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Flores-López SL, Arenillas A, Mikšík I, Menéndez JA, Montes-Morán MA. Reduced Graphene Oxide Aerogels Cartridges for Solid Phase Extraction of Benzotriazoles. Materials (Basel) 2023; 16:2519. [PMID: 36984399 PMCID: PMC10052701 DOI: 10.3390/ma16062519] [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] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/15/2023] [Accepted: 03/20/2023] [Indexed: 06/18/2023]
Abstract
UV-benzotriazoles have been identified as water micropollutants that cause serious problems for human health and the environment. Their low concentration in water bodies complicates their detection by direct water analysis, slowing the corrective actions to avoid bioaccumulation. In this regard, the use of graphene-based materials with a high affinity for non-polar molecules has been demonstrated to be a potential tool for the optimal separation and concentration of this type of molecules in solid phase extraction (SPE) processes. This work evaluates the potential of novel reduced graphene oxide aerogels (rGO) as extractants of mixtures of three UV-benzotriazoles in water at low concentrations. These rGO aerogels incorporate graphenic domains into a tough structure of polymeric chains by adding graphene oxide during the synthesis of resorcinol-formaldehyde gels. Aerogels with a different content and ordering of graphenic domains were obtained and characterized using Raman, XRD, SEM and nitrogen adsorption isotherms (-196 °C). The rGO aerogels that performed better as solid phase extractants were those containing 60% rGO. Aerogels with lower rGO contents (40%) required a high-temperature (2000 °C) treatment to render competitive results. The SPE methodology using selected rGO aerogels was optimized by varying the elution solvent, elution time and volume. The best performances, i.e., recoveries of 80-100% and enrichment factors of 12.5-50, were accomplished when using 0.8 mL of tetrahydrofuran (THF) as an elution solvent. As a result, a fast (10 min) and simple extraction method of UV-benzotriazoles in water was attained, achieving a detection limit of 1 ng mL-1. Selected aerogels were finally tested for the SPE of spiked samples of river waters, showing a similar performance to that observed with synthetic mixtures.
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Affiliation(s)
- Samantha L. Flores-López
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe, 26, 33011 Oviedo, Spain
| | - Ana Arenillas
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe, 26, 33011 Oviedo, Spain
| | - Ivan Mikšík
- Institute of Physiology, The Czech Academy of Sciences, 142 20 Prague, Czech Republic
| | - J. Angel Menéndez
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe, 26, 33011 Oviedo, Spain
| | - Miguel A. Montes-Morán
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe, 26, 33011 Oviedo, Spain
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Acosta-Herrera AA, Hernández-Montoya V, Tovar-Gómez R, Pérez-Cruz MA, Montes-Morán MA, Rangel-Vázquez NA, Cervantes FJ. Water reclamation from anodizing wastewaters by removing reactive silica with adsorption and precipitation methods. J Environ Manage 2023; 326:116683. [PMID: 36370610 DOI: 10.1016/j.jenvman.2022.116683] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 10/30/2022] [Accepted: 10/31/2022] [Indexed: 06/16/2023]
Abstract
Water stress is a current environmental menace mainly driven by over exploitation of aquifers, which is triggering poor water quality with high concentration of minerals in extracted groundwater. Particularly, silica is widespread in natural water supplies due to weathering processes of silicates occurring in contact with water, light, air, and other factors. However, due to groundwater over extraction the concentration of silica has increased during the last years in aquifer reservoirs from Aguascalientes State (México). In this context, it is very important to note that the removal of silica compounds from water is challenging and different methods can be used to avoid embedding problems in different industries. In the present work, the removal of reactive silica from synthetic solutions as well as from real wastewaters from an industrial anodizing process was studied using adsorption and chemical precipitation methods. Twelve commercial materials of different nature were used for adsorption tests, while seven precipitant agents were applied in the precipitation experiments. Adsorption tests were performed in batch systems with constant stirring at 30 °C and at different pH values (7 and 9). Precipitation experiments were carried out in batch systems and the best conditions for silica removal were found using an L9 orthogonal array of the Taguchi method employing molar ratio, pH of wastewater, stirring time and temperature as experimental factors. Adsorption results showed that Ferrolox (Iron (III) hydroxide-base adsorbent) was the most efficient sorbent for reactive silica removal from synthetic solutions and the anodizing wastewater. Also, the reactive silica adsorption was higher at pH 9 as compared to that measured at pH 7 and the adsorbed quantity at pH 9 was 16.22 and 11.25 mg/g for the synthetic solution and anodizing wastewater, respectively. According to molecular simulation, the main interaction between Ferrolox and silica species was related to the formation of hydroxo-complexes and to the interaction of Fe with oxygen of silica species. Additionally, magnesium chloride was the best precipitating reagent for reactive silica achieving up to 87% removal. According to ANOVA analysis of Taguchi method, pH was the most influential factor during the precipitation of reactive silica with a variance value of 81.42, while values lower than 3 were obtained for the rest of parameters. Overall, the present work is reporting for the first time the removal of reactive silica from anodizing wastewaters with promising results that can be implemented at full scale for water reclamation, which may significantly contribute to manage water reservoir in the region sustainably.
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Affiliation(s)
- Andrea Alejandra Acosta-Herrera
- TecNM/Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote. C.P. 20256, Aguascalientes, Ags, Mexico
| | - Virginia Hernández-Montoya
- TecNM/Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote. C.P. 20256, Aguascalientes, Ags, Mexico.
| | - Rigoberto Tovar-Gómez
- TecNM/Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote. C.P. 20256, Aguascalientes, Ags, Mexico
| | - María A Pérez-Cruz
- Facultad de Ciencias Químicas, Universidad Autónoma de Puebla, Av. San Claudio y 18 Sur, 72570, Puebla, Pue, Mexico
| | - Miguel A Montes-Morán
- Instituto de Ciencia y Tecnología Del Carbono, INCAR-CSIC, Francisco Pintado Fe 26 E-33011, Oviedo, Spain
| | - Norma A Rangel-Vázquez
- TecNM/Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote. C.P. 20256, Aguascalientes, Ags, Mexico
| | - Francisco J Cervantes
- Laboratory for Research on Advanced Processes for Water Treatment, Engineering Institute, Campus Juriquilla, Universidad Nacional Autónoma de México (UNAM), Blvd. Juriquilla 3001, 76230, Querétaro, Mexico
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Ramírez-Montoya LA, Montes-Morán MA, Rangel-Mendez JR, Cervantes FJ. Enhanced anaerobic treatment of synthetic protein-rich wastewater promoted by organic xerogels. Biodegradation 2022; 33:255-265. [PMID: 35477824 DOI: 10.1007/s10532-022-09984-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 04/13/2022] [Indexed: 11/02/2022]
Abstract
Carbon-based materials have been shown to enhance anaerobic digestion processes by promoting direct interspecies electron transfer in methanogenic consortia. However, little is known on their effects during the treatment of complex substrates, such as those derived from protein-rich wastewaters. Here, organic xerogels (OX) are tested, for the first time, as accelerators of the methanogenic activity of an anaerobic consortium treating a synthetic protein-rich wastewater. Three OX with distinct pore size distribution (10 and 1000 nm for OX-10 and OX-1000, respectively) and structural conformation (graphene oxide integration into OX-10-GO polymeric matrix) were synthesized. OX-1000 promoted the highest methane production rate (5.21 mL/g*h, 13.5% increase with respect to the control incubated without OX) among the synthesized OX. Additionally, batch bioreactors amended with OX achieved higher chemical oxygen demand (COD) removal (up to 88%) as compared to the control, which only showed 50% of COD removal. Interestingly, amendment of bioreactors with OX also triggered the production of medium-chain fatty acids, including caprylate and caproate. Moreover, OX decreased the accumulation of ammonium, derived from proteins hydrolysis, partly explained by their adsorption capacities, and probably involving their electron-accepting capacity promoting anaerobic ammonium oxidation. This is the first time that OX were successfully applied as methanogenic accelerators for the anaerobic treatment of synthetic protein-rich wastewater, increasing the methane production rate and COD removal as well as triggering the production of medium chain fatty acids and attenuating the accumulation of ammonium. Therefore, OX are proposed as suitable materials to boost the efficiency of anaerobic systems to treat complex industrial wastewaters.
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Affiliation(s)
- Luis A Ramírez-Montoya
- Laboratory for Research on Advanced Processes for Water Treatment, Engineering Institute, Universidad Nacional Autónoma de México (UNAM), Campus Juriquilla, Blvd. Juriquilla 3001, Querétaro, 76230, Mexico
| | - Miguel A Montes-Morán
- Instituto de Ciencia y Tecnología del Carbono (INCAR-CSIC), Francisco Pintado Fe 26, 33011, Oviedo, Spain
| | - J Rene Rangel-Mendez
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), Camino a la Presa San José 2055, Col. Lomas 4a. Sección, San Luis Potosí, 78216, SLP, Mexico
| | - Francisco J Cervantes
- Laboratory for Research on Advanced Processes for Water Treatment, Engineering Institute, Universidad Nacional Autónoma de México (UNAM), Campus Juriquilla, Blvd. Juriquilla 3001, Querétaro, 76230, Mexico.
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Martínez-Lázaro A, Ramírez-Montoya LA, Ledesma-García J, Montes-Morán MA, Gurrola MP, Menéndez JA, Arenillas A, Arriaga LG. Facile Synthesis of Unsupported Pd Aerogel for High Performance Formic Acid Microfluidic Fuel Cell. Materials (Basel) 2022; 15:ma15041422. [PMID: 35207965 PMCID: PMC8874856 DOI: 10.3390/ma15041422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 02/01/2022] [Accepted: 02/10/2022] [Indexed: 01/19/2023]
Abstract
In this work, unsupported Pd aerogel catalysts were synthesized for the very first time by using microwaves as a heating source followed by a lyophilization drying process and used towards formic acid electro-oxidation in a microfluidic fuel cell. Aerogels were also made by heating in a conventional oven to evaluate the microwave effect during the synthesis process of the unsupported Pd aerogels. The performance of the catalysts obtained by means of microwave heating favored the formic acid electro-oxidation with H2SO4 as the electrolyte. The aerogels' performance as anodic catalysts was carried out in a microfluidic fuel cell, giving power densities of up to 14 mW cm-2 when using mass loads of only 0.1 mg on a 0.019 cm2 electrode surface. The power densities of the aerogels obtained by microwave heating gave a performance superior to the resultant aerogel prepared using conventional heating and even better than a commercial Pd/C catalyst.
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Affiliation(s)
- Alejandra Martínez-Lázaro
- División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Santiago de Queretaro 76010, Mexico; (A.M.-L.); (J.L.-G.)
| | - Luis A. Ramírez-Montoya
- Laboratory for Research on Advanced Processes for Water Treatment, Engineering Institute, Universidad Nacional Autónoma de México (UNAM), Blvd. Juriquilla 3001, Santiago de Queretaro 76230, Mexico;
| | - Janet Ledesma-García
- División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Santiago de Queretaro 76010, Mexico; (A.M.-L.); (J.L.-G.)
| | - Miguel A. Montes-Morán
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC. Francisco Pintado Fe, 33011 Oviedo 26., Spain; (M.A.M.-M.); (J.A.M.)
| | - Mayra P. Gurrola
- CONACYT-Tecnológico Nacional de México/Instituto Tecnológico de Chetumal. Av. Insurgentes 330, David Gustavo Gutiérrez, Chetumal 77013, Mexico;
| | - J. Angel Menéndez
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC. Francisco Pintado Fe, 33011 Oviedo 26., Spain; (M.A.M.-M.); (J.A.M.)
| | - Ana Arenillas
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC. Francisco Pintado Fe, 33011 Oviedo 26., Spain; (M.A.M.-M.); (J.A.M.)
- Correspondence: (A.A.); (L.G.A.)
| | - Luis G. Arriaga
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Santiago de Queretaro 76703, Mexico
- Correspondence: (A.A.); (L.G.A.)
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Dos Santos-Gómez L, García JR, Montes-Morán MA, Menéndez JA, García-Granda S, Arenillas A. Ultralight-Weight Graphene Aerogels with Extremely High Electrical Conductivity. Small 2021; 17:e2103407. [PMID: 34510733 DOI: 10.1002/smll.202103407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 07/21/2021] [Indexed: 06/13/2023]
Abstract
The integration of 2D graphene sheets into a porous and macroscopic structure is extremely attractive for application in several electrochemical fields. In this regard, for the first time, the synthesis of 3D graphene aerogels is reported by using a rapid, easy, cost-effective, and scalable at industrial level methodology. These aerogels integrate the intrinsic properties of graphene with a high pore volume. To achieve this ultraporous graphene network, resorcinol/formaldehyde polymer with controllable porosity is employed as a binder and a cross-linker material, and a graphene oxide solution provides the graphene building blocks. Two series of materials with and without catalyst for resorcinol/formaldehyde reaction and with different synthesis conditions and graphene contents are studied. The resulting graphene aerogels present low density, large macroporosity, and electrical conductivity values as high as 852 S m-1 , with 97.58% of porosity, which is the highest value of electrical conductivity reported so far in the literature for ultralight-weight graphene aerogels.
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Affiliation(s)
- Lucía Dos Santos-Gómez
- Department of Physical and Analytical Chemistry, Avda. Julián Clavería 8, Campus de El Cristo, Oviedo University-CINN-CSIC, Oviedo, 33006, Spain
| | - José R García
- Department of Organic and Inorganic Chemistry, Oviedo University-CINN-CSIC, Oviedo, 33006, Spain
| | - Miguel A Montes-Morán
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe 26, Oviedo, 33011, Spain
| | - José Angel Menéndez
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe 26, Oviedo, 33011, Spain
| | - Santiago García-Granda
- Department of Physical and Analytical Chemistry, Avda. Julián Clavería 8, Campus de El Cristo, Oviedo University-CINN-CSIC, Oviedo, 33006, Spain
| | - Ana Arenillas
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe 26, Oviedo, 33011, Spain
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Acosta-Herrera AA, Hernández-Montoya V, Castillo-Borja F, Pérez-Cruz MA, Montes-Morán MA, Cervantes FJ. Competitive adsorption of pollutants from anodizing wastewaters to promote water reuse. J Environ Manage 2021; 293:112877. [PMID: 34098353 DOI: 10.1016/j.jenvman.2021.112877] [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: 01/15/2021] [Revised: 05/11/2021] [Accepted: 05/21/2021] [Indexed: 06/12/2023]
Abstract
Anodizing wastewater contains principally phosphate (PO43-) anions according to previous studies, but with the purpose to promote water reuse in this type of industry, a complete characterization of wastewater was made to remove other anions and cations also present in significant concentration. Particularly, the adsorption of sodium (Na+), potassium (K+), fluoride (F-), sulfate (SO42-) and phosphate (PO43-) was studied using different sorbents such as: coconut shell activated carbon, bone char, bituminous coal activated carbon, natural zeolite, silica, anionic and cationic exchange resins, a coated manganese-calcium zeolite, coconut shell activated carbon containing iron and iron hydroxide. All sorbents were characterized using FT-IR spectroscopy, potentiometric titration, nitrogen adsorption isotherms at 77 K, X-ray diffraction and SEM/EDX analysis to study the adsorption mechanism. The adsorption studies were performed in batch systems under constant agitation using both standard solutions of each ion and real anodizing wastewater. Results showed that, in general, the adsorption of all anions and cations is higher when mono-component standard solutions were used, since in the anodizing wastewater all species are competing for the active sites of the adsorbent. Na+ present in anodizing wastewater was efficiently adsorbed on coated manganese-calcium zeolite (20.55 mg/g) and natural zeolite (18.55 mg/g); while K+ was poorly adsorbed on all sorbents (less than 0.20 mg/g). Anions such as F-, SO42- and PO43-, were better adsorbed on the anionic resin (0.17, 45.38 and 2.92 mg/g, respectively), the iron hydroxide (0.14, 7.96 and 2.87 mg/g, respectively) and the bone char (0.34, 8.71 and 0.27 mg/g, respectively). All these results suggest that adsorption is a promising tertiary treatment method to achieve water reuse in the anodizing industry.
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Affiliation(s)
- Andrea Alejandra Acosta-Herrera
- TecNM/Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote, C.P. 20256, Aguascalientes, Ags., Mexico
| | - Virginia Hernández-Montoya
- TecNM/Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote, C.P. 20256, Aguascalientes, Ags., Mexico.
| | - Florianne Castillo-Borja
- TecNM/Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote, C.P. 20256, Aguascalientes, Ags., Mexico
| | - María A Pérez-Cruz
- Facultad de Ciencias Químicas, Universidad Autónoma de Puebla, Apdo. Postal J-55, Puebla, Pue., Mexico
| | - Miguel A Montes-Morán
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe 26, E-33011, Oviedo, Spain
| | - Francisco J Cervantes
- Laboratory for Research on Advanced Processes for Water Treatment, Engineering Institute, Campus Juriquilla, Universidad Nacional Autónoma de México (UNAM), Blvd. Juriquilla 3001, 76230, Querétaro, Mexico
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Pérez Jiménez VA, Hernández-Montoya V, Ramírez-Montoya LA, Castillo-Borja F, Tovar-Gómez R, Montes-Morán MA. Adsorption of impurities from nickel-plating baths using commercial sorbents to reduce wastewater discharges. J Environ Manage 2021; 284:112024. [PMID: 33548751 DOI: 10.1016/j.jenvman.2021.112024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 10/28/2020] [Revised: 01/11/2021] [Accepted: 01/16/2021] [Indexed: 06/12/2023]
Abstract
The presence of moderate concentrations of impurities in the nickel-plating baths generates failures on the coated pieces. This situation entails the necessity of replacing the electroplating bath, which implies the generation of large volumes of wastewater with metallic species and high quantity of sludge. For this reason, the adsorption of the principal impurities of nickel-plating baths of an industry was analyzed in this work. Particularly, the removal of Zn2+ was studied in more detail since the presence of this metal in the baths generates black spots on the coated pieces. Different commercial materials were used as adsorbents and Zn2+ adsorption studies were carried out using both standard solutions and industrial water from the nickel-plating baths. All the adsorption tests were performed in batch systems under constant agitation and the quantification of the impurities was made by ICP-MS analysis. The bone char (BC) was an efficient adsorbent for the removal of the principal impurities of nickel-plating baths. The use of molecular simulation tools helped to understand the preferences of the hydroxyapatite (the principal component of bone char) for different metallic ions present in the industrial waters. According to both the experimental adsorption and molecular simulation results, hydroxyl and phosphate groups of bone char are responsible of the adsorption of impurities of nickel-plating baths.
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Affiliation(s)
- Vanesa Anahi Pérez Jiménez
- TecNM/Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote. C.P. 20256, Aguascalientes, Ags, México
| | - Virginia Hernández-Montoya
- TecNM/Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote. C.P. 20256, Aguascalientes, Ags, México.
| | - Luis A Ramírez-Montoya
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe 26 E-33011, Oviedo, Spain; Laboratory for Research on Advanced Processes for Water Treatment, Instituto de Ingeniería, Unidad Académica Juriquilla, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, 76230, Querétaro, Mexico
| | - Florianne Castillo-Borja
- TecNM/Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote. C.P. 20256, Aguascalientes, Ags, México
| | - Rigoberto Tovar-Gómez
- TecNM/Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote. C.P. 20256, Aguascalientes, Ags, México
| | - Miguel A Montes-Morán
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe 26 E-33011, Oviedo, Spain
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Tamargo-Martínez K, Montes-Morán MA, Martínez-Alonso A, Tascón JMD. Effect of non-oxidative plasma treatments on the surface properties of poly(p-phenylene terephthalamide) (PPTA) and poly(p-phenylene benzobisoxazole) (PBO) fibres as measured by inverse gas chromatography. J Chromatogr A 2020; 1634:461655. [PMID: 33181356 DOI: 10.1016/j.chroma.2020.461655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 06/19/2020] [Revised: 10/22/2020] [Accepted: 10/24/2020] [Indexed: 11/28/2022]
Abstract
It has been shown in previous works that the interfacial adhesion in PPTA- and PBO-epoxy composites can be improved by modifying the surface properties of these high-performance fibres upon exposure to non-oxidative plasma treatments. In this work, the effects developed on both types of polymer surface were examined as a function of treatment gas nature (He or N2) and exposure time (one or four minutes) using inverse gas chromatography at infinite dilution (IGC). From the adsorption of n-alkanes, it has been proved that non-oxidative plasma treatments led to energetically heterogeneous surfaces in the case of PPTA, and to low-energy surfaces in the case of PBO. Nevertheless, it was proved with the 1-min plasma treatments (either under helium or under nitrogen) that chemical reactivity was enhanced on the PBO surface. Such a behaviour was ascribed to the presence of low-molecular weight oxidized materials. The mechanisms involved in surface activation of PPTA were not equivalent under He or N2 exposure. Nitrogen plasma exposure led to a PPTA surface that is chemically reactive as a result of polarity enhancement. Helium plasma-treated PPTA surface was characterized by the presence of branched arrangements that intensified the number of chemical contacts onto reactive sites. Finally, for both fibre sets, if the purpose is to enhance the chemical surface reactivity, it makes no sense to increase the plasma exposure time from 1 to 4 min.
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Affiliation(s)
- K Tamargo-Martínez
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, C/ Francisco Pintado Fe 26, 33011-Oviedo, Spain.
| | - M A Montes-Morán
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, C/ Francisco Pintado Fe 26, 33011-Oviedo, Spain
| | - A Martínez-Alonso
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, C/ Francisco Pintado Fe 26, 33011-Oviedo, Spain.
| | - J M D Tascón
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, C/ Francisco Pintado Fe 26, 33011-Oviedo, Spain
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Flores-López SL, Villanueva SF, Montes-Morán MA, Cruz G, Garrido JJ, Arenillas A. Advantages of microwave-assisted synthesis of silica gels. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125248] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Canal-Rodríguez M, Menéndez JA, Montes-Morán MA, Martín-Gullón I, Parra JB, Arenillas A. The role of conductive additives on the performance of hybrid carbon xerogels as electrodes in aqueous supercapacitors. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.10.189] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Gonzalez-Olmos R, Anfruns A, Aguirre NV, Masaguer V, Concheso A, Montes-Morán MA. Use of by-products from integrated steel plants as catalysts for the removal of trichloroethylene from groundwater. Chemosphere 2018; 213:164-171. [PMID: 30227307 DOI: 10.1016/j.chemosphere.2018.09.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 12/11/2017] [Revised: 08/31/2018] [Accepted: 09/03/2018] [Indexed: 06/08/2023]
Abstract
The removal of tricholoroethylene (TCE) has been investigated in this work through the Fenton-like process using different catalytic materials obtained from metallic by-products of the steel industry. These materials are the slag produced during the transformation of molten pig iron produced in a blast furnace into liquid steel (SLD), the dry particles (or dust) obtained from the bag filters installed in the coking installations to minimize diffuse emissions (POCA) and the dry particles obtained from the liquid sludge from the scrubber (LHA). This study aims to explore the potential of these materials for being used as permeable catalytic barriers to treat groundwater polluted with trichloroethylene (TCE). The wastes used as catalysts were chemically and physically characterized to determine their composition and porosity. The results of this study point out that among the different catalysts used LHA showed the highest catalytic activity to degrade TCE using hydrogen peroxide. Moreover, LHA was the most efficient catalyst using hydrogen peroxide due to its higher stoichiometric efficiency. It is thus concluded that LHA has a high potential to be combined with hydrogen peroxide in permeable catalytic barriers to remove organic compounds from groundwater.
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Affiliation(s)
- Rafael Gonzalez-Olmos
- IQS School of Engineering, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain.
| | - Alba Anfruns
- LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Noelia V Aguirre
- ArcelorMittal Global R&D Asturias, CDT, Apartado 90, 33400 Avilés, Spain
| | - Victoria Masaguer
- ArcelorMittal Global R&D Asturias, CDT, Apartado 90, 33400 Avilés, Spain
| | - Alejandro Concheso
- Instituto Nacional del Carbón, INCAR-CSIC, Francisco Pintado Fe 26, 33011 Oviedo, Spain
| | - Miguel A Montes-Morán
- Instituto Nacional del Carbón, INCAR-CSIC, Francisco Pintado Fe 26, 33011 Oviedo, Spain
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12
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Delgadillo-Velasco L, Hernández-Montoya V, Rangel-Vázquez NA, Cervantes FJ, Montes-Morán MA, Moreno-Virgen MDR. Screening of commercial sorbents for the removal of phosphates from water and modeling by molecular simulation. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.100] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Marbán G, Ramírez-Montoya LA, García H, Menéndez JÁ, Arenillas A, Montes-Morán MA. Load-dependent surface diffusion model for analyzing the kinetics of protein adsorption onto mesoporous materials. J Colloid Interface Sci 2018; 511:27-38. [DOI: 10.1016/j.jcis.2017.09.091] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 09/07/2017] [Accepted: 09/23/2017] [Indexed: 11/28/2022]
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14
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Alonso-Buenaposada ID, Montes-Morán MA, Menéndez JA, Arenillas A. Synthesis of hydrophobic resorcinol–formaldehyde xerogels by grafting with silanes. REACT FUNCT POLYM 2017. [DOI: 10.1016/j.reactfunctpolym.2017.09.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Delgadillo-Velasco L, Hernández-Montoya V, Cervantes FJ, Montes-Morán MA, Lira-Berlanga D. Bone char with antibacterial properties for fluoride removal: Preparation, characterization and water treatment. J Environ Manage 2017; 201:277-285. [PMID: 28675862 DOI: 10.1016/j.jenvman.2017.06.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 03/10/2017] [Revised: 05/15/2017] [Accepted: 06/18/2017] [Indexed: 06/07/2023]
Abstract
In the present work, it was established a new method for the preparation of bone chars with a double purpose, i.e., the removal of fluoride from water and the antibacterial character. These adsorbents were obtained by doping a commercial bone char with Ag using different reagents. The optimal conditions for the enrichment with silver were established by following the Taguchi method and using as response variable the removal of fluoride from water. Optimal bone chars were thus prepared and they were characterized using FT-IR spectroscopy, SEM/EDX analysis, adsorption isotherms of N2 at -196 °C and X-ray diffraction. All adsorbents were used in the removal of fluoride from water and the antibacterial character was assessed using the technique of total viable count employing standard solutions of Escherichia coli and drinking water. Results clearly indicated that doping of bone chars with silver provides with suitable antibacterial properties, however the fluoride adsorption capacity was not affected by the presence of Ag° on the carbon surface.
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Affiliation(s)
- Lorena Delgadillo-Velasco
- Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote., C.P. 20256, Aguascalientes, Ags., Mexico
| | - Virginia Hernández-Montoya
- Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote., C.P. 20256, Aguascalientes, Ags., Mexico.
| | - Francisco J Cervantes
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICyT), Camino a la Presa San José 2055, Col. Lomas 4a. Sección, San Luis Potosí, SLP, 78216, Mexico
| | | | - Diana Lira-Berlanga
- Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote., C.P. 20256, Aguascalientes, Ags., Mexico
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16
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Beneroso D, Bermúdez JM, Montes-Morán MA, Arenillas A, Menéndez JA. Microwave-induced cracking of pyrolytic tars coupled to microwave pyrolysis for syngas production. Bioresour Technol 2016; 218:687-691. [PMID: 27420155 DOI: 10.1016/j.biortech.2016.07.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 05/19/2016] [Revised: 07/04/2016] [Accepted: 07/05/2016] [Indexed: 06/06/2023]
Abstract
Herein a new process is proposed to produce a syngas-rich gas fraction (>80vol% H2+CO) from biowaste based on microwave heating within two differentiated steps in order to avoid tars production. The first step consists of the microwave pyrolysis of biowaste induced by a char-based susceptor at 400-800°C; tars, char and syngas-rich gas fractions being produced. The tars are then fed into the second step where a portion of the char from the first step is used as a bed material in a 0.3:1wt% ratio. This bed is heated up by microwaves up to 800°C, allowing thermal cracking of tars and additional syngas (>90vol% H2+CO) being then produced. This new concept arises as an alternative technology to the gasification of biowastes for producing syngas with no need for catalysts or gasifying reagents to minimise tars production.
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Affiliation(s)
- D Beneroso
- Microwave Process Engineering Research Group, Faculty of Engineering, The University of Nottingham, NG7 2RD Nottingham, United Kingdom
| | - J M Bermúdez
- Chemical Engineering Department, Imperial College London, SW7 2AZ London, United Kingdom
| | - M A Montes-Morán
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain
| | - A Arenillas
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain
| | - J A Menéndez
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain.
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17
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Ramírez-Montoya LA, Hernández-Montoya V, Montes-Morán MA, Cervantes FJ. Correlation between mesopore volume of carbon supports and the immobilization of laccase from Trametes versicolor for the decolorization of Acid Orange 7. J Environ Manage 2015; 162:206-214. [PMID: 26241936 DOI: 10.1016/j.jenvman.2015.07.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 01/09/2015] [Revised: 07/15/2015] [Accepted: 07/16/2015] [Indexed: 06/04/2023]
Abstract
Immobilization of laccase from Trametes versicolor was carried out using carbon supports prepared from different lignocellulosic wastes. Enzymes were immobilized by physical adsorption. Taguchi methodology was selected for the design of experiments regarding the preparation of the carbon materials, which included the use of activating agents for the promotion of mesoporosity. A good correlation between the mesopore volumes of the carbon supports and the corresponding laccase loadings attained was observed. Specifically, the chemical activation of pecan nut shell with FeCl3 led to a highly mesoporous material that also behaved as the most efficient support for the immobilization of laccase. This particular laccase/carbon support system was used as biocatalyst for the decolorization of aqueous solutions containing Acid Orange 7. Mass spectrometry coupled to a liquid chromatograph allowed us to identify the products of the dye degradation.
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Affiliation(s)
- Luis A Ramírez-Montoya
- Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote., C.P. 20256, Aguascalientes, Ags., Mexico
| | - Virginia Hernández-Montoya
- Instituto Tecnológico de Aguascalientes, Av. Adolfo López Mateos No. 1801 Ote., C.P. 20256, Aguascalientes, Ags., Mexico.
| | | | - Francisco J Cervantes
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICyT), Camino a la Presa San José 2055, Col. Lomas 4ª, Sección, San Luis Potosí, SLP, 78216 Mexico
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18
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Cabrera-Codony A, Montes-Morán MA, Sánchez-Polo M, Martín MJ, Gonzalez-Olmos R. Biogas upgrading: optimal activated carbon properties for siloxane removal. Environ Sci Technol 2014; 48:7187-7195. [PMID: 24837651 DOI: 10.1021/es501274a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A total of 12 commercial activated carbons (ACs) have been tested for the removal of octamethylcyclotetrasiloxane (D4) in dynamic adsorption experiments using different carrier gases and D4 concentrations. Characterization of the ACs included several physical and chemical techniques. The D4 adsorption capacities were strongly related with the textural development of the ACs. Results showed that the optimum adsorbent for D4 is a wood-based chemically activated carbon, which rendered an adsorption capacity of 1732 ± 93 mg g(-1) using 1000 ppm (v/v) of D4 with dry N2 as the carrier gas. When the concentration of D4 was lowered to typical values found in biogas, the adsorption capacity was halved. The presence of major biogas compounds (i.e., CH4 and CO2) and humidity further reduced the D4 adsorption capacity. The polymerization of D4 over the surface of all ACs was found to be relevant after prolonged contact times. The extent of this phenomenon, which may negatively affect the thermal regeneration of the AC, correlated reasonably well with the presence of phenolic and carboxylic groups on the carbon surfaces.
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Affiliation(s)
- Alba Cabrera-Codony
- LEQUIA, Institute of the Environment. University of Girona , Campus Montilivi, 17071 Girona, Catalonia, Spain
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19
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Anfruns A, Montes-Morán MA, Gonzalez-Olmos R, Martin MJ. H2O2-based oxidation processes for the regeneration of activated carbons saturated with volatile organic compounds of different polarity. Chemosphere 2013; 91:48-54. [PMID: 23273734 DOI: 10.1016/j.chemosphere.2012.11.068] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 11/27/2012] [Accepted: 11/28/2012] [Indexed: 06/01/2023]
Abstract
This study reports the sequential regeneration treatment of activated carbons (ACs) saturated with volatile organic compounds (VOCs) of different polarity using H(2)O(2) as oxidizing agent. In this process, VOCs were adsorbed onto the AC and further oxidized by H(2)O(2). A commercial AC was selected and saturated with three different VOCs: two non-polar and hydrophobic VOCs, toluene and limonene, and one polar and hydrophilic VOC, methyl ethyl ketone (MEK). The saturated AC was regenerated with H(2)O(2), and the Fenton reagent for comparison. It was found that regeneration efficiencies obtained with the H(2)O(2) treatment were equal to or even higher than those obtained with the Fenton treatment. The fate of the pre-adsorbed VOCs, once the regeneration process is completed was studied. It was found that this regeneration treatment is limited for non-polar VOCs such as toluene and limonene, as they tend to remain adsorbed onto the ACs after regeneration treatment. Contrarily, MEK tend to be transferred to the bulk phase and react with the generated oxidant species.
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Affiliation(s)
- Alba Anfruns
- LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain.
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20
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Montes-Morán MA, Concheso A, Canals-Batlle C, Aguirre NV, Ania CO, Martín MJ, Masaguer V. Linz-Donawitz steel slag for the removal of hydrogen sulfide at room temperature. Environ Sci Technol 2012; 46:8992-8997. [PMID: 22823418 DOI: 10.1021/es301257c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Slags collected from the basic oxygen furnaces of two Linz-Donawitz steel making plants were tested as adsorbents for H(2)S removal at room temperature (298 K). Two different particle size fractions, namely <212 and 212-500 μm, were selected from the original slag samples. Dynamic adsorption tests were carried out using a column-bed configuration and retention capacities were calculated after bed exhaustion. Retention capacities as high as 180 mg of H(2)S g(-1) of slag were attained, in spite of the very low specific surface area of the steel slags. As expected, humidity played a crucial role in the removal of H(2)S. Particle size had also an important effect on the capacity of the adsorption beds. Analysis of the exhausted slags revealed considerable amounts of elemental sulfur on the surface of the particles. Sulfates were also found on the exhausted slags, especially on the 212-500 μm size fractions. The characterization of the slags prior and after the H(2)S adsorption experiments allowed us to postulate plausible mechanisms to understand the outstanding capacity of these steel byproduct for H(2)S adsorption.
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21
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Tovar-Gómez R, Rivera-Ramírez DA, Hernández-Montoya V, Bonilla-Petriciolet A, Durán-Valle CJ, Montes-Morán MA. Synergic adsorption in the simultaneous removal of acid blue 25 and heavy metals from water using a Ca(PO3)2-modified carbon. J Hazard Mater 2012; 199-200:290-300. [PMID: 22118844 DOI: 10.1016/j.jhazmat.2011.11.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 11/02/2011] [Accepted: 11/03/2011] [Indexed: 05/31/2023]
Abstract
We report the simultaneous adsorption of acid blue 25 dye (AB25) and heavy metals (Zn(2+), Ni(2+) and Cd(2+)) on a low-cost activated carbon, whose adsorption properties have been improved via a surface chemistry modification using a calcium solution extracted from egg shell wastes. Specifically, we have studied the removal performance of this adsorbent using the binary aqueous systems: AB25-Cd(2+), AB25-Ni(2+) and AB25-Zn(2+). Multi-component kinetic and equilibrium experiments have been performed and used to identify and characterize the synergic adsorption in the simultaneous removal of these pollutants. Our results show that the presence of AB25 significantly favors the removal of heavy metals and may increase the adsorption capacities up to six times with respect to the results obtained using the mono-cationic metallic systems, while the adsorption capacities of AB25 are not affected by the presence of metallic ions. It appears that this anionic dye favors the electrostatic interactions with heavy metals or may create new specific sites for adsorption process. In particular, heavy metals may interact with the -SO(3)(-) group of AB25 and to the hydroxyl and phosphoric groups of this adsorbent. A response surface methodology model has been successfully used for fitting multi-component adsorption data.
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Affiliation(s)
- R Tovar-Gómez
- Instituto Tecnologico de Aguacalientes, Departamento de Ing. Quimica, Av. Lopez Mateos 1801, Aguascalientes 20256, Mexico
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22
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Guijarro-Aldaco A, Hernández-Montoya V, Bonilla-Petriciolet A, Montes-Morán MA, Mendoza-Castillo DI. Improving the Adsorption of Heavy Metals from Water Using Commercial Carbons Modified with Egg Shell Wastes. Ind Eng Chem Res 2011. [DOI: 10.1021/ie2006627] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alejandro Guijarro-Aldaco
- Instituto Tecnológico de Aguascalientes, Adolfo López Matéos 1801 Ote., Fracc. Bonagens, Aguascalientes, México, 20256
| | - Virginia Hernández-Montoya
- Instituto Tecnológico de Aguascalientes, Adolfo López Matéos 1801 Ote., Fracc. Bonagens, Aguascalientes, México, 20256
| | - Adrian Bonilla-Petriciolet
- Instituto Tecnológico de Aguascalientes, Adolfo López Matéos 1801 Ote., Fracc. Bonagens, Aguascalientes, México, 20256
| | | | - Didilia I. Mendoza-Castillo
- Instituto Tecnológico de Aguascalientes, Adolfo López Matéos 1801 Ote., Fracc. Bonagens, Aguascalientes, México, 20256
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23
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Aguirre NV, Vivas BP, Montes-Morán MA, Ania CO. Adsorption of Thiocyanate Anions from Aqueous Solution onto Adsorbents of Various Origin. ADSORPT SCI TECHNOL 2010. [DOI: 10.1260/0263-6174.28.8-9.705] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Noelia V. Aguirre
- Instituto Nacional del Carbón (INCAR-CSIC), C/Francisco Pintado Fe, 26, 33011 Oviedo, Spain
| | | | - Miguel A. Montes-Morán
- Instituto Nacional del Carbón (INCAR-CSIC), C/Francisco Pintado Fe, 26, 33011 Oviedo, Spain
| | - Conchi O. Ania
- Instituto Nacional del Carbón (INCAR-CSIC), C/Francisco Pintado Fe, 26, 33011 Oviedo, Spain
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24
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Anfruns A, Canals-Batlle C, Ros A, Lillo-Ródenas MA, Linares-Solano A, Fuente E, Montes-Morán MA, Martin MJ. Removal of odour-causing compounds using carbonaceous adsorbents/catalysts prepared from sewage sludge. Water Sci Technol 2009; 59:1371-1376. [PMID: 19381003 DOI: 10.2166/wst.2009.126] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This paper discusses H(2)S, NH(3) and VOCs removal by sewage-sludge-derived materials with outstanding chemical and textural properties. These materials were obtained from different precursors using different chemical and thermal treatments. Results show that the H(2)S removal process entailed a catalytic conversion of H(2)S to S or SO(4) (2-) species. On the other hand, adsorption is the main mechanism governing the performance of sludge-based materials for NH(3) and VOCs. Retention capacities (x/M values) obtained for some of the sludge-based adsorbents/catalysts are similar to those obtained with commercial activated carbons selected as reference materials.
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Affiliation(s)
- A Anfruns
- Laboratori d'Enginyeria Química i Ambiental (LEQUIA), Universitat de Girona, Facultat de Ciències, Campus Montilivi s/n E- 17071, Girona, Spain.
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25
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Ros A, Lillo-Ródenas MA, Canals-Batlle C, Fuente E, Montes-Morán MA, Martin MJ, Linares-Solano A. A new generation of sludge-based adsorbents for H2S abatement at room temperature. Environ Sci Technol 2007; 41:4375-81. [PMID: 17626439 DOI: 10.1021/es062358m] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The present paper discusses H2S removal by a new generation of sewage-sludge-derived materials which are characterized by their outstanding textural properties when compared to previous materials obtained by pyrolysis and/or activation of similar precursors. Alkaline hydroxide activation was used to prepare adsorbents/catalysts covering a wide range of porosities (SBET values from 10 to 1300 m2 g(-1)). Our results outline that textural properties are important for H2S abatement. However, not only highly porous sorbents, but also a high metallic content and a basic pH of these materials are required to achieve good performances. Proper combinations of textural properties and alkalinity render superior performances with retention values (x/M) as high as 456 mg of H2S removed per g of material. These retention capacities outperform previously published data for sewage-sludge derived materials and those achieved with commercial materials (including some activated carbons). Sulfur titration shows that most H2S is removed in the form of elemental sulfur, especially in the sewage/NaOH materials.
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Affiliation(s)
- Anna Ros
- Laboratori d'Enginyeria Química i Ambiental (LEQUIA), Institut de Medi Ambient, Facultat de Ciències, Universitat de Girona, E-17071 Girona, Spain
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26
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Ros A, Lillo-Ródenas MA, Fuente E, Montes-Morán MA, Martín MJ, Linares-Solano A. High surface area materials prepared from sewage sludge-based precursors. Chemosphere 2006; 65:132-40. [PMID: 16564562 DOI: 10.1016/j.chemosphere.2006.02.017] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2005] [Revised: 02/10/2006] [Accepted: 02/13/2006] [Indexed: 05/08/2023]
Abstract
This paper focuses on physical activation (CO2) and chemical activation (H3PO4, NaOH and KOH) of sewage sludge-based precursors. Our results show that (i) a simple acid washing treatment leads to a significant increase in the adsorption capacity of some precursors; (ii) under the experimental conditions tested, CO2 physical activation and chemical activation with H3PO4 were ineffective for an efficient porosity development and (iii) choosing an appropriate protocol, it is possible to obtain highly porous materials (700-1700 m2 g(-1)) by chemical activation of sludge-based precursors with alkaline hydroxides. The efficiency of the chemical activation with NaOH or KOH is very much influenced by the method used for mixing the activating agent and the precursor. The BET values of the materials obtained when physically mixing ground hydroxides with the precursor almost doubled the values obtained if other mixing methods are employed. Increasing the hydroxide:precursor ratio leads to an enhancement of the adsorption capacity of the adsorbents, with BET values ranging from 689 to 1224 m2 g(-1) for NaOH activation and from 853 to 1686 m2 g(-1) for KOH activation.
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Affiliation(s)
- A Ros
- Laboratori d'Enginyeria Química i Ambiental, Departament d'Enginyeria Química, Agrària i Tecnología Agroalimentaria, Facultat de Ciències, Universitat de Girona, E-17071 Girona, Spain
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27
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Tamargo-Martínez K, Villar-Rodil S, Paredes JI, Martínez-Alonso A, Tascón JMD, Montes-Morán MA. Surface Characterization of PBO Fibers. Macromolecules 2003. [DOI: 10.1021/ma034522l] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - Juan I. Paredes
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain
| | | | - Juan M. D. Tascón
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain
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28
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Montes-Morán MA, Paredes JI, Martínez-Alonso A, Tascón JMD. Surface Characterization of PPTA Fibers Using Inverse Gas Chromatography. Macromolecules 2002. [DOI: 10.1021/ma020069m] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Juan I. Paredes
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain
| | | | - Juan M. D. Tascón
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain
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29
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Montes-Morán MA, Paredes JI, Martínez-Alonso A, Tascón JMD. Adsorption of n-Alkanes on Plasma-Oxidized High-Strength Carbon Fibers. J Colloid Interface Sci 2002; 247:290-302. [PMID: 16290468 DOI: 10.1006/jcis.2001.8134] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2001] [Accepted: 11/24/2001] [Indexed: 11/22/2022]
Abstract
The objective of this work was to characterize the degree of heterogeneity brought about by oxygen plasma treatment of carbon fibers by studying its effects on the adsorption of n-alkanes. Untreated and unsized high-strength carbon fibers were subjected to oxygen plasma treatments with different degrees of severity. A sample of the same material oxidized following a standard industrial method was also studied for comparison. Adsorption of C5-C10n-alkanes at 303-353 K was measured by inverse gas chromatography (IGC). Elution peaks were symmetrical for the fresh and industrially oxidized samples; however, a large extent of asymmetry was observed for the plasma-treated fibers. Differences in surface heterogeneity were quantified in terms of several adsorption thermodynamic magnitudes. Differential heats of adsorption exhibited values similar to those corresponding to the probe-basal plane interaction. The dispersive component of the surface tension of the solids increased clearly upon plasma oxidation, the increase being systematic according to the severity of plasma treatment. It can be concluded that plasma oxidation generates high-surface-energy sites responsible for trapping of n-alkane molecules, this effect being more marked as the chain length increases. The possibility of this effect being associated to creation of micropores was ruled out on the basis of volumetric CO2 adsorption experiments and IGC measurements at finite dilution. Scanning tunneling microscopy observations allowed us to establish a possible connection between fiber surface nanostructure and IGC results. The sites accessible to n-alkane molecules in the industrially oxidized sample seem to be highly disordered, thus leading to a weaker interaction with the adsorbate.
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Suárez D, Menéndez JA, Fuente E, Montes-Morán MA. Pyrone-Like Structures as Novel Oxygen-Based Organic Superbases The authors thank CSIC for computer time at the CESGA and the CIEMAT. Angew Chem Int Ed Engl 2000; 39:1320-1323. [PMID: 10767045 DOI: 10.1002/(sici)1521-3773(20000403)39:7<1320::aid-anie1320>3.0.co;2-e] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- D Suárez
- Department of Chemistry Eberly College of Sciences, The Pennsylvania State University 152 Davey Laboratory, University Park, PA 16802-6300 (USA)
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Montes-Morán MA, Menéndez JA, Fuente E, Suárez D. Contribution of the Basal Planes to Carbon Basicity: An Ab Initio Study of the H3O+−π Interaction in Cluster Models. J Phys Chem B 1998. [DOI: 10.1021/jp972656t] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miguel A. Montes-Morán
- Instituto Nacional del Carbón (INCAR), CSIC, Apartado 73, 33080 Oviedo, Spain, and Departamento de Química Física y Analítica, Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo, Spain
| | - J. Angel Menéndez
- Instituto Nacional del Carbón (INCAR), CSIC, Apartado 73, 33080 Oviedo, Spain, and Departamento de Química Física y Analítica, Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo, Spain
| | - Enrique Fuente
- Instituto Nacional del Carbón (INCAR), CSIC, Apartado 73, 33080 Oviedo, Spain, and Departamento de Química Física y Analítica, Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo, Spain
| | - Dimas Suárez
- Instituto Nacional del Carbón (INCAR), CSIC, Apartado 73, 33080 Oviedo, Spain, and Departamento de Química Física y Analítica, Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo, Spain
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Martínez-Alonso A, Jamond M, Montes-Morán MA, Tascón JM. Microporous texture of activated carbon fibers prepared from aramid fiber pulp. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0927-6513(97)00050-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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