Water purification

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  • Economic development, population growth, and environmental pollution evolving in many parts of the world are placing great demands on existing resources of fresh water and reflecting a "water crisis". Resource management, efficient utilization of the water resources, and above all water purification are all alternatives to resolve the water crisis. Purification approaches include traditional approaches that have lasted for several centuries without major modifications as well as new innovative approaches....

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  • In order to maintain economic development and minimize future regional and international conflicts, the United States will need sustainable supplies of high-quality fresh water. Solutions to local water scarcity issues will likely require a combination of approaches, including demand management, improved water storage capacity, water quality protection, and advancements in supply-enhancing water treatment technologies. Desalination technologies can create new sources of freshwater from otherwise impaired waters such as seawater or brackish water.

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  • This book is a result of contributions of experts from international scientific community working in different aspects of nanocomposite science and applications and reports on the state of the art research and development findings on nanocomposites through original and innovative research studies.

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  • In recent years, the awareness of water needs and processing requirement has become an increasingly important topic. As the earth's population increases the demand for "clean" water has become an even larger factor in residential as well as industrial and commercial costs. There are now almost no natural water sources that do not require some purific

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  • For more than 30 years there has been remarkable growth in the need for quality water purification by all categories of users – municipal, industrial, institutional, medical, commercial and residential. The increasingly broad range of requirements for water quality has motivated the water treatment industry to refine existing techniques, combine methods and explore new water purification technologies.

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  • This volume covers the technologies that are applied to the treatment and purification of water. Those who are generally familiar with this field will immediately embrace the subject as a treatise on solid-liquid separations. However, the subject is much broader, in that the technologies discussed are not just restricted to pollution control hardware that rely only upon physical methods of treating and purifymg wastewaters.

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  • Tham khảo sách 'nanocomposites new trends and developments_1', kỹ thuật - công nghệ, hoá học - dầu khí phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • The soil ecosystem provides services such as carbon sequestration, nutrient cycling, water purification, provisioning of industrial and pharmaceutical goods, and a mitigating sink for chemical and biological agents. However, the soil is subject to various degradation processes. Its relation with the hydrosphere, biosphere, and atmosphere makes the interacting processes even more complex. Moreover, as the soilhuman interactions increase, threats, leading to a series of impacts on soil health, become more important....

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  • The environmental challenges we face today include all of the same ones that we faced more than 30 years ago at the first Earth Day celebration in 1970. In spite of the unflagging efforts of environmental professionals (and others), environmental problems remain. Many large metropolitan areas continue to be plagued by smog, beaches are periodically polluted by oil spills, and many running waters (rivers and streams) still suffer the effects of poorly treated sewage and industrial discharges....

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  • 7 Biological Effects of Synthetic Surfactants and Participation of Hydrobionts in Water Purification Experience indicates the negative impacts of surfactants and surfactant-containing preparations on representatives of the major functional ecosystemic blocks, including both autotrophic and heterotrophic organisms (see above). The author realizes that interpretation of the results obtained requires great caution and there are many factors that can affect the manifestation of biological effects of synthetic surfactants in more complex systems.

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  • Of late, the coastal ecosystems are highly degraded due to high population and industrial growth (Glasby & Roonwal, 1995; UNEP, 1997). Due to various pollutions including pesticide poisoning (Sen Gupta et al., 1990), over exploitation of water resources by power plant industries and the municipal uses and encroachment for urban developments force the fishing community to the brink of disappearance. When those natural resources are imperilled, so too are the livelihoods of the many people who live and work there.

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  • Đầu mùa xuân đã tuyết và băng-coveredhigh đồng cỏ núi cao, chu kỳ nước vẫn tiếp tục. Thành phần chính của chu kỳ, nước, đã-được tổ chức trong dự trữ, nghĩa đen đông lạnh cho những tháng mùa đông, uống với mùa xuân, mặt trời là cao, trực tiếp hơn, và trong thời gian dài, và các cơ quan đông lạnh của nước bắt đầu tan chảy. Làm cho tuyết tan này Way của nó xuống núi, tạo thành hồ.

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  • Biodiversity is fundamental to sustaining life, providing critical ecosystem services such as food provisioning, water purification, flood and drought control, nutrient cycling, and climate regulation, amongst many others. These services are essential to support human well-being and economic growth. Yet despite the significant economic, social and cultural values of biodiversity and ecosystem services, biodiversity worldwide is being lost, and in some areas at an accelerating rate.

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  • In Mozambique, Pathfinder is going beyond traditional maternal and child health to ensure the survival of children into adulthood. In addition to their traditional role distributing family planning information and products, CHWs have begun distributing water-purification solution and insecticide-treated bed nets for malaria prevention to pregnant women and mothers of children under five. They are promoting exclusive breast-feeding to the age of six-months, iron and folate supplements for pregnant women, growth monitoring, deworming, and proper nutrition.

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  • In 2007, the Tianjin Binhai New Area (TBNA) and one of its administrative zones—the Tianjin Economic-Technological Development Area (TEDA)—in northeast China asked the RAND Corporation to perform a technology-foresight study to help them develop and implement a strategic vision and plan for economic growth through technological innovation. This book describes the results of that study.

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  • In this paper, we compare coagulation ability of electrochemically activated aluminium colloid, PAC and aluminum sulphate in water purification of Red and Tolich rivers. The examined results shown that activated aluminium colloid is better coagulatant than PAC and aluminium sulfate in releasing Red river turbidity and Tolich river organic pollutants.

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  • Electrokinetics is a subject that has been at the core of numerous fundamental advancements in the field of colloid science for over a century. Electrokinetics is a self-contained body of science that has led to spectacular applications in separations, characterization of surface properties, manipulation of colloidal materials, and facilitation of fluid transport in microchannels. For instance, electrophoresis is one of the common techniques for separation of biological macromolecules (such as proteins).

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  • The program SORWACO takes both the transport and sorption related nonequilibrium into account. It calculates the concentration of the pollutant in each cell at every time step. The concentration in the water flowing out of the last cell is the concentration of the water that enters the purification or discharge system. It is possible to calculate the impact of intermittent groundwater recovery on both the decrease of the concentration during the recovery and the increase when the recovery is stopped. The groundwater flow is assumed to be steady.

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