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Heavy Metals Monitoring in Sediments from Lerma River in West-Central Mexico

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American Journal of Analytical Chemistry 2018年第2期9卷 77-87页

作者： Héctor Hernández-Mendoza María Judith Ríos-Lugo Elizabeth Teresita Romero-Guzmán Lázaro Raymundo Reyes-Gutiérrez Michael E. Ketterer Instituto nacional de investigaciones nucleares Ocoyoacác México Universidad del centro de México San Luis Potosí México Universidad Autónoma de San Luis Potosí San Luis Potosí México División of ciencias Básicas e ingeniería Departmentof Recursos de la Tierra Universidad Autónoma Metropolitana-Lerma (UAM-L) Lerma México department of Chemistry Metropolitan State University of Denver Denver USA

The aim of this work was to carry out monitoring of some elements considered toxic in sediments from Lerma River. An analytical method was optimized in our laboratory for quantification of nickel (ni), cobalt (Co), manganese (Mn), arsenic (As), chromium (Cr) and lead (Pb) by using Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). Ten sediments were collected along the Lerma River at variable distances and at 20 cm depth. Samples were heated to 60°C to dryness, followed by separation of particle size using a 74-μ no. 200 mesh for homogeneity purposes. 0.2 g of sample underwent microwave-assisted acid digestion, followed by plate evaporation. The samples were dissolved in 10 mL with HnO3 at 5% v/v for ICP-OES analysis. A certified reference material (CRM 8704) was used to evaluate the method’s accuracy and precision. The method showed linearity, precision, accuracy, and limits of quantification and detection acceptable for protocol validation of analytical method. The average results obtained in recovery of CRM 8704 were ~90% and precision was below 7% for all elements. Levels concentration of As, Cr, Pb show high pollution in A1, A7 and A8 sites. Therefore, Co, Mn and ni can be considered in this study as normal values. In conclusion, concentration levels of As, Cr, Pb in sediments were high according to US-EPA and nOM-147-SEMARnAT/SSA1-2004. The presence of these heavy metals in Lerma River could be due mainly for the emitted from industries, such as pharmaceutical, automotive, metal mechanics and tannery, and urban residual water. Finally, the method developed using ICP-OES has enabled monitoring of these elements in sediments from Lerma River, with possible applications in a routine analytical laboratory.

关键词： ICP-OES Lerma River Sediments US-EPA

Multi-label Text Classification with a Robust Label dependent Representation

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Multi-label Text Classification with a Robust Label Dependen...

Urban Soils from non-pavment Streets and PM10 in Air Quality Transboudary Projects in Reynosa,Tamaulipas,Mexico

2010 Third Pacific-Asia Conference on Web Mining and Web-based Application (WMWA 2010)

作者： Rodrigo Alfaro Héctor Allende departamento de Informática Universidad Técnica Federico Santa María and Escuela de Ingeniería Informática Pontificia Universidad Católica de Valparaíso departamento de Informática Universidad Técnica Federico Santa María and Facultad de Ingeniería Universidad Adolfo Ibáez

ISBN: (纸本)9781424497232

Automatic text classification is the task of assigning unseen documents to a predefined set of classes or categories. Text Representation for classification have been traditionally approached with *** due to its simplicity and good performance. Multi-label automatic text classification has been traditionally tackled in the literature either by transforming the problem to apply binary techniques or by adapting binary algorithms to work with multiple labels. We present ***, a novel text representation for the multi-label classification approach. Our proposal focuses on modifying the data set input to the algorithm, differentiating the input by the label to evaluate. Performance of *** was tested with a known benchmark and compared to alternative techniques. The results show improvement compared to alternative approaches in terms of Hamming loss.

关键词： Multi-label Text classification Text representation Machine learning.

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Urban Soils from Non-pavment Streets and PM10 in Air Quality...

Use of geospatial tools to predict the risk of contamination by SARS-CoV-2 in urban cemeteries

2011 2nd International Conference on Biology,Environment and Chemistry（ICBEC 2011）

作者： Rodríguez–Espinosa P.F. Morales-García S.S. Victoria Susana Villalba Salgado centro Interdisciplinario de investigaciones y Estudios sobre Medio Ambiente y desarrollo (CIIEMAD) Instituto Politécnico Nacional(IPN).Calle 30 de Junio de 1520 Barrio la Laguna TicománDel.Gustavo A.MaderoC.P.07340México D.F.México Escuela Superior de ingeniería Química e Industrias Extractivas(ESIQIE) Instituto Politécnico Nacional(IPN)UPALM Edificio 7 1er.Piso col. ZacatencoDel.Gustavo A.MaderoC.P.07738México D.F.México

The present work is related to suspended matter in the air（PM10） and the soils from non-paving streets from the border City of Reynosa,Tamaulipas,*** were collected from PM10 and soils from non-paving *** were analyzed in Scanning Electron Microscope（SEM）,Energy Dispersive Spectroscopy（EDS） on the SEM and X-Ray Diffraction（XRD）.The results of the present work established a correlation of the native materials of soils,with a dominion of the crystalline phases of quartz,calcite;with the presence of potash feldspars and calcium and clays of muscovite *** studied mineral phases in the soils were found in the *** minerals detected in soils and PM10 are regionalized,and they depend on the condition of the dominant wind *** present project was technically supported by the program "Air Quality and Street Paving Project"（transboundary project） for the city of Reynosa,Tamaulipas,Mexico（1.7 x106 m2 of hydraulic and asphaltic pavement）,which obtained BECC（Mexico-USA） Certification the 06212006 and 05202008 with ID-470（3.0 x106 m2 of hydraulic and asphaltic pavement）.

关键词： PM10 crystalline phases soils of non-paving streets transboundary project Reynosa Tamaulipas México.

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Geoscience Frontiers 2022年第6期13卷 331-346页

作者： Paloma Carollo Toscan Alcindo neckel Laércio Stolfo Maculan Cleiton Korcelski Marcos L.SOliveira Eliane Thaines Bodah Brian William Bodah Henrique Aniceto Kujawa Affonso Celso Gonalves Faculdade Meridional IMED304Passo FundoRS 99070-220Brazil department of Civil and Environmental Universidad de la CostaCUCCalle 58#55–66BarranquillaAtlánticoColombia Universidad de Lima Departamento de Ingeniería civil y ArquitecturaAvenida Javier Prado Este 4600Santiago de Surco 1503Peru State University of new york Onondaga Community College4585 West SenecaTurnpikeSyracuseNY 13215USA Thaines and Bodah Center for Education and development 840 South Meadowlark LaneOthelloWA 99344USA University of Perugia Piazza Università106123 PerugiaItaly State University of Western Paraná–UnIOESTE Center of Agrarian SciencesRua Pernambuco1777CentroMarechal Cândido RondonPR 85960-000Brazil

Urban cemeteries are increasingly surrounded by areas of high residential density as urbanization continues world-wide. With increasing rates of mortality caused by the novel coronavirus, SARS-CoV-2,urban vertical cemeteries are experiencing interments at an unprecedented rate. Corpses interred in the 3rd to 5th layer of vertical urban cemeteries have the potential to contaminate large adjacent *** general objective of this manuscript is to analyze the reflectance of altimetry, normalized difference vegetation index(nDVI) and land surface temperature(LST) in the urban cemeteries and neighbouring areas of the City of Passo Fundo, Rio Grande do Sul, Brazil. It is assumed that the population residing in the vicinity of these cemeteries may be exposed to SARS-CoV-2 contamination through the displacement of microparticles carried by the wind as a corpse is placed in the burial niche or during the first several days of subsequent fluid and gas release through the process of decomposition. The reflectance analyses were performed utilizing Landsat 8 satellite images applied to altimetry, nDVI and LST, for hypothetical examination of possible displacement, transport and subsequent deposition of the SARS-CoV-2 virus. The results showed that two cemeteries within the city, cemeteries A and B could potentially transport SARS-CoV-2 of nanometric structure to neighboring residential areas through wind *** two cemeteries are located at high relative altitudes in more densely populated regions of the *** nDVI, which has been shown to control the proliferation of contaminants, proved to be insufficient in these areas, contributing to high LST values. Based on the results of this study, the formation and implementation of public policies that monitor urban cemeteries is suggested in areas that utilize vertical urban cemeteries in order to reduce the further spread of the SARS-CoV-2 virus.

关键词： Remote sensing Reflectance temperature Atmospheric contamination Urban environment SARS-CoV-2

development of a Construction Material for Indoor and Outdoor, Metakaolinite-Based Geopolymer, with Environmental Properties

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材料科学与工程（中英文A版） 2019年第4期9卷 131-142页

作者： M.Mondragón-Figueroa Héctor.R.Guzmán-Carrillo MiguelÁngel Rico JoséLuis.Reyez-Araiza Jorge.Pineda-Piñón Edgar J.López-naranjo María C.Columba-Palomares Jóse.M.López-Romero Josè.Ramón Gasca-Tirado Alejandro.Manzano-Ramírez CInVESTAV-Querétaro Libramiento Norponiente#2000Fraccionamiento Real de JuriquillaQuerétaro 76230Qro.México Facultad de Química Universidad Autónoma de Querétaro centro de estudios Académicos sobre contaminación AmbientalQuerétaro 76010Qro.México DIPFI Facultad de IngenieríaUniversidad Autónoma de QuerétaroC.U.Cerro de las CampanasCentroQuerétaro 76010Qro.México Instituto Politécnico nacional Centro de Investigación en Ciencia Aplicada y Tecnología AvanzadaUnidad QuerétaroCerro Blanco No.141Colinas del CimatarioQuerétaro76090Qro.México DIP-CUCEI Universidad de GuadalajaraJoséGuadalupe Zuno#48Los BelenesZapopan 45100Jal.México Facultad de Farmacia Universidad Autónoma del Estado de MorelosAv.Universidad#1001Cuernavaca 62209Mor.México departamento de ingeniería Universidad de GuanajuatoGuanajuato 36000México

Environmental problems that came from the human activity have many facets,since pollution of the atmosphere arises from vehicles,industrial emissions while pollution of water could be from organic compounds,pesticides *** can cause serious health effects,such as respiratory diseases,including asthma and lung ***,in the present work,a kinetic study on the effective adsorption and photo degradation of methylene blue(MB)dye,under ultraviolet A(UVA)irradiation of an alkali activated inorganic polymer(geopolymer)with homogeneously dispersed titanium dioxide(TiO2)micro-particles is *** addition,antimicrobial testing of the alkali activated TiO2 material was performed showing a bacteriostatic effect.

关键词： Heterogeneous photocatalysis semiconductor alkali activated bacteriostatic effect

Improving Compost Process Efficiency by Leachates Inoculation and Shredding of the Organic Fraction of Municipal Solid Waste at Bordo Poniente Composting Plant,Mexico City

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Journal of Environmental Science and Engineering(A) 2021年第5期10卷 177-183页

作者： Francisco Javier Barrón-Santos Ma.Eugenia Gutiérrez-Castillo Luis Raúl Tovar-Gálvez Ma.Teresa núñez-Cardona Ricardo Estrada-núñez Claudia Rodríguez Tapia Alfonso Espitia-Cabrera departamento de Posgrado Salud OcupacionalSeguridad e HigieneEscuela Nacional de Medicina y HomeopatíaInstituto Politécnico NacionalCiudad de México 07320México departamento de Biociencias e ingeniería Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y DesarrolloInstituto Politécnico NacionalCiudad de México 07340México departamento El Hombre y su Ambiente Universidad Autónoma Metropolitana XochimilcoCiudad de México 04960México Secretaría de Obras y Servicios Gobierno de la Ciudad de MéxicoCiudad de México 06000México Unidad Profesional Interdisciplinaria de Biotecnología Instituto Politécnico NacionalCiudad de México 07340México departamento de Energía Universidad Autónoma Metropolitana AzcapotzalcoCiudad de México 02200México

Management of MSW(Municipal Solid Waste)is a major downside in most of the biggest *** composting of the organic fraction of MSW is one of the oldest and simplest ways of organic waste *** is a self-heating biological conversion that generates appropriate finished merchandise such as soil conditioner or *** City generates about 12,500 ton/day of MSW,44%of it is food scraps and yard trimmings which are the OFMSW(Organic Fraction of Municipal Solid Waste),2,500 ton/day of it is composted at the BPCP(Bordo Poniente Composting Plant)yielding 500 ton/day of *** purpose of this study was to evaluate three treatments to accelerate the composting process,so eventually the city could increase the amount of the OFMSW at *** compared three different treatments;one of them showed a significant reduction in time of the composting process(p≤0.05)i.e.,it took less time to reach the thermophilic stage,maturity and stabilization *** was achieved at 35 days and 60 days to *** conclude that shredding the feedstock plus leachate inoculum addition at the beginning of the process,reduces the composting time in about 61%with respect to the time it takes at the BPCP,where lasted 90 days.

关键词： Composting organic fraction municipal solid waste inoculum leachates size particle

PM2.5 Estimation with the WRF/Chem Model,Produced by Vehicular Flow in the Lima Metropolitan Area

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Open Journal of Air Pollution 2018年第3期7卷 215-243页

作者： Warren Reátegui-Romero Odón R.Sánchez-Ccoyllo María de Fatima Andrade Aldo Moya-Alvarez School of Sciences Universidad Nacional Agraria La Molina(UNALM)LimaPeru School of Chemical Engineering and Textile(FIQT) Universidad Nacional de Ingeniería(UNI)RímacLimaPeru School of Environmental Engineering Universidad Nacional Tecnológica deLimaSur(UNTELS)Villa El SalvadorLimaPeru department of Atmospheric Sciences at the Institute of Astronomy Geophysics and Atmospheric Sciences(IAG)University of Sao PauloSao PauloBrazil centro Meteorológico Provincial Santa Clara Cuba Instituto Geofísico del Peru(IGP) Calle Badajoz N°169 Urb.Mayorazgo IV Etapa AteLimaPeru

Lima is the capital of the Republic of Peru. It is the most important city in the country and as other Latin America metropolises have multiple problems, including air pollution due to particulate material above air quality standards, emitted by 1.6 million vehicles. The “on-line” coupled model of meteorology and chemistry of transport and meteorological/chemistry, WRF/Chem (Weather and Research Forecasting with Chemistry) has been used in the Lima Metropolitan Area, and validated against data observed at ground level with ten air quality stations of the national Service of Meteorology and Hydrology for the year 2016. The goal of this study was to estimate the concentration of PM2.5 particulate matter in the months of February and July of 2016. In both months, the model satisfactorily predicts temperature and relative humidity. The average observed PM2.5 concentrations in the month of July are higher than in February, probably because the relative humidity in July is greater than the relative humidity in February. In the months of February and July the standard observed deviations of the model have a factor of 2.4 and 3.7 respectively, indicating a greater dispersion in the data of the model. In the month of July, the model captures the characteristics of transport, shows characteristic peaks during peak hours, therefore, the model estimates transport behavior better in July than in February. The quality of the air is strongly influenced by the vehicular transport. The PM2.5 particulate material in February had an average bias that varied from [?13.2 to 4.4 μg/m3] and in July [?9.63 to 11.65 μg/m3] and a normalized average bias in February that varied from [?0.68 to 0.43] and in July of [?0.46 to 0.48].

关键词： Air Quality Aerosol WRF/Chem Model PM2.5 Lima-Peru