Pub Date : 2022-12-31DOI: 10.35429/jcpe.2022.27.9.15.27
P. Maldonado-Rivas, E. García-Ochoa, F. Corvo-Pérez, M. Chan-Bacab
Corrosion inhibitors can trigger health and/or environmental problems due to their toxicity. For this reason, it has been suggested to use plant extracts as natural corrosion inhibitors, because they represent a rich source of chemical compounds, they are non-toxic, biodegradable and abundant in nature. Sorghum halepense is a herbaceous weed, commonly known as johnson grass, belongs to the family gramíneae or poaceae, the choice of this plant is due to its zero cost and easy availability. In this systematic review, were used keywords such as Sorghum halepense johnson grass, phytochemistry, phytotherapy, phytoremediation, antidiabetic, antioxidant, cytotoxicity, antifungal, antimicrobial, anticancer, biological activity, medical activity, allelochemicals, among others. To do this, were used databases such as Scielo, Dialnet, Redalyc, Google Scholar, DOAJ, Wiley online library, BioOne, EBSCOHost, Knovel, ScienceDirect, SpringerLink y VirtualPro. Previous studies on this weed have reported its therapeutic potential against cancer, diabetes, prostatitis, hepatoprotective activity, antioxidant, antimicrobial, antifungal, as well as abortifacient and placental delivery in veterinary medicine. In view of the numerous organic molecules present in this plant, this study proposes Sorghum halepense as a potential natural corrosion inhibitor.
{"title":"Sorghum halepense (Zacate Johnson) as a potential natural corrosion inhibitor","authors":"P. Maldonado-Rivas, E. García-Ochoa, F. Corvo-Pérez, M. Chan-Bacab","doi":"10.35429/jcpe.2022.27.9.15.27","DOIUrl":"https://doi.org/10.35429/jcpe.2022.27.9.15.27","url":null,"abstract":"Corrosion inhibitors can trigger health and/or environmental problems due to their toxicity. For this reason, it has been suggested to use plant extracts as natural corrosion inhibitors, because they represent a rich source of chemical compounds, they are non-toxic, biodegradable and abundant in nature. Sorghum halepense is a herbaceous weed, commonly known as johnson grass, belongs to the family gramíneae or poaceae, the choice of this plant is due to its zero cost and easy availability.\u0000In this systematic review, were used keywords such as Sorghum halepense johnson grass, phytochemistry, phytotherapy, phytoremediation, antidiabetic, antioxidant, cytotoxicity, antifungal, antimicrobial, anticancer, biological activity, medical activity, allelochemicals, among others. To do this, were used databases such as Scielo, Dialnet, Redalyc, Google Scholar, DOAJ, Wiley online library, BioOne, EBSCOHost, Knovel, ScienceDirect, SpringerLink y VirtualPro. Previous studies on this weed have reported its therapeutic potential against cancer, diabetes, prostatitis, hepatoprotective activity, antioxidant, antimicrobial, antifungal, as well as abortifacient and placental delivery in veterinary medicine. In view of the numerous organic molecules present in this plant, this study proposes Sorghum halepense as a potential natural corrosion inhibitor.","PeriodicalId":326700,"journal":{"name":"Revista de Energía Química y Física","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134618294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Plants are capable of producing their own food through photosynthesis, an extremely complex chemical process that groups of scientists around the world are trying to replicate in their laboratories. It is what is known as "artificial photosynthesis" and, although it is still in the research phase, it will be useful to generate less polluting energy. Solar energy intervenes in photosynthesis -which the plant converts into chemical energy and, later, into nutrients-, CO2 or chlorophyll, but what interest’s scientists above all is water and the two elements that form it, hydrogen and oxygen. And it is that, one of the objectives of artificial photosynthesis is to imitate the process by which this liquid is broken down into hydrogen and oxygen molecules, as occurs in natural photosynthesis: the hydrogen formed could be used in the future as fuel in motor vehicles to replace oil.Plants carry out their photosynthesis in two stages, a so-called bright one that depends on sunlight, and another called dark, in which reactions that do not need sunlight take place.
{"title":"Generate electric current from the natural photosynthesis of a plant","authors":"Jesús Gerardo Llanillo-Navales, Esteban Gutierrez-Peña, Leticia Rendon-Sandoval","doi":"10.35429/jcpe.2022.27.9.28.34","DOIUrl":"https://doi.org/10.35429/jcpe.2022.27.9.28.34","url":null,"abstract":"Plants are capable of producing their own food through photosynthesis, an extremely complex chemical process that groups of scientists around the world are trying to replicate in their laboratories. It is what is known as \"artificial photosynthesis\" and, although it is still in the research phase, it will be useful to generate less polluting energy. Solar energy intervenes in photosynthesis -which the plant converts into chemical energy and, later, into nutrients-, CO2 or chlorophyll, but what interest’s scientists above all is water and the two elements that form it, hydrogen and oxygen. And it is that, one of the objectives of artificial photosynthesis is to imitate the process by which this liquid is broken down into hydrogen and oxygen molecules, as occurs in natural photosynthesis: the hydrogen formed could be used in the future as fuel in motor vehicles to replace oil.Plants carry out their photosynthesis in two stages, a so-called bright one that depends on sunlight, and another called dark, in which reactions that do not need sunlight take place.","PeriodicalId":326700,"journal":{"name":"Revista de Energía Química y Física","volume":"184 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114034343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.35429/jcpe.2022.27.9.1.7
Fabiola Iveth Ortega Montes, H. Rubio-Arias, M. G. Macías-López, María Elvira González-Anchondo
The objective in the investigation was to evaluate the water retention in a calcareous soil added with a Mexican natural zeolite. A natural zeolite can absorb and retain large amounts of water. Four treatments were tested; without zeolite application (T1-control), with application of 5 ton ha-1 (T2), 10 ton ha-1 (T3) and 15 ton ha-1 (T4) of zeolite. The experimental design was a complete block with four replicates. The percentage (%) of water retention in the soil was quantified on February 11, February 25, March 31 and April 12, 2021. Prior to the establishment of the experiment the soil (0-30 cm) was characterized by quantifying pH, electrical conductivity (EC), organic matter (OM), N, P, carbonates, bicarbonates and chlorides.
{"title":"Water retention and physical-chemical changes in a calcareous soil with application of a Mexican natural zeolite","authors":"Fabiola Iveth Ortega Montes, H. Rubio-Arias, M. G. Macías-López, María Elvira González-Anchondo","doi":"10.35429/jcpe.2022.27.9.1.7","DOIUrl":"https://doi.org/10.35429/jcpe.2022.27.9.1.7","url":null,"abstract":"The objective in the investigation was to evaluate the water retention in a calcareous soil added with a Mexican natural zeolite. A natural zeolite can absorb and retain large amounts of water. Four treatments were tested; without zeolite application (T1-control), with application of 5 ton ha-1 (T2), 10 ton ha-1 (T3) and 15 ton ha-1 (T4) of zeolite. The experimental design was a complete block with four replicates. The percentage (%) of water retention in the soil was quantified on February 11, February 25, March 31 and April 12, 2021. Prior to the establishment of the experiment the soil (0-30 cm) was characterized by quantifying pH, electrical conductivity (EC), organic matter (OM), N, P, carbonates, bicarbonates and chlorides.","PeriodicalId":326700,"journal":{"name":"Revista de Energía Química y Física","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116513138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.35429/jcpe.2022.27.9.8.14
B. Castillo‐Téllez, M. Castillo-Téllez, Gerardo Alberto Mejía Pérez, Carlos Jesahel Vega Gómez
Epazote (Chenopodium ambrosioides L.) is a plant used as a condiment in food and has antioxidant properties promoting human health. Unfortunately, epazote is highly perishable due to its high moisture content. In this work, epazote solar drying is carried out using two different dryers: an indirect solar dryer with a titanium oxide cover (SIT) and a direct one with a polycarbonate cover (SDP) to increase its shelf life. Titanium oxide is a novel material with thermal properties helping solar drying by allowing the preservation of epazote's medicinal and organoleptic properties, which is very sensitive to solar radiation. The drying kinetics show that both dryings were carried out in 2.6 hours, obtaining a final humidity of 0.9 and 0.4 g water/g ss in SIT and SDP, respectively. The highest drying rate (27 g water/g ss∙ hr) was achieved with the SIT. The model that best fit the drying kinetics for both cases was the Weibull model, with a minimum r2 of 0.9979. The colorimetric study found that the SIT allows a superior quality in the product with an ∆E of 9.56
{"title":"Epazote solar drying under different conditions: Kinetics, modeling, and colorimetry","authors":"B. Castillo‐Téllez, M. Castillo-Téllez, Gerardo Alberto Mejía Pérez, Carlos Jesahel Vega Gómez","doi":"10.35429/jcpe.2022.27.9.8.14","DOIUrl":"https://doi.org/10.35429/jcpe.2022.27.9.8.14","url":null,"abstract":"Epazote (Chenopodium ambrosioides L.) is a plant used as a condiment in food and has antioxidant properties promoting human health. Unfortunately, epazote is highly perishable due to its high moisture content. In this work, epazote solar drying is carried out using two different dryers: an indirect solar dryer with a titanium oxide cover (SIT) and a direct one with a polycarbonate cover (SDP) to increase its shelf life. Titanium oxide is a novel material with thermal properties helping solar drying by allowing the preservation of epazote's medicinal and organoleptic properties, which is very sensitive to solar radiation. The drying kinetics show that both dryings were carried out in 2.6 hours, obtaining a final humidity of 0.9 and 0.4 g water/g ss in SIT and SDP, respectively. The highest drying rate (27 g water/g ss∙ hr) was achieved with the SIT. The model that best fit the drying kinetics for both cases was the Weibull model, with a minimum r2 of 0.9979. The colorimetric study found that the SIT allows a superior quality in the product with an ∆E of 9.56","PeriodicalId":326700,"journal":{"name":"Revista de Energía Química y Física","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115032081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-30DOI: 10.35429/jcpe.2022.26.9.30.37
Beatriz Martínez-Pérez, Miguel MORALES-RODRIGUEZ, Ricardo CISNEROS-TAMAYO, Elizabeth PIÑÓN-SEGUNDO
In this study, a spectrophotometric method was developed in order to quantify CLT from polymeric nanoparticles of poly(lactic-glycolic acid) (PLGA) modified on the surface with chitosan (CTS) for vaginal administration in the treatment of vaginitis. The parameters of specificity, linearity, repeatability, quantification and detection limits were evaluated. The proposed dissolution medium was Simulated Vaginal Fluid solution pH= 4.2 with Sodium Lauryl Sulfate 0.5% (p/v). The wavelength used for CLT quantification was 265 nm. The results obtained meet the acceptance criteria specified in the Analytical Method Validation Guide (García et al., 2002). In addition, the spectrophotometric method developed allowed us to determine that the percentage of CLT encapsulated in the nanoparticles was 85.64% (w/w). Finally, it is concluded that the analytical method developed is reliable, low cost and easy to perform to quantify CLT from polymeric nanoparticles of PLGA and CTS.
本研究建立了一种分光光度法，用于定量用壳聚糖(CTS)修饰的聚乳酸-乙醇酸(PLGA)聚合物纳米颗粒阴道给药治疗阴道炎。对特异性、线性、重复性、定量、检出限等参数进行评价。建议的溶解介质为模拟阴道液溶液，pH= 4.2，月桂醇硫酸钠0.5% (p/v)。CLT定量所用波长为265 nm。所得结果符合《分析方法验证指南》(García et al.， 2002)规定的可接受标准。此外，采用分光光度法测定了CLT包封在纳米颗粒中的百分比为85.64% (w/w)。最后得出结论，该分析方法可靠，成本低，易于定量PLGA和CTS聚合物纳米颗粒的CLT。
{"title":"A spectrophotometric method for the quantification of clotrimazole from polymeric nanoparticles to Candida albicans vaginal infections treatment","authors":"Beatriz Martínez-Pérez, Miguel MORALES-RODRIGUEZ, Ricardo CISNEROS-TAMAYO, Elizabeth PIÑÓN-SEGUNDO","doi":"10.35429/jcpe.2022.26.9.30.37","DOIUrl":"https://doi.org/10.35429/jcpe.2022.26.9.30.37","url":null,"abstract":"In this study, a spectrophotometric method was developed in order to quantify CLT from polymeric nanoparticles of poly(lactic-glycolic acid) (PLGA) modified on the surface with chitosan (CTS) for vaginal administration in the treatment of vaginitis. The parameters of specificity, linearity, repeatability, quantification and detection limits were evaluated. The proposed dissolution medium was Simulated Vaginal Fluid solution pH= 4.2 with Sodium Lauryl Sulfate 0.5% (p/v). The wavelength used for CLT quantification was 265 nm. The results obtained meet the acceptance criteria specified in the Analytical Method Validation Guide (García et al., 2002). In addition, the spectrophotometric method developed allowed us to determine that the percentage of CLT encapsulated in the nanoparticles was 85.64% (w/w). Finally, it is concluded that the analytical method developed is reliable, low cost and easy to perform to quantify CLT from polymeric nanoparticles of PLGA and CTS.","PeriodicalId":326700,"journal":{"name":"Revista de Energía Química y Física","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114573935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-30DOI: 10.35429/jcpe.2022.26.9.17.29
Lorena LAGOS-LÓPEZ, M. Cruz-Gómez, María Maura Margarita TEUTLI-LEÓN, Genaro Roberto LÓPEZ-AGUILAR
The current need to reduce environmental degradation and seek environmentally friendly packaging alternatives has encouraged research into new products based on biological resources such as biopolymers (polysaccharides), such as the starch in potatoes. The objective of this research was to identify the properties of potato peel joined with a natural plasticizer obtained from tree exudate Capparis scabrida as a blueberry packaging alternative, which presents sensitivity to deterioration, a suitable packaging with an abundance of starch can delay this phenomenon, on the other hand, synthetic polymer packaging deteriorates the product. A mixed analysis was performed, applying the quantification and estimation of the biopolymer for the packaging’s development according to the control variables such as biodegradability, functionality, breathing rate, and weight loss of the fruit. The technical data obtained from the biopolymer were the basis of the decision-making process for the implementation of packaging as a replacement for existing synthetic polymers. The characterization will be the reason for future works for its optimization.
{"title":"Organic packaging proposal of biopolymer base starch-exudate tree Capparis scabrida for blueberry’s conservation","authors":"Lorena LAGOS-LÓPEZ, M. Cruz-Gómez, María Maura Margarita TEUTLI-LEÓN, Genaro Roberto LÓPEZ-AGUILAR","doi":"10.35429/jcpe.2022.26.9.17.29","DOIUrl":"https://doi.org/10.35429/jcpe.2022.26.9.17.29","url":null,"abstract":"The current need to reduce environmental degradation and seek environmentally friendly packaging alternatives has encouraged research into new products based on biological resources such as biopolymers (polysaccharides), such as the starch in potatoes. The objective of this research was to identify the properties of potato peel joined with a natural plasticizer obtained from tree exudate Capparis scabrida as a blueberry packaging alternative, which presents sensitivity to deterioration, a suitable packaging with an abundance of starch can delay this phenomenon, on the other hand, synthetic polymer packaging deteriorates the product. A mixed analysis was performed, applying the quantification and estimation of the biopolymer for the packaging’s development according to the control variables such as biodegradability, functionality, breathing rate, and weight loss of the fruit. The technical data obtained from the biopolymer were the basis of the decision-making process for the implementation of packaging as a replacement for existing synthetic polymers. The characterization will be the reason for future works for its optimization.","PeriodicalId":326700,"journal":{"name":"Revista de Energía Química y Física","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129919859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-30DOI: 10.35429/jcpe.2022.26.9.8.16
LA CONTRERAS-DE, M. Cruz, GARCÍA-GONZÁLEZ N †´´, ENRÍQUEZ-PÉREZ ´´, Ma Ángeles´
In the present work, synthesis and characterization of a Hydroxyapatite (HAp)/Zinc Oxide (ZnO)-based composite in proposed. The Egg-shell (ES) is used as Hydroxyapatite source. We pretend to take advantage of photocatalytic activity of both materials. This composite can be applied in mineralization of organic dyes in waste water. The methodology followed for the preparation of the composite was carry out a Sol-gel of precursor ZnO synthesis, after, it was mixed with the previously synthesized Hydroxyapatite and calcinated at 650 °C. Later, all materials were characterized using of Raman Spectroscopy and X-Ray Diffraction (XRD), to determine the crystalline phases present; Scanning Electron Microscopy (SEM) to obtain the morphology; Energy Dispersive Spectroscopy (EDS) to determine elemental composition. It was possible to synthesize a HAp/ZnO composite, the characterization showed that it was obtained a composite with carbonated hydroxyapatite Type B. It is important to highlight that the method of composite synthesis, it was not a homogeneous synthesis, it is proposed to look for another impregnation method.
{"title":"Preparation advances of hydroxyapatite/ZnO composite using egg-shell","authors":"LA CONTRERAS-DE, M. Cruz, GARCÍA-GONZÁLEZ N †´´, ENRÍQUEZ-PÉREZ ´´, Ma Ángeles´","doi":"10.35429/jcpe.2022.26.9.8.16","DOIUrl":"https://doi.org/10.35429/jcpe.2022.26.9.8.16","url":null,"abstract":"In the present work, synthesis and characterization of a Hydroxyapatite (HAp)/Zinc Oxide (ZnO)-based composite in proposed. The Egg-shell (ES) is used as Hydroxyapatite source. We pretend to take advantage of photocatalytic activity of both materials. This composite can be applied in mineralization of organic dyes in waste water. The methodology followed for the preparation of the composite was carry out a Sol-gel of precursor ZnO synthesis, after, it was mixed with the previously synthesized Hydroxyapatite and calcinated at 650 °C. Later, all materials were characterized using of Raman Spectroscopy and X-Ray Diffraction (XRD), to determine the crystalline phases present; Scanning Electron Microscopy (SEM) to obtain the morphology; Energy Dispersive Spectroscopy (EDS) to determine elemental composition. It was possible to synthesize a HAp/ZnO composite, the characterization showed that it was obtained a composite with carbonated hydroxyapatite Type B. It is important to highlight that the method of composite synthesis, it was not a homogeneous synthesis, it is proposed to look for another impregnation method.","PeriodicalId":326700,"journal":{"name":"Revista de Energía Química y Física","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122002808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-15DOI: 10.35429/jcpe.2022.26.9.1.7
Nathaniel Morales-Centla, Richard Torrealba-Meléndez, Edna Iliana Tamariz-Flores, Mario López-López
This paper presents a study concerning the design of transmission lines using graphene. This study aims to obtain the thickness and conductivity values of graphene. These values were obtained by performing simulations of the skin effect and sheet resistance for different conductivities and thicknesses of graphene. Finally, once the values were obtained, simulations of microstrip and coplanar lines were carried out to analyze the effect of the graphene. In addition, a comparison between graphene lines and copper lines was performed.
{"title":"Microstrip and coplanar lines with graphene","authors":"Nathaniel Morales-Centla, Richard Torrealba-Meléndez, Edna Iliana Tamariz-Flores, Mario López-López","doi":"10.35429/jcpe.2022.26.9.1.7","DOIUrl":"https://doi.org/10.35429/jcpe.2022.26.9.1.7","url":null,"abstract":"This paper presents a study concerning the design of transmission lines using graphene. This study aims to obtain the thickness and conductivity values of graphene. These values were obtained by performing simulations of the skin effect and sheet resistance for different conductivities and thicknesses of graphene. Finally, once the values were obtained, simulations of microstrip and coplanar lines were carried out to analyze the effect of the graphene. In addition, a comparison between graphene lines and copper lines was performed.","PeriodicalId":326700,"journal":{"name":"Revista de Energía Química y Física","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125425393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-03DOI: 10.35429/jcpe.2021.24.8.1.7
M. Salazar-Hernández, E. Elorza-Rodríguez, J. Mendoza-Miranda, L. Alvarado-Montalvo
This paper shows the syntheses and use of hybrid porous silica materials (UGM-triamin) in the adsorption of Cu (I) of the cyanidation effluents of gold and silver. Studies of adsorption of Cu (I) in synthetic solutions of Cu-CN a pH of 11 and at a concentration ratio of 1: 5 Cu: CN, simulating the effluents of cyanide process gold and silver ores, showed maximum adsorption capacity of 7.54 mg of Cu (I) per gram of material and favorable adsorption according to the Langmuir model (RL of 0.31 to 0.41). The evaluation of the adsorption capacity of the material with real solutions of cyanide, showed 95% removal of copper in the effluent cyanide and 68.5% selectivity for the adsorption of copper. It has been observed free cyanide destruction in the system during adsorption of copper, so that the oxidation of free cyanide may be linked to the mechanism of adsorption of copper.
{"title":"Cu(I) removal using mesoporous silica (UGM-triamin)","authors":"M. Salazar-Hernández, E. Elorza-Rodríguez, J. Mendoza-Miranda, L. Alvarado-Montalvo","doi":"10.35429/jcpe.2021.24.8.1.7","DOIUrl":"https://doi.org/10.35429/jcpe.2021.24.8.1.7","url":null,"abstract":"This paper shows the syntheses and use of hybrid porous silica materials (UGM-triamin) in the adsorption of Cu (I) of the cyanidation effluents of gold and silver. Studies of adsorption of Cu (I) in synthetic solutions of Cu-CN a pH of 11 and at a concentration ratio of 1: 5 Cu: CN, simulating the effluents of cyanide process gold and silver ores, showed maximum adsorption capacity of 7.54 mg of Cu (I) per gram of material and favorable adsorption according to the Langmuir model (RL of 0.31 to 0.41). The evaluation of the adsorption capacity of the material with real solutions of cyanide, showed 95% removal of copper in the effluent cyanide and 68.5% selectivity for the adsorption of copper. It has been observed free cyanide destruction in the system during adsorption of copper, so that the oxidation of free cyanide may be linked to the mechanism of adsorption of copper.","PeriodicalId":326700,"journal":{"name":"Revista de Energía Química y Física","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115594623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.35429/jcpe.2021.24.8.22.33
Rosaura Peña, Lourdes Hurtado, R. Romero, R. Natividad
The continuous combustion of non-renewable fossil fuels and the depletion of the natural resources from which they come and, consequently, the continuous increase of carbon dioxide (CO2) emissions into the atmosphere are intensifying the search for the conversion of carbon dioxide to fuels and value-added chemicals, with the main objective of reducing emissions and creating renewable and sustainable energy sources. In this sense, there is a lot of interest in the photocatalytic reduction of CO2 with H2O, mainly using solar energy, which is a renewable source with a continuous and easily available light supply. Recent progress in this area has focused on the development of promising photocatalysts, primarily based on TiO2. In this context, this article analyzes: (i) the role of CO2 in the treatment of problems related to energy and global warming, (ii) the fundamental knowledge of the photocatalytic reduction of CO2, (iii) the role of the catalysts of copper-doped TiO2 in the photocatalytic transformation CO2; as well as (iv) emerging and crucial opportunities for future research employing Cu-TiO2 photocatalysts; mentioning the most up-to-date relevant references.
{"title":"Reduction of CO2 photocatalyzed by Cu-TiO2-based catalysts: a review","authors":"Rosaura Peña, Lourdes Hurtado, R. Romero, R. Natividad","doi":"10.35429/jcpe.2021.24.8.22.33","DOIUrl":"https://doi.org/10.35429/jcpe.2021.24.8.22.33","url":null,"abstract":"The continuous combustion of non-renewable fossil fuels and the depletion of the natural resources from which they come and, consequently, the continuous increase of carbon dioxide (CO2) emissions into the atmosphere are intensifying the search for the conversion of carbon dioxide to fuels and value-added chemicals, with the main objective of reducing emissions and creating renewable and sustainable energy sources. In this sense, there is a lot of interest in the photocatalytic reduction of CO2 with H2O, mainly using solar energy, which is a renewable source with a continuous and easily available light supply. Recent progress in this area has focused on the development of promising photocatalysts, primarily based on TiO2. In this context, this article analyzes: (i) the role of CO2 in the treatment of problems related to energy and global warming, (ii) the fundamental knowledge of the photocatalytic reduction of CO2, (iii) the role of the catalysts of copper-doped TiO2 in the photocatalytic transformation CO2; as well as (iv) emerging and crucial opportunities for future research employing Cu-TiO2 photocatalysts; mentioning the most up-to-date relevant references.","PeriodicalId":326700,"journal":{"name":"Revista de Energía Química y Física","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134240167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：