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Author: Dr Manuel Pi N. Miramontes Publisher: Eae Editorial Academia Espanola ISBN: 9783844349375 Category : Languages : es Pages : 120
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: Dr Manuel Pi N. Miramontes Publisher: Eae Editorial Academia Espanola ISBN: 9783844349375 Category : Languages : es Pages : 120
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: Agustín Montiel Cota Publisher: Eae Editorial Academia Espanola ISBN: 9783659064845 Category : Languages : es Pages : 68
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: Metcalf & Eddy, Inc., an AECOM Company Publisher: McGraw Hill Professional ISBN: 0071508775 Category : Technology & Engineering Languages : en Pages : 1610
Book Description
An Integrated Approach to Managing the World's Water Resources Water Reuse: Issues, Technologies, and Applications equips water/wastewater students, engineers, scientists, and professionals with a definitive account of the latest water reclamation, recycling, and reuse theory and practice. This landmark textbook presents an integrated approach to all aspects of water reuse _ from public health protection to water quality criteria and regulations to advanced technology to implementation issues. Filled with over 500 detailed illustrations and photographs, Water Reuse: Issues, Technology, and Applications features: In-depth coverage of cutting-edge water reclamation and reuse applications Current issues and developments in public health and environmental protection criteria, regulations, and risk management Review of current advanced treatment technologies, new developments, and practices Special emphasis on process reliability and multiple barrier concepts approach Consideration of satellite and decentralized water reuse facilities Consideration of planning and public participation of water reuse Inside This Landmark Water/Wastewater Management Tool • Water Reuse: An Introduction • Health and Environmental Concerns in Water Reuse • Technologies and Systems for Water Reclamation and Reuse • Water Reuse Applications • Implementing Water Reuse
Author: Sudhakar Srivastava Publisher: Springer ISBN: 9811385874 Category : Technology & Engineering Languages : en Pages : 466
Book Description
Arsenic contamination poses a major environmental problem, especially in Southeast Asian countries like Bangladesh and India. Threatening the health of millions of people due to arsenic’s toxicity and carcinogenicity, the major routes of arsenic exposure for humans are either through drinking water or crops. Rice is the crop most affected by arsenic owing to its cultivation in major arsenic contaminated areas, biogeochemical factors in the soil during rice growth, and specific features of rice that enable it take up more arsenic than other crop plants. This book addresses the problem of arsenic by pursuing a holistic approach. It presents the status quo in different parts of the world (North and South America, Europe, Asia, etc.) and provides essential information on food-related arsenic exposure risks for humans, and possible preventive and curative measures for tackling arsenic poisoning. It covers the arsenic contamination status of rice, rice-based products, other vegetables, fishes, mushrooms, and other foods, with a special focus on rice-arsenic interactions. The mechanisms of arsenic uptake, translocation and distribution in plants and grains are also explained. In closing, the book reviews a variety of prospective agronomic and biotechnological solutions to the problem of arsenic accumulation in rice grains. The book is intended for a broad audience including researchers, scientists, and readers with diverse backgrounds including agriculture, environmental science, food science, environmental management, and human health. It can also be used as an important reference guide for undergraduate and graduate students, university faculties, and environmentalists.
Author: Mogens Henze Publisher: IWA Publishing (International Water Assoc) ISBN: Category : Science Languages : en Pages : 170
Book Description
For information on the online course in Biological Wastewater Treatment from UNESCO-IHE, visit: http://www.iwapublishing.co.uk/books/biological-wastewater-treatment-online-course-principles-modeling-and-design Over the past twenty years, the knowledge and understanding of wastewater treatment have advanced extensively and moved away from empirically-based approaches to a first principles approach embracing chemistry, microbiology, physical and bioprocess engineering, and mathematics. Many of these advances have matured to the degree that they have been codified into mathematical models for simulation with computers. For a new generation of young scientists and engineers entering the wastewater treatment profession, the quantity, complexity and diversity of these new developments can be overwhelming, particularly in developing countries where access is not readily available to advanced level tertiary education courses in wastewater treatment. Biological Wastewater Treatment addresses this deficiency. It assembles and integrates the postgraduate course material of a dozen or so professors from research groups around the world that have made significant contributions to the advances in wastewater treatment. The book forms part of an internet-based curriculum in biological wastewater treatment which also includes: Summarized lecture handouts of the topics covered in book Filmed lectures by the author professors Tutorial exercises for students self-learning Upon completion of this curriculum the modern approach of modelling and simulation to wastewater treatment plant design and operation, be it activated sludge, biological nitrogen and phosphorus removal, secondary settling tanks or biofilm systems, can be embraced with deeper insight, advanced knowledge and greater confidence.
Author: National Research Council Publisher: National Academies Press ISBN: 0309076293 Category : Nature Languages : en Pages : 242
Book Description
Having safe drinking water is important to all Americans. The Environmental Protection Agency's decision in the summer of 2001 to delay implementing a new, more stringent standard for the maximum allowable level for arsenic in drinking water generated a great deal of criticism and controversy. Ultimately at issue were newer data on arsenic beyond those that had been examined in a 1999 National Research Council report. EPA asked the National Research Council for an evaluation of the new data available. The committee's analyses and conclusions are presented in Arsenic in Drinking Water: 2001 Update. New epidemiological studies are critically evaluated, as are new experimental data that provide information on how and at what level arsenic in drinking water can lead to cancer. The report's findings are consistent with those of the 1999 report that found high risks of cancer at the previous federal standard of 50 parts per billion. In fact, the new report concludes that men and women who consume water containing 3 parts per billion of arsenic daily have about a 1 in 1,000 increased risk of developing bladder or lung cancer during their lifetime.
Author: S. Somiya Publisher: Springer Science & Business Media ISBN: 9400907435 Category : Technology & Engineering Languages : en Pages : 503
Book Description
According to the late Professor Emeritus Seitaro Tsuboi,l the word 'hydrothermal' was used as early as 1849 by a British geologist, Sir Roderick Murchison (1792-187 I), in relation to the action of heated water in bringing about change in the earth's crust. The term abounds in later geological literature, and is most frequently met in connection with the processes that take place at a stage near the closing in the course of consolidation of magma. When a cooling magma reaches that stage, the residual liquid contains a large proportion of volatile components, chiefly water, and further cooling results in the formation of minerals of special interest or ore-deposits. A great concern of Tsuboi's as a petrologist was to elucidate the details of the nature of various actions involved in these 'hydrothermal processes', of which little was known. It is remarkable that, in the last few decades, extensive high-temperature and high-pressure experiments, in which water plays an important role, have become practicable in laboratories, owing to the development of new apparatus and new methods. As a result, the knowledge essential to the elucidation of 'hydrothermal processes' has been improved, but is still far from complete.
Author: Ramesh C Gupta Publisher: Elsevier ISBN: 0080481604 Category : Medical Languages : en Pages : 1233
Book Description
Veterinary Toxicology, 2nd edition is a unique single reference that teaches the basic principles of veterinary toxicology and builds upon these principles to offer an essential clinical resource for those practicing in the field. This reference book is thoroughly updated with new chapters and the latest coverage of topics that are essential to research veterinary toxicologists, students, professors, clinicians and environmentalists. Key areas include melamine and cyanuric acid, toxicogenomics, veterinary medical geology, toxic gases, toxicity and safety evaluation of new veterinary pharmaceuticals and much more. The 2nd edition of this popular book represents the collective wisdom of leading contributors worldwide and continues to fill an undeniable need in the literature relating to veterinary toxicology. - New chapters covering important and timely topics such as melamine and cyanuric acid, toxicogenomics, toxic gases and veterinary medical geology - Expanded look at international topics, such as epidemiology of animal poisonings, regulatory guidelines and poisonous plants in Europe - Heavily contributed book with chapters written by qualified and well-experienced authorities across all areas of veterinary toxicology - Problem solving strategies are offered for treatment as well as in-depth knowledge of the basic mechanisms of veterinary toxicology
Author: Dr Manuel Pi N. Miramontes
Author: Dr Manuel Pi N. Miramontes
Author: Agustín Montiel Cota
Author: 
Author: International Atomic Energy Agency
Author: Metcalf & Eddy, Inc., an AECOM Company
Author: Sudhakar Srivastava
Author: Mogens Henze
Author: National Research Council
Author: S. Somiya
Author: Ramesh C Gupta