Impact And Management Of Iron Corrosion By Products On Drinking Water Quality In Distribution Systems
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Impact And Management Of Iron Corrosion By Products On Drinking Water Quality In Distribution Systems
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Author : Md. Safiur Rahman
language : en
Publisher:
Release Date : 2014
Impact And Management Of Iron Corrosion By Products On Drinking Water Quality In Distribution Systems written by Md. Safiur Rahman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
ABSTRACT Cont.'d : Molecular weight (MW) distributions of DBPs precursor (DOM) revealed that the higher molecular weight fractions adsorbed preferentially onto goethite followed by magnetite surface. The change of MW distribution of DOM was found to be in reasonable agreement with the change of DBPs formation in iron-water systems.
Effect Of High Chloride Concentrations On Cast Iron Corrosion And Water Quality In Drinking Water Distribution Systems
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Author : Masoumeh Sharafimasooleh
language : en
Publisher:
Release Date : 2016
Effect Of High Chloride Concentrations On Cast Iron Corrosion And Water Quality In Drinking Water Distribution Systems written by Masoumeh Sharafimasooleh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Chloride can be present in drinking water from various sources including treatment practices for natural organic matter (NOM) removal, saltwater intrusion, run-off from deicing salt, and use of desalinated water. The purpose of this research was to examine the impacts of variable chloride concentrations on disinfection efficacy and microbial regrowth, iron corrosion and its release from iron surfaces, and effectiveness of different corrosion control strategies in chlorinated drinking water distribution systems. Additionally, the characteristics of resulting iron corrosion products and bacterial biofilm communities were investigated. Results showed that elevated chloride concentrations did not have a significant impact on microbial regrowth in terms of bulk or biofilm HPCs, and higher chlorine dosages were required to achieve target free chlorine residuals in high chloride systems. It was observed that in the presence of high chloride concentrations more crystalline and porous scales, which are less protective against corrosion, were formed on the surface of cast iron coupons that promoted the iron corrosion and release. Moreover, larger iron particles were formed, which can resuspend in flowing water and cause water discoloration. Investigations into the effect of variable chloride concentrations on effectiveness of different corrosion control strategies suggested that elevated chloride concentrations interfered with inhibiting action of the corrosion control strategies and reduced their effectiveness. Finally, results showed that bacterial biofilm population decreased with chlorination and increasing chloride concentrations, and were unlikely to contribute to the observed increased corrosion rates in cast iron systems under the conditions tested in this experiment.
Effects Of Water Quality Changes On The Corrosion Of Iron Accumulation And Release Of Inorganic Contaminants In Drinking Water Distribution Systems
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Author : Ching-Yu Peng
language : en
Publisher:
Release Date : 2012
Effects Of Water Quality Changes On The Corrosion Of Iron Accumulation And Release Of Inorganic Contaminants In Drinking Water Distribution Systems written by Ching-Yu Peng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Drinking water categories.
Corrosion and accumulation/release of trace inorganic contaminants in corrosion scales and sediments found in drinking water distribution systems (DWDSs) has gained considerable attention over the past several years. Many trace inorganic contaminants (e.g., lead, arsenic, nickel, vanadium and uranium) can accumulate on the surface of or be occluded within corrosion scales formed in DWDSs. However, little data are available on the actual concentrations of these contaminants beyond system entry-points. The accumulation of trace inorganic contaminants in DWDS solids can have consequences for the health of exposed populations if these contaminants are released from the scales thus resulting in their high levels at consumers' tap. This research ascertained the occurrence of inorganic contaminants in real drinking water systems. Corrosion scales and deposits from twenty drinking water utilities in the United States were characterized to determine the elemental, structural composition and the levels of inorganic contaminants in them. The modes of binding and mobility of these elements in the solids were also studied via sequential extractions. Effects of varying water quality conditions, including blending of desalinated water with surface water, NOM, and varying levels of anions (chloride and sulfate) on corrosion and accumulation/release of trace inorganic contaminants were thoroughly examined. Among the trace inorganic contaminants found in the scales, barium had the highest concentrations, followed by, in the decreasing order, lead, nickel, vanadium, arsenic, chromium, uranium, cadmium, antimony, selenium, and thallium. Speciation via sequential extractions demonstrated that arsenic, chromium and vanadium are the most stable elements, while nickel and manganese are much more mobile than all the other inorganic contaminants examined in this study. NOM had a more pronounced effect on corrosion, metal release and retention of inorganic contaminants than the blending ratio or anions.
Internal Corrosion Of Water Distribution Systems 2 Edition
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Author : American Water Works Association
language : en
Publisher: American Water Works Association
Release Date : 1996
Internal Corrosion Of Water Distribution Systems 2 Edition written by American Water Works Association and has been published by American Water Works Association this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Science categories.
This comprehensive reference for engineers, consultants, and public administration officials is recognized as the most complete, practical guide to water pipe corrosion, its health effects, and how to control it.
Drinking Water Distribution Systems
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2007-01-22
Drinking Water Distribution Systems written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-01-22 with Science categories.
Protecting and maintaining water distributions systems is crucial to ensuring high quality drinking water. Distribution systems-consisting of pipes, pumps, valves, storage tanks, reservoirs, meters, fittings, and other hydraulic appurtenances-carry drinking water from a centralized treatment plant or well supplies to consumers' taps. Spanning almost 1 million miles in the United States, distribution systems represent the vast majority of physical infrastructure for water supplies, and thus constitute the primary management challenge from both an operational and public health standpoint. Recent data on waterborne disease outbreaks suggest that distribution systems remain a source of contamination that has yet to be fully addressed. This report evaluates approaches for risk characterization and recent data, and it identifies a variety of strategies that could be considered to reduce the risks posed by water-quality deteriorating events in distribution systems. Particular attention is given to backflow events via cross connections, the potential for contamination of the distribution system during construction and repair activities, maintenance of storage facilities, and the role of premise plumbing in public health risk. The report also identifies advances in detection, monitoring and modeling, analytical methods, and research and development opportunities that will enable the water supply industry to further reduce risks associated with drinking water distribution systems.
Corrosion Of Iron And Copper In Potable Water Distribution Systems
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Author : Stein W. Østerhus
language : en
Publisher:
Release Date : 1997
Corrosion Of Iron And Copper In Potable Water Distribution Systems written by Stein W. Østerhus and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Internal Corrosion Control In Water Distribution Systems M58
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Author : AWWA Staff
language : en
Publisher: American Water Works Association
Release Date : 2011-01-12
Internal Corrosion Control In Water Distribution Systems M58 written by AWWA Staff and has been published by American Water Works Association this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-01-12 with Corrosion and anti-corrosives categories.
Internal Corrosion Control Of Water Supply Systems
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Author : Colin Hayes
language : en
Publisher: IWA Publishing
Release Date : 2012-08-31
Internal Corrosion Control Of Water Supply Systems written by Colin Hayes and has been published by IWA Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-08-31 with Science categories.
Part of Metals and Related Substances in Drinking Water Set - buy all five books together to save over 30%! This Code of Practice is concerned with metal pick-up by drinking water within the water supply chain, particularly from water mains and from domestic and institutional pipe-work systems. The principal metals of interest are copper, iron, and lead, and to a lesser extent nickel and zinc. The emphasis is on cold drinking water at its point of use by consumers. Metals arising from water sources and hot water systems are not considered. The intention is that this Code of Practice establishes an international standard for the control of internal corrosion of water supply systems. It provides a basis for identifying both problems and sustainable solutions in a manner which is sound scientifically and will help operators to achieve due diligence. It provides a template for improving internal corrosion control in countries, cities or towns where this has been neglected or poorly implemented. Internal Corrosion Control of Water Supply Systems is deliberately brief in its presentation of a wide array of complex information, in order to provide direction to practitioners that can be more easily related to their specific circumstances. The book also provides a series of check-lists and criteria to be used in risk assessment. Editor: Dr Colin R Hayes, University of Swansea, UK, Chair of IWA Specialist Group on Metals and Related Substances in Drinking Water.
Corrosion Prevention And Control In Water Treatment And Supply Systems
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Author : J.E. Singley
language : en
Publisher: William Andrew
Release Date : 1985-12-31
Corrosion Prevention And Control In Water Treatment And Supply Systems written by J.E. Singley and has been published by William Andrew this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985-12-31 with Science categories.
A guide to preventing and monitoring corrosion within municipal water systems. Includes case histories and reviews of monitoring, detection, prevention, and control techniques.
Optimizing Corrosion Control In Water Distribution Systems
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Author : Steven J. Duranceau
language : en
Publisher: American Water Works Association
Release Date : 2004
Optimizing Corrosion Control In Water Distribution Systems written by Steven J. Duranceau and has been published by American Water Works Association this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Electrochemical analysis categories.
This research studied the use of multi-element sensors based on electrochemical techniques for optimizing information related to corrosion control in water distribution systems. Such on-line sensor methods could provide an affordable and reliable tool for daily monitoring and mitigate some of the costs associated with following the mandates of the EPA's corrosion control for potable water.