Remoción de Flúor en Agua Potable Utilizando Zeolita Natural PDF Download

Author: Agustín Montiel Cota
Publisher: Eae Editorial Academia Espanola
ISBN: 9783659064845
Category :
Languages : es
Pages : 68

View

Book Description
En regiones aridas de Mexico, donde el agua es escasa y se extrae de pozos profundos, el exceso de concentracion de fluor de forma natural en el agua para consumo humano, ha provocado un problema de salud publica, la fluorosis dental. La Ciudad de Hermosillo, Sonora presenta riesgo en zonas donde la concentracion de fluor en agua potable es muy alta, con valores hasta 7.8 mgL-1, el contenido maximo por normatividad debe ser 1.5 mgL-1. Ante la necesidad de eliminar el exceso de fluor, se planteo como alternativa el uso de zeolitas naturales, minerales abundantes y disponibles en el Estado de Sonora, con bajo costo. En este estudio, se propone tratamiento de acidificacion a las zeolitas para mejorar adsorcion de fluoruros, asi como condiciones de operacion para eliminar o alcanzar la concentracion optima de fluor en agua potable. Por lo tanto, se espera que las Instituciones gubernamentales unifiquen criterios sobre presencia de fluoruros en el agua potable que se abastece para consumo humano, para evitar riesgos a la salud especialmente en la poblacion infantil."

Author: Dr Manuel Pi N. Miramontes
Publisher: Eae Editorial Academia Espanola
ISBN: 9783844349375
Category :
Languages : es
Pages : 120

View

Book Description
El fluor es conocido como un contaminante inorganico que se encuentra presente en el agua de consumo humano en distintos lugares del mundo. Mexico no es la excepcion ya que se ha detectado la presencia de fluor en extensas zonas al norte del pais. La ciudad de Chihuahua esta situada al norte de Mexico, en un punto geografico correspondiente a una zona desertica en la que como caracteristica particular destaca su baja precipitacion pluvial. La mayor parte del agua que se suministra a la poblacion es agua subterranea, siendo esta dependiente de los estratos litologicos que a su vez influyen de terminantemente en la calidad misma de este recurso. En algunas fuentes de suministro de agua de la ciudad se han observado concentraciones de fluor superiores al nivel maximo permitido por la Norma Oficial Mexicana (NOM-127-SSA1-1994) que es de 1.5 mg/L. Investigaciones realizadas han demostrado que concentraciones por encima de dicho nivel pueden provocar fluorosis dental y que concentraciones mayores de 4.0 mg/L producen una afeccion a los huesos conocida como osteoesclerosis. En este estudio se analizan diferentes metodos de tratamiento para la eliminacion de fluor en agua potable.

Author: Flérida Adriana Mejía Zamudio
Publisher: Ewe Editorial Acad MIA Espa Ola
ISBN: 9783659004131
Category :
Languages : es
Pages : 64

View

Book Description
El arsenico es un elemento toxico para el organismo humano. No solo en concentraciones altas, causa efectos agudos que pueden llegar a ser letales, tambien la exposicion durante un largo periodo a bajas concentraciones relativas de arsenico, tiene efectos negativos cronicos para la salud, como cancer en la piel por la ingestion prolongada de aguas con arsenico. Las zeolitas naturales se emplean, sobre todo para minimizar el impacto de algunos contaminantes en el medio ambiente. Numerosos investigadores han estudiado durante decadas la sintesis de las zeolitas, asi como sus estructuras y propiedades. Como resultado, se han obtenido un gran numero de patentes sobre la preparacion de diferentes tipos de zeolitas y sobre catalizadores basados en ellas, asi como toda una serie de aplicaciones industriales de gran interes El presente trabajo propone desarrollar una metodologia para modificar una zeolita natural, tipo chabazita, con hidroxido de magnesio, y determinar la capacidad para disminuir las concentraciones de arsenico en agua para consumo humano."

Author: Gabriela Dotro
Publisher: IWA Publishing
ISBN: 9781789062519
Category : Science
Languages : es
Pages : 176

View

Book Description
Humedales para tratamiento es el séptimo volumen de la serie “Tratamiento biológico de aguas residuales” (en inglés “Biological Waste Water Treatment Series”), que provee una presentación de vanguardia sobre la ciencia y tecnología del tratamiento de aguas residuales. Los principales tipos de sistemas de humedales son tratados en este volumen, a saber: (i) Humedales de flujo subsuperficial horizontal, (ii) Humedales de flujo vertical; (iii) Humedales de flujo vertical tipo francés; (iv) Humedales intensificados; (v) Humedales de flujo libre; (vi) otras aplicaciones de los humedales para tratamiento. El libro presenta en forma clara y didáctica, los conceptos básicos, los principios de la tecnología, desempeños esperados, criterios de diseño, ejemplos de diseño, aspectos constructivos y guías para la operación. El libro ha sido escrito en su versión inglesa, y traducido al castellano, por un equipo internacional de expertos en el campo de los humedales para tratamiento.

Author: Mohammad Hadi Dehghani
Publisher: Elsevier
ISBN: 0323856462
Category : Science
Languages : en
Pages : 236

View

Book Description
Green Technologies for the Defluoridation of Water focuses on the application of green technologies for the defluoridation of water using adsorption processes and nanoadsorbents. Chapters cover the environmental and health effects of fluoride presence in ambient air, food, water, soil and vegetation, focus on approaches for analytical methods to determine the presence of fluoride in water, review various types of conventional and advanced techniques used for removal, focus on adsorption as a green technology, review various types of adsorbents, and emphasize a techno-economic assessment with respect to conventional and non-conventional technologies. This book provides readers with comprehensive methods and applications, while also presenting the global impacts of fluoride ion on the environment, including in drinking water, food, air, soil and vegetables. The authors compare different defluoridation technologies in detail, providing researchers in environmental science and nanotechnology fields with the information they need to create solutions on how to safely remove fluoride from water in a sustainable and cost-effective way. Presents the application of green technology for the defluoridation of water using adsorption processes and nanoadsorbents Includes methods for effectively removing fluoride ions from potable water and water bodies Provides techniques that are eco-friendly, without toxic chemicals, and with lower cost options

Author: John M. Guilbert
Publisher: Waveland Press
ISBN: 1478608870
Category : Science
Languages : en
Pages : 1000

View

Book Description
Modern civilizations dependence upon an increasing volume and diversity of minerals makes the search for new ore deposits ever more difficult. Now available from Waveland Press, Guilbert & Parks text presents ideas, principles, and data fundamental for beginning economic geologists to understand the genesis and localization of ore deposits and of the minerals associated with them. The authors comprehensively describe the physical and chemical characteristics of ore deposits and correlate them with environments and conditions of deposition, since ore deposits are best interpreted as extensions of the environments responsible for their enclosing rocks. Examples and illustrations emphasize structural, chemical, and temporal controls and encourage the three-dimensional thinking used by productive explorationists as they face unsolved problems. This upper-level undergraduate text is fully illustrated and meticulously indexed. Its reliable, authoritative coverage assumes an upper-level command of chemistry and physics, as well as mineralogy, petrology, and structural geology. Outstanding features . . . develops and combines the abilities of the explorationist and of the researcher of ore-forming processes structures the geologic descriptions into groupings recognized by researchers and explorers alike builds confidence, revitalizes curiosity, and encourages expanded thinking emphasizes that the days of easy discovery of outcropping ores are not over includes revised, expanded, and updated descriptions of districts

Author: Duong D Do
Publisher: World Scientific
ISBN: 1783262249
Category : Technology & Engineering
Languages : en
Pages : 915

View

Book Description
This book covers topics of equilibria and kinetics of adsorption in porous media. Fundamental equilibria and kinetics are dealt with for homogeneous as well as heterogeneous particles. Five chapters of the book deal with equilibria and eight chapters deal with kinetics. Single component as well as multicomponent systems are discussed. In kinetics analysis, we deal with the various mass transport processes and their interactions inside a porous particle. Conventional approaches as well as the new approach using Maxwell-Stefan equations are presented. Various methods to measure diffusivity, such as the Differential Adsorption Bed (DAB), the time lag, the diffusion cell, chromatography, and the batch adsorber methods are also covered by the book. It can be used by lecturers and engineers who wish to carry out research in adsorption. A number of programming codes written in MatLab language are included so that readers can use them directly to better understand the behavior of single and multicomponent adsorption systems.

Author: Douglas G. Brookins
Publisher: Springer Science & Business Media
ISBN: 3642730930
Category : Science
Languages : en
Pages : 264

View

Book Description
At last geochemists are offered one comprehensive reference book which gives the Eh-pH diagrams for 75 elements found in the earth's surface environment, including transuranic and other radioactive species. For each of these newly calculated diagrams short explanatory texts are added. For the first time the primary elements are considered in water with metal, sulfur, carbon, and other species as appropriate. Furthermore, based on these figures and up-to-date thermodynamic data presented in this reference, researchers can predict the behavior of elements in the surface environment. Geoscientists, chemists and environmental agencies will also benefit from several brief texts on the importance of various elements to problems of radioactive waste disposal.

Author: Peter Ravenscroft
Publisher: John Wiley & Sons
ISBN: 140518602X
Category : Medical
Languages : en
Pages : 625

View

Book Description
Arsenic Pollution summarizes the most current research on the distribution and causes of arsenic pollution, its impact on health and agriculture, and solutions by way of water supply, treatment, and water resource management. Provides the first global and interdisciplinary account of arsenic pollution occurrences Integrates geochemistry, hydrology, agriculture, and water supply and treatment for the first time Options are highlighted for developing alternative water sources and methods for arsenic testing and removal Appeals to specialists in one discipline seeking an overview of the work being done in other disciplines

Author: Jochen Bundschuh
Publisher: CRC Press
ISBN: 0415407710
Category : Science
Languages : en
Pages : 784

View

Book Description
Groundwater resources naturally contain high levels of arsenic in many parts of the world. Over the last two decades, the As-containing groundwater in South-East Asia has received much attention, but the situation is just as crucial in Latin America, where the number of studies is still relatively low, and the extent and severity of As-exposure in the populations has yet to be fully evaluated. This book aims to promote knowledge of the occurrence and genesis of As-rich groundwater in Latin America. It deals with constraints on the mobility of As in groundwater, As-uptake from soil and water by plants, As-propagation through the food chain, human health impacts, and As-removal technologies. Case studies are presented from Argentina, Bolivia, Chile, Ecuador, El Salvador, Mexico, Nicaragua and Peru, amongst others, and are viewed against the background of experience from other world regions. The book is a state-of-art overview of arsenic research in Latin America. It aims to create interest within the Latin American countries affected by the presence of arseniferous aquifers and to increase awareness among administrators, policy makers and company executives. It will also serve to inform the international scientific community, and improve international cooperation on arsenic in groundwater.