spain
| | - José Antonio Pérez-Simón
- Department of Hematology, Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla, Universidad de Sevilla, Seville, Spain.
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