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David Torres; Luís Ayala; Ricardo I. Jeldres; Eduardo Cerecedo-Sáenz; Eleazar Salinas-Rodríguez; Pedro Robles; Norman Toro. Correction: Torres et al. Leaching Chalcopyrite with High MnO2 and Chloride Concentrations. Metals 2020, 10, 107. Metals 2021, 11, 1312 .
AMA StyleDavid Torres, Luís Ayala, Ricardo I. Jeldres, Eduardo Cerecedo-Sáenz, Eleazar Salinas-Rodríguez, Pedro Robles, Norman Toro. Correction: Torres et al. Leaching Chalcopyrite with High MnO2 and Chloride Concentrations. Metals 2020, 10, 107. Metals. 2021; 11 (8):1312.
Chicago/Turabian StyleDavid Torres; Luís Ayala; Ricardo I. Jeldres; Eduardo Cerecedo-Sáenz; Eleazar Salinas-Rodríguez; Pedro Robles; Norman Toro. 2021. "Correction: Torres et al. Leaching Chalcopyrite with High MnO2 and Chloride Concentrations. Metals 2020, 10, 107." Metals 11, no. 8: 1312.
The low grade of copper deposits and the use of the froth flotation process have caused excessive tailing production. In recent years, experts have looked for new alternative methods to improve this situation. Black copper minerals are abundant resources not exploited by large-scale copper mining and possess high Mn concentrations. On the other hand, manganese nodules are submarine resources and show high concentrations of Cu, Ni, Fe, and, mainly, Mn. However, both mineral resources are refractory to conventional leaching processes, and so a reducing agent is necessary for their treatment. We studied the use of tailings obtained from the flotation of foundry slags with a high content of Fe3O4 as reducing agents at different MnO2/tailings ratios and H2SO4 concentrations. Mn dissolution was compared in marine nodule and black copper minerals samples. It was found that higher Mn dissolutions are obtained from marine nodules, likely due to the acid consumption created by Cu dissolution from black copper minerals. The remnant elements in manganese nodules were leached under an oxidant condition.
Carlos Moraga; Eduardo Cerecedo-Saenz; Javier González; Pedro Robles; Francisco Carrillo-Pedroza; Norman Toro. Comparative Study of MnO2 Dissolution from Black Copper Minerals and Manganese Nodules in an Acid Medium. Metals 2021, 11, 817 .
AMA StyleCarlos Moraga, Eduardo Cerecedo-Saenz, Javier González, Pedro Robles, Francisco Carrillo-Pedroza, Norman Toro. Comparative Study of MnO2 Dissolution from Black Copper Minerals and Manganese Nodules in an Acid Medium. Metals. 2021; 11 (5):817.
Chicago/Turabian StyleCarlos Moraga; Eduardo Cerecedo-Saenz; Javier González; Pedro Robles; Francisco Carrillo-Pedroza; Norman Toro. 2021. "Comparative Study of MnO2 Dissolution from Black Copper Minerals and Manganese Nodules in an Acid Medium." Metals 11, no. 5: 817.
Structural and morphological properties of hydronium-potassium jarosite microstructures were investigated in this work, and their electrical properties were evaluated. All the microstructures were synthesized at a very low temperature of 70 °C with a reduced reaction time of 3 h. An increase in the pH from 0.8 to 2.1 decreased the particle sizes from 3 µm to 200 nm and an increase in the aging time from zero, three, and seven days resulted in semispherical, spherical, and euhedral jarosite structures, respectively. The Rietveld analysis also confirmed that the amount of hydronium substitution by potassium in the cationic site increased with an increase in pH. The percentages of hydronium jarosite (JH)/potassium jarosite (JK) for pH values of 0.8, 1.1, and 2.1 were 77.72/22.29%, 82.44/17.56%, and 89.98/10.02%, respectively. Microstructures obtained in this work were tested as alternative anode materials and the voltage measured using these electrodes made with hydronium-potassium jarosite microstructures and graphite ranged from 0.89 to 1.36 V. The results obtained in this work show that with reduced particle size and euhedral morphology obtained, modified jarosite microstructures can be used as anode materials for improving the lifetime of lithium-ion batteries.
Elías Hernández-Lazcano; E. Cerecedo-Sáenz; J. Hernández-Ávila; Norman Toro; T. V. K. Karthik; D. Mendoza-Anaya; M. E. Fernández-García; V. Rodríguez-Lugo; E. Salinas-Rodríguez. Synthesis of Hydronium-Potassium Jarosites: The Effect of pH and Aging Time on Their Structural, Morphological, and Electrical Properties. Minerals 2021, 11, 80 .
AMA StyleElías Hernández-Lazcano, E. Cerecedo-Sáenz, J. Hernández-Ávila, Norman Toro, T. V. K. Karthik, D. Mendoza-Anaya, M. E. Fernández-García, V. Rodríguez-Lugo, E. Salinas-Rodríguez. Synthesis of Hydronium-Potassium Jarosites: The Effect of pH and Aging Time on Their Structural, Morphological, and Electrical Properties. Minerals. 2021; 11 (1):80.
Chicago/Turabian StyleElías Hernández-Lazcano; E. Cerecedo-Sáenz; J. Hernández-Ávila; Norman Toro; T. V. K. Karthik; D. Mendoza-Anaya; M. E. Fernández-García; V. Rodríguez-Lugo; E. Salinas-Rodríguez. 2021. "Synthesis of Hydronium-Potassium Jarosites: The Effect of pH and Aging Time on Their Structural, Morphological, and Electrical Properties." Minerals 11, no. 1: 80.
Structural and morphological properties of the hydronium-potassium jarosite microstructures were investigated in this work, and their electrical properties were evaluated. All microstructures were synthesized at a reasonable temperature of 343 K with a reduced reaction time of 3 hours. Increase in the pH from 0.8 to 2.1 decreased the particle sized from 3 µm to 200 nm and increasing the aging time from 0, 3 to 7 days resulted in semispherical, spherical and euhedreal jarosite structures, respectively. A Rietveld analysis also was done, finding that increasing pH, the amount of hydronium substitution by potassium in the cationic site also increases, having a 77.72 % of hydronium jarosite (JH) plus 22.29 % potassium jarosite (JK) at pH 0.8; 82.44 % (JH) and 17.56 % (JK) at pH 1.1, and 89.98 % (JH) plus 10.02 % (JK) at pH 2.1. The results obtained in this work show that the obtained hydronium potassium jarosite microstructures with reduced particle size and euhedreal morphology can be used as anode materials for improving the life time of lithium ion batteries, due that during the analysis of the voltage obtained using electrodes made with this particles and graphite, this ranged from 0.89 to 1.36 V.
Elías Hernández-Lazcano; E. Cerecedo-Sáenz; J. Hernández-Ávila; Norman Toro; T.V.K. Karthik; D. Mendoza-Anaya; M. E. Fernández-García; V. Rodríguez-Lugo; E. Salinas-Rodríguez. Synthesis of Hydronium-Potassium Jarosite; Effect of pH and Aging Time on their Structural, Morphological and Electrical Properties. 2020, 1 .
AMA StyleElías Hernández-Lazcano, E. Cerecedo-Sáenz, J. Hernández-Ávila, Norman Toro, T.V.K. Karthik, D. Mendoza-Anaya, M. E. Fernández-García, V. Rodríguez-Lugo, E. Salinas-Rodríguez. Synthesis of Hydronium-Potassium Jarosite; Effect of pH and Aging Time on their Structural, Morphological and Electrical Properties. . 2020; ():1.
Chicago/Turabian StyleElías Hernández-Lazcano; E. Cerecedo-Sáenz; J. Hernández-Ávila; Norman Toro; T.V.K. Karthik; D. Mendoza-Anaya; M. E. Fernández-García; V. Rodríguez-Lugo; E. Salinas-Rodríguez. 2020. "Synthesis of Hydronium-Potassium Jarosite; Effect of pH and Aging Time on their Structural, Morphological and Electrical Properties." , no. : 1.
En el presente estudio se llevo a cabo la cinética de molienda tamaño por tamaño y especie por especie de las escombreras de Dos Carlos de la ciudad de Pachuca, Hidalgo, México; presentando una composición química promedio en % de 70.43 de SiO2, 7.032 de Al2O3, 2.69 de Fe2O3, 0.70 de Mn, 3.98 de K2O, 3.34 de CaO, 2.50 de Na2O, 1.01 de MgO, 0.26 de TiO2, 0.04 de Zn, 0.026 de Pb, 56 g/ton de Ag y 0.6 g/ton de Au; apreciándose como fases mineralógicas mayoritarias: cuarzo, albita, argentita, berlinita, ortoclasa, jarosita de potasio argentífera, jarosita de sodio argentífera, feldespato, Anortoclasa, Calcita. Los resultados experimentales muestran que a medida que el tiempo de molienda se incrementa hasta valores comprendidos entre 32 y 46 minutos, la distribución de los contenidos metálicos es muy similar y se encuentran dados por el rango de 200 a 400 mallas, la máxima velocidad especifica de molienda global (tamaño por tamaño) y por especie correspondiente a la malla 200, para tamaños menores a la malla 200 se genera una disminución en la velocidad especifica por especie (plata), determinandose que el tiempo óptimo de molienda encontrado bajo estas condiciones estudiadas fue de 8 minutos.
Juan Hernández-Ávila; Eduardo Cerecedo-Saenz; Norman Toro; Alberto Arenas-Flores; Ventura Rodríguez-Lugo; Eleazar Salinas-Rodríguez. Cinética de Molienda de las Escombreras del Distrito Pachuca-Real del Monte, Estado de Hidalgo, México. Pädi Boletín Científico de Ciencias Básicas e Ingenierías del ICBI 2020, 8, 74 -79.
AMA StyleJuan Hernández-Ávila, Eduardo Cerecedo-Saenz, Norman Toro, Alberto Arenas-Flores, Ventura Rodríguez-Lugo, Eleazar Salinas-Rodríguez. Cinética de Molienda de las Escombreras del Distrito Pachuca-Real del Monte, Estado de Hidalgo, México. Pädi Boletín Científico de Ciencias Básicas e Ingenierías del ICBI. 2020; 8 (Especial):74-79.
Chicago/Turabian StyleJuan Hernández-Ávila; Eduardo Cerecedo-Saenz; Norman Toro; Alberto Arenas-Flores; Ventura Rodríguez-Lugo; Eleazar Salinas-Rodríguez. 2020. "Cinética de Molienda de las Escombreras del Distrito Pachuca-Real del Monte, Estado de Hidalgo, México." Pädi Boletín Científico de Ciencias Básicas e Ingenierías del ICBI 8, no. Especial: 74-79.
Some sedimentary minerals have attractive contents of gold and silver, like a sedimentary exhalative ore available in the eastern of Hidalgo in Mexico. The gold and silver contained represent an interesting opportunity for processing by non-toxic and aggressive leaching reagents like thiosulfate. The preliminary kinetic study indicated that the leaching process was poorly affected by temperature and thiosulfate concentration. The reaction order was −0.61 for Ag, considering a thiosulfate concentration between 200–500 mol·m−3, while, for Au, it was −0.09 for a concentration range between 32–320 mol·m–3. By varying the pH 7–10, it was found that the reaction order was n = 5.03 for Ag, while, for Au, the value was n = 0.94, considering pH 9.5–11. The activation energy obtained during the silver leaching process was 3.15 kJ·mol−1 (298–328 K), which was indicative of a diffusive control of the process. On the other hand, during gold leaching, the activation energy obtained was of 36.44 kJ·mol−1, which was indicative that this process was mixed controlled process, first at low temperatures by diffusive control (298–313 K) and then by chemical control (318–323 K).
Edmundo Roldán-Contreras; Eleazar Salinas-Rodríguez; Juan Hernández-Ávila; Eduardo Cerecedo-Sáenz; Ventura Rodríguez-Lugo; Ricardo I. Jeldres; Norman Toro; Salinas- Rodríguez. Leaching of Silver and Gold Contained in a Sedimentary Ore, Using Sodium Thiosulfate; A Preliminary Kinetic Study. Metals 2020, 10, 159 .
AMA StyleEdmundo Roldán-Contreras, Eleazar Salinas-Rodríguez, Juan Hernández-Ávila, Eduardo Cerecedo-Sáenz, Ventura Rodríguez-Lugo, Ricardo I. Jeldres, Norman Toro, Salinas- Rodríguez. Leaching of Silver and Gold Contained in a Sedimentary Ore, Using Sodium Thiosulfate; A Preliminary Kinetic Study. Metals. 2020; 10 (2):159.
Chicago/Turabian StyleEdmundo Roldán-Contreras; Eleazar Salinas-Rodríguez; Juan Hernández-Ávila; Eduardo Cerecedo-Sáenz; Ventura Rodríguez-Lugo; Ricardo I. Jeldres; Norman Toro; Salinas- Rodríguez. 2020. "Leaching of Silver and Gold Contained in a Sedimentary Ore, Using Sodium Thiosulfate; A Preliminary Kinetic Study." Metals 10, no. 2: 159.
Most copper minerals are found as sulfides, with chalcopyrite being the most abundant. However; this ore is refractory to conventional hydrometallurgical methods, so it has been historically exploited through froth flotation, followed by smelting operations. This implies that the processing involves polluting activities, either by the formation of tailings dams and the emission of large amounts of SO2 into the atmosphere. Given the increasing environmental restrictions, it is necessary to consider new processing strategies, which are compatible with the environment, and, if feasible, combine the reuse of industrial waste. In the present research, the dissolution of pure chalcopyrite was studied considering the use of MnO2 and wastewater with a high chloride content. Fine particles (−20 µm) generated an increase in extraction of copper from the mineral. Besides, it was discovered that working at high temperatures (80 °C); the large concentrations of MnO2 become irrelevant. The biggest copper extractions of this work (71%) were achieved when operating at 80 °C; particle size of −47 + 38 µm, MnO2/CuFeS2 ratio of 5/1, and 1 mol/L of H2SO4.
David Torres; Luís Ayala; Ricardo I. Jeldres; Eduardo Cerecedo-Sáenz; Eleazar Salinas-Rodríguez; Pedro Robles; Norman Toro. Leaching Chalcopyrite with High MnO2 and Chloride Concentrations. Metals 2020, 10, 107 .
AMA StyleDavid Torres, Luís Ayala, Ricardo I. Jeldres, Eduardo Cerecedo-Sáenz, Eleazar Salinas-Rodríguez, Pedro Robles, Norman Toro. Leaching Chalcopyrite with High MnO2 and Chloride Concentrations. Metals. 2020; 10 (1):107.
Chicago/Turabian StyleDavid Torres; Luís Ayala; Ricardo I. Jeldres; Eduardo Cerecedo-Sáenz; Eleazar Salinas-Rodríguez; Pedro Robles; Norman Toro. 2020. "Leaching Chalcopyrite with High MnO2 and Chloride Concentrations." Metals 10, no. 1: 107.
The generation of mining waste commonly led to the use of spaces for its disposal. Challenges like mitigating the damage to surrounding communities have promoted the need to reuse, recycle and/or reduce their generation. Besides, these residues may become a source of materials, which are capable of being recovered and reused in several industries, minimizing the environmental impact. In the mining region of Pachuca, Mexico, waste from the mining industry have been generated for more than 100 years, which have a high SiO2 content that can be recovered for various industrial applications. This work aims to recover silica from a material of the Dos Carlos dam. A columnar system composed of two-stage of cleaning was used, considering a JLT (surface liquid rate) value of 0.45 and 0.68 cm/s, respectively; while the Jg (surface gas rate) value was 0.30 cm/s for both stages. Similar bubble sizes in the range of Jg 0.10 to 0.30 cm/s, with values between 0.14 and 0.16 cm in the first stage, and 0.05 to 0.06 cm in the second one. This provided a recovery of 75.10% for all the allotropic phases of silica (quartz, trydimite, and cristobalite) leaving a concentration of 24.90% of a feldspathic phase (orthoclase), as flotation tails.
Eleazar Salinas-Rodriguez; Javier Flores-Badillo; Juan Hernandez-Avila; Eduardo Cerecedo-Saenz; Ma. Del Pilar Gutierrez-Amador; Ricardo I. Jeldres; Normam Toro. Assessment of Silica Recovery from Metallurgical Mining Waste, by Means of Column Flotation. Metals 2020, 10, 72 .
AMA StyleEleazar Salinas-Rodriguez, Javier Flores-Badillo, Juan Hernandez-Avila, Eduardo Cerecedo-Saenz, Ma. Del Pilar Gutierrez-Amador, Ricardo I. Jeldres, Normam Toro. Assessment of Silica Recovery from Metallurgical Mining Waste, by Means of Column Flotation. Metals. 2020; 10 (1):72.
Chicago/Turabian StyleEleazar Salinas-Rodriguez; Javier Flores-Badillo; Juan Hernandez-Avila; Eduardo Cerecedo-Saenz; Ma. Del Pilar Gutierrez-Amador; Ricardo I. Jeldres; Normam Toro. 2020. "Assessment of Silica Recovery from Metallurgical Mining Waste, by Means of Column Flotation." Metals 10, no. 1: 72.
This paper describe the influence of the Rift Molango during the mineralization of elements of the platinum group and some light rare earths elements in a sedimentary exhalative ore deposit.
Edgar A. Cardenas-Reyes; Eleazar Salinas-Rodríguez; Juan Hernández-Ávila; Ventura Rodríguez-Lugo; Ma. Pilar Gutierrez-Amador; Edmundo Roldan-Contreras; Eduardo Cerecedo-Sáenz. Influence of the Rift Molango over the mineralization of platinum group elements and light rare earths into a sedimentary exhalative ore deposit. 2019, 1 .
AMA StyleEdgar A. Cardenas-Reyes, Eleazar Salinas-Rodríguez, Juan Hernández-Ávila, Ventura Rodríguez-Lugo, Ma. Pilar Gutierrez-Amador, Edmundo Roldan-Contreras, Eduardo Cerecedo-Sáenz. Influence of the Rift Molango over the mineralization of platinum group elements and light rare earths into a sedimentary exhalative ore deposit. . 2019; ():1.
Chicago/Turabian StyleEdgar A. Cardenas-Reyes; Eleazar Salinas-Rodríguez; Juan Hernández-Ávila; Ventura Rodríguez-Lugo; Ma. Pilar Gutierrez-Amador; Edmundo Roldan-Contreras; Eduardo Cerecedo-Sáenz. 2019. "Influence of the Rift Molango over the mineralization of platinum group elements and light rare earths into a sedimentary exhalative ore deposit." , no. : 1.
ZnO microstructures were synthesized by conventional and homogenous precipitation methods utilizing ammonium hydroxide and urea as precipitation agents, respectively. Maximum synthesis temperature was around 90 °C for 10 and 13 h. XRD indicates the presence of ZnO wurtzite hexagonal structure and FTIR results suggests that all samples possess similar functional groups whereas an increment in the calcination time increases the Zn-O band intensity at ∼ 550 cm-1 confirming the formation of ZnO. Morphological analysis evidences ZnO nuts and needle like morphologies for samples calcined at 13 h with urea and ammonia as precipitation agents, correspondingly. Growth mechanism of ZnO porous structures at different calcination temperatures and precipitation agents are reported in this work.
T.V.K. Karthik; Ventura Rodriguez Lugo; A.G. Hernandez; J.L. Navarro Jiménez; D. Sanchez-Campos; Heberto Gómez Pozos; D. Mendoza Anaya; Eduardo Cerecedo. Low temperature facile synthesis of ZnO nuts and needle like microstructures. Materials Letters 2019, 246, 56 -59.
AMA StyleT.V.K. Karthik, Ventura Rodriguez Lugo, A.G. Hernandez, J.L. Navarro Jiménez, D. Sanchez-Campos, Heberto Gómez Pozos, D. Mendoza Anaya, Eduardo Cerecedo. Low temperature facile synthesis of ZnO nuts and needle like microstructures. Materials Letters. 2019; 246 ():56-59.
Chicago/Turabian StyleT.V.K. Karthik; Ventura Rodriguez Lugo; A.G. Hernandez; J.L. Navarro Jiménez; D. Sanchez-Campos; Heberto Gómez Pozos; D. Mendoza Anaya; Eduardo Cerecedo. 2019. "Low temperature facile synthesis of ZnO nuts and needle like microstructures." Materials Letters 246, no. : 56-59.
El enorme auge en la producción y consumo de aparatos eléctricos y electrónicos debidos a nuevas y mejores tecnologías, genera equipos con una menor vida útil consolidándolo como el flujo de residuos de mayor crecimiento a nivel mundial lo cual tiene como consecuencias problemáticas de carácter ambiental y de salud humana. Sin embargo, estos desechos contienen una gran cantidad de metales nobles, fundamentado en que cada placa de circuito impreso (presenta de 0.1 a 0.5 gramos de oro, frente a una extracción de 1 a 5 gramos de oro por tonelada de mineral. Teniendo en cuenta estos datos, la recuperación metálica de la chatarra electrónica por diversos procesos ha sido considerada como una fuente secundaria comercialmente viable de extracción de metales. Previamente a una recuperación de metales, es importante conocer las cantidades representativas de metales específicos contenidos en los desechos electrónicos. Es por ello que en este trabajo de investigación se llevó a cabo una amplia caracterización cualitativa, cuantitativa y semicuantitativa de materiales de desechos de equipos de cómputo de diferentes épocas, identificando componentes ricos en oro; utilizando técnicas como Difracción de Rayos X, Microscopia Electrónica de Barrido en conjunto con Microanálisis por Dispersión de Energías y Espectroscopía de Plasma de Acoplamiento Inducido. Como resultado se obtuvieron concentraciones máximas de oro del 99.4 % en peso en pines soportados en el procesador.
Abner Hesli Rojas Calva; María Isabel Reyes Valderrama; Ventura Rodriguez Lugo; Eleazar Salinas Rodriguez; Juan Hernandez Ávila; Eduardo Cerecedo Sáenz. Caracterización y estudio de la composición de oro presente en la chatarra electrónica. Pädi Boletín Científico de Ciencias Básicas e Ingenierías del ICBI 2018, 6, 1 .
AMA StyleAbner Hesli Rojas Calva, María Isabel Reyes Valderrama, Ventura Rodriguez Lugo, Eleazar Salinas Rodriguez, Juan Hernandez Ávila, Eduardo Cerecedo Sáenz. Caracterización y estudio de la composición de oro presente en la chatarra electrónica. Pädi Boletín Científico de Ciencias Básicas e Ingenierías del ICBI. 2018; 6 (11):1.
Chicago/Turabian StyleAbner Hesli Rojas Calva; María Isabel Reyes Valderrama; Ventura Rodriguez Lugo; Eleazar Salinas Rodriguez; Juan Hernandez Ávila; Eduardo Cerecedo Sáenz. 2018. "Caracterización y estudio de la composición de oro presente en la chatarra electrónica." Pädi Boletín Científico de Ciencias Básicas e Ingenierías del ICBI 6, no. 11: 1.
In this study, four samples of recycled aggregates from the construction and demolition waste of Mexico City were characterized in order to find innovative uses for these types of materials. Gravel and sand from a recycling plant were analyzed, as well as aggregates produced in the laboratory from demolished concrete collected from landfills. The characterization was carried out by means of XRD (X-ray Diffraction), chemical microanalysis (EDS), X-ray fluorescence (XRF), pH measurement, and sieve analysis. The minerals present in the analyzed materials were feldspars, cristobalite and pyroxene, which corresponded to the natural aggregates, as well as variable amounts of calcite, a product of the carbonation of the cement paste adhered to these aggregates, and in a smaller proportion, calcium hemicarboaluminate, rosenhanite, and tobermorite. The quality (amount of cement) of the original concrete has a great influence on the granulometry and the chemical–mineralogical composition of the aggregates, since there will be different quantities and qualities of the cement paste adhered to the aggregates depending on their size. Finally, the pH values measured in all samples fluctuated between 10.15 and 12.08, suggesting that these materials can be used in soil stabilization or in agricultural applications.
Emiliano Moreno-Pérez; Juan Hernández-Ávila; Yamile Rangel-Martínez; Eduardo Cerecedo-Sáenz; Alberto Arenas-Flores; Ma. Isabel Reyes-Valderrama; Eleazar Salinas-Rodriguez. Chemical and Mineralogical Characterization of Recycled Aggregates from Construction and Demolition Waste from Mexico City. Minerals 2018, 8, 237 .
AMA StyleEmiliano Moreno-Pérez, Juan Hernández-Ávila, Yamile Rangel-Martínez, Eduardo Cerecedo-Sáenz, Alberto Arenas-Flores, Ma. Isabel Reyes-Valderrama, Eleazar Salinas-Rodriguez. Chemical and Mineralogical Characterization of Recycled Aggregates from Construction and Demolition Waste from Mexico City. Minerals. 2018; 8 (6):237.
Chicago/Turabian StyleEmiliano Moreno-Pérez; Juan Hernández-Ávila; Yamile Rangel-Martínez; Eduardo Cerecedo-Sáenz; Alberto Arenas-Flores; Ma. Isabel Reyes-Valderrama; Eleazar Salinas-Rodriguez. 2018. "Chemical and Mineralogical Characterization of Recycled Aggregates from Construction and Demolition Waste from Mexico City." Minerals 8, no. 6: 237.
The following sections are included:
Eleazar Salinas-Rodríguez; Juan Hernández-Ávila; Eduardo Cerecedo-Sáenz; Alberto Arenas-Flores; Ma. Isabel Reyes-Valderrama; Edmundo Roldán-Contreras; Ventura Rodriguez Lugo. Leaching of Silver Contained in Mining Tailings: A Comparative Study of Several Leaching Reagents. Silver Recovery from Assorted Spent Sources 2018, 11 -53.
AMA StyleEleazar Salinas-Rodríguez, Juan Hernández-Ávila, Eduardo Cerecedo-Sáenz, Alberto Arenas-Flores, Ma. Isabel Reyes-Valderrama, Edmundo Roldán-Contreras, Ventura Rodriguez Lugo. Leaching of Silver Contained in Mining Tailings: A Comparative Study of Several Leaching Reagents. Silver Recovery from Assorted Spent Sources. 2018; ():11-53.
Chicago/Turabian StyleEleazar Salinas-Rodríguez; Juan Hernández-Ávila; Eduardo Cerecedo-Sáenz; Alberto Arenas-Flores; Ma. Isabel Reyes-Valderrama; Edmundo Roldán-Contreras; Ventura Rodriguez Lugo. 2018. "Leaching of Silver Contained in Mining Tailings: A Comparative Study of Several Leaching Reagents." Silver Recovery from Assorted Spent Sources , no. : 11-53.
The newer tendencies of research, related with the leaching of precious metals, involves the use of non toxic reagents that allows the leaching of a mineral of sedimentary origin using the system S2 - O3 2- - O2. Prior to thisprocess, the mineral was characterized by Scanning Electron Microscopy (SEM) in conjunction with Energy Dispersive Spectrometry of X – rays (EDS), X- ray mapping. Finally, the chemical composition was executed by Inductively Coupled Plasma Spectrometry (ICP). According to the results obtained, it was possible to determine that the mineral studied has adequate contents of gold, palladium, silver, and platinum. And after the leaching process, it could be possible to leach the gold and palladium that it contains, getting recoveries of 90% and 85 %, respectively. In the case of silver, a redissolution or precipitation could occur during the first minutes of reaction.
Edmundo Roldán-Contreras; Juan Hernández-Ávila; Eduardo Cerecedo-Sáenz; Ma. Isabel Reyes-Valderrama; Eleazar Salinas-Rodríguez. Use of the System S2o3 (2-) -O2 for the Leaching of Precious Metals Contained in a Mineral From Molango in the State of Hidalgo, Mexico. European Scientific Journal, ESJ 2018, 14, 1 .
AMA StyleEdmundo Roldán-Contreras, Juan Hernández-Ávila, Eduardo Cerecedo-Sáenz, Ma. Isabel Reyes-Valderrama, Eleazar Salinas-Rodríguez. Use of the System S2o3 (2-) -O2 for the Leaching of Precious Metals Contained in a Mineral From Molango in the State of Hidalgo, Mexico. European Scientific Journal, ESJ. 2018; 14 (3):1.
Chicago/Turabian StyleEdmundo Roldán-Contreras; Juan Hernández-Ávila; Eduardo Cerecedo-Sáenz; Ma. Isabel Reyes-Valderrama; Eleazar Salinas-Rodríguez. 2018. "Use of the System S2o3 (2-) -O2 for the Leaching of Precious Metals Contained in a Mineral From Molango in the State of Hidalgo, Mexico." European Scientific Journal, ESJ 14, no. 3: 1.
This work shows the physicochemical behavior of two different diatoms from the country of Mexico (State of Jalisco and Hidalgo) with similar compositions. These were used to eliminate toxic cations from a synthetic solution containing 5.270 mg As3+/L; 4.280 mg Ag+/L; 3.950 mgNi2+/L; 4.090 mg Cr6+/L; and 4.081 mg Pb2+/L. These diatoms were used as filters, and the quantity of cations remaining in the solution after filtering was measured. According to the most important results found, for the recovery of metals, both minerals achieved arsenic, silver, lead, and nickel recoveries up to 95%, and lower than 10% for chromium. This could be due to the absence of an environment to reduce Cr6+ to Cr3+. On the other hand, it was observed that there was no selectivity during the recovery of the other cations present in the solution. According to efficiency of interchange, the mineral from Hidalgo is slightly better than the mineral from Jalisco for the removal of arsenic, lead, and silver. For nickel, and particularly Cr6+, the efficiency is higher for the sample from Jalisco.
Juan Hernández-Ávila; Eleazar Salinas-Rodríguez; Eduardo Cerecedo-Sáenz; Ma. Isabel Reyes-Valderrama; Alberto Arenas-Flores; Alma Delia Román-Gutiérrez; Ventura Rodríguez-Lugo. Diatoms and Their Capability for Heavy Metal Removal by Cationic Exchange. Metals 2017, 7, 169 .
AMA StyleJuan Hernández-Ávila, Eleazar Salinas-Rodríguez, Eduardo Cerecedo-Sáenz, Ma. Isabel Reyes-Valderrama, Alberto Arenas-Flores, Alma Delia Román-Gutiérrez, Ventura Rodríguez-Lugo. Diatoms and Their Capability for Heavy Metal Removal by Cationic Exchange. Metals. 2017; 7 (5):169.
Chicago/Turabian StyleJuan Hernández-Ávila; Eleazar Salinas-Rodríguez; Eduardo Cerecedo-Sáenz; Ma. Isabel Reyes-Valderrama; Alberto Arenas-Flores; Alma Delia Román-Gutiérrez; Ventura Rodríguez-Lugo. 2017. "Diatoms and Their Capability for Heavy Metal Removal by Cationic Exchange." Metals 7, no. 5: 169.
We report potentiodynamic studies to characterize copper, nickel and zinc leaching solutions from electronic waste. The metals were leached using oxygen and sulfuric acid (pH = 1.5). As is known, reduction potentials are determined using thermodynamics laws, and metal recovery strategies from electronic waste are usually considered according these thermodynamic values. Pourbaix‐type diagrams are not appropriate to plan strategies in electrochemical processing. Therefore, knowledge of electrode potentials for the metal deposit/dissolution process is the basis for the selective recovery planning. For this reason, potentiodynamic studies, specifically cyclic voltammetry, are revealed as a good way to decide the best conditions for the process of electrochemical recovery of metals from electronic waste, which is also cost‐efficient and has no interference from strange ions, such as lead, in this case.
Ma. Isabel Reyes‐Valderrama; Eleazar Salinas‐Rodríguez; J. Fabian Montiel‐Hernández; Isauro Rivera‐Landero; Eduardo Cerecedo‐Sáenz; Juan Hernándezvila; Alberto Arenas‐Flores; Juan Hernández-Ávila. Urban Mining and Electrochemistry: Cyclic Voltammetry Study of Acidic Solutions from Electronic Wastes (Printed Circuit Boards) for Recovery of Cu, Zn, and Ni. Metals 2017, 7, 55 .
AMA StyleMa. Isabel Reyes‐Valderrama, Eleazar Salinas‐Rodríguez, J. Fabian Montiel‐Hernández, Isauro Rivera‐Landero, Eduardo Cerecedo‐Sáenz, Juan Hernándezvila, Alberto Arenas‐Flores, Juan Hernández-Ávila. Urban Mining and Electrochemistry: Cyclic Voltammetry Study of Acidic Solutions from Electronic Wastes (Printed Circuit Boards) for Recovery of Cu, Zn, and Ni. Metals. 2017; 7 (2):55.
Chicago/Turabian StyleMa. Isabel Reyes‐Valderrama; Eleazar Salinas‐Rodríguez; J. Fabian Montiel‐Hernández; Isauro Rivera‐Landero; Eduardo Cerecedo‐Sáenz; Juan Hernándezvila; Alberto Arenas‐Flores; Juan Hernández-Ávila. 2017. "Urban Mining and Electrochemistry: Cyclic Voltammetry Study of Acidic Solutions from Electronic Wastes (Printed Circuit Boards) for Recovery of Cu, Zn, and Ni." Metals 7, no. 2: 55.
Eleazar Salinas-Rodríguez; Juan Hernández-Ávila; Isauro Rivera-Landero; Eduardo Cerecedo-Sáenz; Ma. Isabel Reyes-Valderrama; Manuel Correa-Cruz; Daniel Rubio-Mihi. Leaching of silver contained in mining tailings, using sodium thiosulfate: A kinetic study. Hydrometallurgy 2016, 160, 6 -11.
AMA StyleEleazar Salinas-Rodríguez, Juan Hernández-Ávila, Isauro Rivera-Landero, Eduardo Cerecedo-Sáenz, Ma. Isabel Reyes-Valderrama, Manuel Correa-Cruz, Daniel Rubio-Mihi. Leaching of silver contained in mining tailings, using sodium thiosulfate: A kinetic study. Hydrometallurgy. 2016; 160 ():6-11.
Chicago/Turabian StyleEleazar Salinas-Rodríguez; Juan Hernández-Ávila; Isauro Rivera-Landero; Eduardo Cerecedo-Sáenz; Ma. Isabel Reyes-Valderrama; Manuel Correa-Cruz; Daniel Rubio-Mihi. 2016. "Leaching of silver contained in mining tailings, using sodium thiosulfate: A kinetic study." Hydrometallurgy 160, no. : 6-11.
Chemical and structural characterization of four representative samples of an ore deposit located in the eastern of Hidalgo State was carried out. According with the results, it could be appreciate some areas showing silicified zones with abundant amounts of disseminated pyrites that are part of a rock unit from early Jurassic consisting in inter - bedded black shales and sandstones. Thus, the contents of base metal were greater than 30 ppm Zn and 9 ppm Cu. Chemical analysis of rock gave the following results; 82 ppm of Ba, 1.64 % Wt. Fe, 0.08 % Wt. Ti, 40.8 % Wt. Si, 20 ppm of Ce, 2.2 ppm Co, 30 ppm Cr, 2.7 ppm Cs, 0.9 ppm Er, 2.5 ppm Ga, 1.6 ppm Gd , 1.5 ppm Ge, 9 ppm La, 71 ppm Li, 104 ppm Mn, 10 ppm Nd , 17 ppm Rb, 2 ppm Se, 9 ppm Sr, 10 ppm Ta, 6 ppm Te, 28 ppm V, 9 ppm Y, and 0.7 ppm Yb, among others. Finally, the values found for precious metals, were; Au < 0.02 ppm, Pd
Eduardo Cerecedo; V. Rodríguez; P.D. Andrade; E. Salinas; J. Hernández; A. Arenas. Chemical Characterization of a Mineral Deposit of Economic Interest. MRS Proceedings 2015, 1766, 115 -122.
AMA StyleEduardo Cerecedo, V. Rodríguez, P.D. Andrade, E. Salinas, J. Hernández, A. Arenas. Chemical Characterization of a Mineral Deposit of Economic Interest. MRS Proceedings. 2015; 1766 ():115-122.
Chicago/Turabian StyleEduardo Cerecedo; V. Rodríguez; P.D. Andrade; E. Salinas; J. Hernández; A. Arenas. 2015. "Chemical Characterization of a Mineral Deposit of Economic Interest." MRS Proceedings 1766, no. : 115-122.
Scientific Open Access Monographs, Monográficos científicos en acceso abierto
Juan Hernández Ávila; Eleazar Salinas Rodríguez; Alberto Blanco Piñón; Eduardo Cerecedo Sáenz; Ventura Rodríguez Lugo. Carbonato de Calcio en México. Características geológicas, mineralógicas y aplicaciones. Carbonato de Calcio en México. Características geológicas, mineralógicas y aplicaciones 2015, 1 .
AMA StyleJuan Hernández Ávila, Eleazar Salinas Rodríguez, Alberto Blanco Piñón, Eduardo Cerecedo Sáenz, Ventura Rodríguez Lugo. Carbonato de Calcio en México. Características geológicas, mineralógicas y aplicaciones. Carbonato de Calcio en México. Características geológicas, mineralógicas y aplicaciones. 2015; ():1.
Chicago/Turabian StyleJuan Hernández Ávila; Eleazar Salinas Rodríguez; Alberto Blanco Piñón; Eduardo Cerecedo Sáenz; Ventura Rodríguez Lugo. 2015. "Carbonato de Calcio en México. Características geológicas, mineralógicas y aplicaciones." Carbonato de Calcio en México. Características geológicas, mineralógicas y aplicaciones , no. : 1.
The alkaline decomposition of Argentian rubidium jarosite in NaOH media is characterized by an induction period and a progressive conversion period in which the sulfate and rubidium ions pass to the solution, leaving an amorphous iron hydroxide residue. The process is chemically controlled and the order of reaction with respect to hydroxide concentration in the range of 1.75 and 20.4 mol OH− m−3 is 0.94, while activation energy in the range of temperatures of 298 K to 328 K (25 °C to 55 °C) is 91.3 kJ mol−1. Cyaniding of Argentian rubidium jarosite in NaOH media presents a reaction order of 0 with respect to NaCN concentration (in the range of 5 to 41 mol m−3) and an order of reaction of 0.62 with respect to hydroxide concentration, in the range of 1.1 and 30 mol [OH−] m−3. In this case, the cyaniding process can be described, as in other jarosites, as the following two-step process: (1) a step (slow) of alkaline decomposition that controls the overall process followed by (2) a fast step of silver complexation. The activation energy during cyaniding in the range of temperatures of 298 K to 333 K (25 °C to 60 °C) is 43.5 kJ mol−1, which is characteristic of a process controlled by chemical reaction. These results are quite similar to that observed for several synthetic jarosites and that precipitated in a zinc hydrometallurgical plant (Industrial Minera México, San Luis Potosi).
Eleazar Salinas Rodríguez; Eduardo Cerecedo Sáenz; Marius Ramírez; Francisco Patiño Cardona; Miguel Pérez Labra; Marius Ramirez-Cardona. Kinetics of Alkaline Decomposition and Cyaniding of Argentian Rubidium Jarosite in NaOH Medium. Metallurgical and Materials Transactions A 2012, 43, 1027 -1033.
AMA StyleEleazar Salinas Rodríguez, Eduardo Cerecedo Sáenz, Marius Ramírez, Francisco Patiño Cardona, Miguel Pérez Labra, Marius Ramirez-Cardona. Kinetics of Alkaline Decomposition and Cyaniding of Argentian Rubidium Jarosite in NaOH Medium. Metallurgical and Materials Transactions A. 2012; 43 (5):1027-1033.
Chicago/Turabian StyleEleazar Salinas Rodríguez; Eduardo Cerecedo Sáenz; Marius Ramírez; Francisco Patiño Cardona; Miguel Pérez Labra; Marius Ramirez-Cardona. 2012. "Kinetics of Alkaline Decomposition and Cyaniding of Argentian Rubidium Jarosite in NaOH Medium." Metallurgical and Materials Transactions A 43, no. 5: 1027-1033.