Sorption Of Arsenic From Drinking Water To Mg Oh 2 Sorrel S Cements And Zirconium Doped Materials
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Sorption Of Arsenic From Drinking Water To Mg Oh 2 Sorrel S Cements And Zirconium Doped Materials
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Author :
language : en
Publisher:
Release Date : 2002
Sorption Of Arsenic From Drinking Water To Mg Oh 2 Sorrel S Cements And Zirconium Doped Materials written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
It was discovered that MgO or Mg(OH)2 when it reacts with water is a very strong sorbent for arsenic. Distribution constants, or K{sub d} values, are as high as 1 x 106 L/mole. In this work, Mg(OH)2 and other compounds have been investigated as sorbents for arsenic and other contaminants. This work has resulted in several major accomplishments including: (1) design, construction, and testing of a pressure sand filter to remove Mg(OH)2 after it has sorbed arsenic from water, (2) stabilization of Mg(OH)2 as a Sorrel's cement against reaction with carbonate that results in MgCO3 formation decreasing the efficiency of Mg(OH)2 to sorb arsenic, and (3) the development of a new, very promising sorbent for arsenic based on zirconium. Zirconium is an environmentally benign material found in many common products such as toothpaste. It is currently used in water treatment and is very inexpensive. In this work, zirconium has been bonded to activated carbon, zeolites, sand and montmorillonite. Because of its high charge in ionic form (+6), zirconium is a strong sorbent for many anions including arsenic. In equilibrium experiments arsenic concentrations in water were reduced from 200 ppb to less than 1 ppb in less than 1 minute of contact time. Additionally, analytical methods for detecting arsenic in water have also been investigated. Various analytical techniques including HPLC, AA and ICP-MS are used for quantification of arsenic. Due to large matrix interferences HPLC and AA techniques are not very selective and are time consuming. ICP-MS is highly efficient, requires a low sample volume and has a high tolerance for interferences. All these techniques are costly and require trained staff, and with the exception of ICP-MS, these methods cannot be used at low ppb arsenic concentration without using a pre-concentration step. An alternative to these traditional techniques is to use a colorimetric method based on leucocrystal violet dye interaction with iodine. This method has been adapted in our facility for quantifying arsenic concentrations down to 14 ppb.
Arsenic Removal From Contaminated Groundwater
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Author : Sirshendu De
language : en
Publisher: The Energy and Resources Institute (TERI)
Release Date : 2012-01-01
Arsenic Removal From Contaminated Groundwater written by Sirshendu De and has been published by The Energy and Resources Institute (TERI) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-01-01 with Technology & Engineering categories.
Contamination of groundwater with arsenic is being considered a pervasive and critical issue in recent years. Large areas in India, Bangladesh, South East Asia, and other parts of the world are suffering from this problem. Arsenic Removal from Contaminated Groundwater presents a comprehensive discussion on various important issues, including state-of-the-art arsenic removal technologies, preparation and performance analysis of laterite, and scale-up issues and design of a household filter. It also expounds the potentiality of raw laterite and treated laterite as low-cost arsenic adsorbents. The efficiency of adsorbent capacity is evaluated using real arsenic contaminated groundwater collected from an affected area in West Bengal, India. The topic is an emerging area and most of the work presented has the potential of field application.
Innovative Materials And Methods For Water Treatment
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Author : Marek Bryjak
language : en
Publisher: CRC Press
Release Date : 2016-02-17
Innovative Materials And Methods For Water Treatment written by Marek Bryjak and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-02-17 with Science categories.
Due to increasing demand for potable and irrigation water, water suppliers have to use alternative resources. They either have to regenerate wastewater or deal with contaminated surface water. This book brings together the experiences of various experts in preparing of innovative materials that are selective for arsenic and chromium removal, and in
Design Manual
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Author : Frederick Rubel
language : en
Publisher:
Release Date : 2003
Design Manual written by Frederick Rubel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Water categories.
Magnesia Cements
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Author : Mark Shand
language : en
Publisher: Newnes
Release Date : 2020-05-30
Magnesia Cements written by Mark Shand and has been published by Newnes this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-30 with Technology & Engineering categories.
There is an urgent need for innovative, cost-effective, and sustainable approaches to reduce the tremendous environmental impact of conventional cement and cement-based technologies. Consuming a significantly lower quantity of natural resources than conventional cements, with the added ability to effectively sequestering carbon, magnesia cements offer great potential in this area. Magnesia Cements: From Formulation to Application explores the latest developments in this exciting area, reviewing the unique properties offered by these cements, including superior strength, fire resistance, and exceptional ability to bond to a wide range of aggregates, and highlighting their potential role in making cement production and usage more sustainable. Providing detailed analysis of the chemistry, properties, manufacture, and both traditional and novel applications, Magnesia Cements: From Formulation to Application is ideally suited for materials scientists, cement chemists, ceramicists, and engineers involved with the design, development, application and impact assessment of magnesia cements across both academia and industry. Provides formulary information research into more environmentally friendly cement systems Discusses chemical phase analysis and the impact of formulation Applies analysis and history of global uses to provide support for future environmentally stable industrial, building, and non-building applications
Uses Of Industrial Minerals Rocks And Freshwater
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Author : Kaulir Kisor Chatterjee
language : en
Publisher:
Release Date : 2009
Uses Of Industrial Minerals Rocks And Freshwater written by Kaulir Kisor Chatterjee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Industrial minerals categories.
This book discusses the uses of minerals. Today over 3,000 minerals have been reported and named of which 1800-2000 have been studied and described fully. We are able to gainfully use only around 100 or so minerals. Of course, none of these 'usable' minerals can be consumed as such by the people. They can neither be eaten, nor worn, nor fought with. They have to be converted to various products that can be used by them for living their material lives. Through interactions amongst different minerals, innumerable materials are turned out for fulfilling our material needs. And though there are some uni-product minerals, the majority of the minerals are the ones each of which eventually yields a multiplicity of final consumable products. However, in today's fast developing world, there is always a multiple choice available for technologies and grades of input materials. So, technology and input materials can be chosen to suit any grade of a mineral that is available in nature. The only constraints are the market price and the cost of mining the mineral. The cost always has to be less than the market price, the vagaries of which limit the range of flexibility regarding the specifications of grade. But, even if these specifications are not flexible enough at some point of time, the principles underlying the specifications remain valid all the time. And those principles, rather than the specifications, are emphasised in this outstanding book.
Structure And Performance Of Cements Second Edition
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Author : P. Barnes
language : en
Publisher: CRC Press
Release Date : 2002-11-01
Structure And Performance Of Cements Second Edition written by P. Barnes and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-11-01 with Architecture categories.
Drawing together a multinational team of authors, this second edition of Structure and Performance of Cements highlights the latest global advances in the field of cement technology. Three broad categories are covered: basic materials and methods, cement extenders, and techniques of examination. Within these categories consideration has been given to environmental issues such as the use of waste materials in cement-burning as supplementary fuels and new and improved methods of instrumentation for examining structural aspects and performance of cements. This book also covers cement production, mineralogy and hydration, as well as the mechanical properties of cement, and the corrosion and durability of cementitious systems. Special cements are included, along with calcium aluminate and blended cements together with a consideration of the role of gypsum in cements. Structure and Performance of Cements is an invaluable key reference for academics, researchers and practitioners alike.
Chemically Bonded Phosphate Ceramics
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Author : Arun S. Wagh
language : en
Publisher: Elsevier
Release Date : 2016-05-17
Chemically Bonded Phosphate Ceramics written by Arun S. Wagh and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-05-17 with Technology & Engineering categories.
Chemically Bonded Phosphate Ceramics brings together the latest developments in chemically bonded phosphate ceramics (CBPCs), including several novel ceramics, from US Federal Laboratories such as Argonne, Oak Ridge, and Brookhaven National Laboratories, as well as Russian and Ukrainian nuclear institutes. Coupled with further advances in their use as biomaterials, these materials have found uses in diverse fields in recent years. Applications range from advanced structural materials to corrosion and fire protection coatings, oil-well cements, stabilization and encapsulation of hazardous and radioactive waste, nuclear radiation shielding materials, and products designed for safe storage of nuclear materials. Such developments call for a single source to cover their science and applications. This book is a unique and comprehensive source to fulfil that need. In the second edition, the author covers the latest developments in nuclear waste containment and introduces new products and applications in areas such as biomedical implants, cements and coatings used in oil-well and other petrochemical applications, and flame-retardant anti-corrosion coatings. Explores the key applications of CBPCs including nuclear waste storage, oil-well cements, anticorrosion coatings and biomedical implants Demystifies the chemistry, processes and production methods of CBPCs Draws on 40 years of developments and applications in the field, including the latest developments from USA, Europe, Ukraine, Russia, China and India
Radioactivity In The Environment
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Author : Laurie Wirt
language : en
Publisher:
Release Date : 1994
Radioactivity In The Environment written by Laurie Wirt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Little Colorado River (N.M. and Ariz. ) categories.
Lea S Chemistry Of Cement And Concrete
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Author : Peter Hewlett
language : en
Publisher: Elsevier
Release Date : 2003-11-12
Lea S Chemistry Of Cement And Concrete written by Peter Hewlett and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-11-12 with Technology & Engineering categories.
Lea's Chemistry of Cement and Concrete deals with the chemical and physical properties of cements and concretes and their relation to the practical problems that arise in manufacture and use. As such it is addressed not only to the chemist and those concerned with the science and technology of silicate materials, but also to those interested in the use of concrete in building and civil engineering construction. Much attention is given to the suitability of materials, to the conditions under which concrete can excel and those where it may deteriorate and to the precautionary or remedial measures that can be adopted. First published in 1935, this is the fourth edition and the first to appear since the death of Sir Frederick Lea, the original author. Over the life of the first three editions, this book has become the authority on its subject. The fourth edition is edited by Professor Peter C. Hewlett, Director of the British Board of Agrement and visiting Industrial Professor in the Department of Civil Engineering at the University of Dundee. Professor Hewlett has brought together a distinguished body of international contributors to produce an edition which is a worthy successor to the previous editions.