Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Seasonal Changes Of Ndma Formation Potential And Its Removal During Water Treatment
Download Seasonal Changes Of Ndma Formation Potential And Its Removal During Water Treatment full books in PDF, epub, and Kindle. Read online Seasonal Changes Of Ndma Formation Potential And Its Removal During Water Treatment ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Seasonal Changes of NDMA Formation Potential and Its Removal During Water Treatment by : Habibullah Uzan
Download or read book Seasonal Changes of NDMA Formation Potential and Its Removal During Water Treatment written by Habibullah Uzan and published by . This book was released on 2016 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stability, Formation Potential and Removal of N-nitrosodimethylamine (NDMA) in Drinking Water by : Xiaoyan Qin
Download or read book Stability, Formation Potential and Removal of N-nitrosodimethylamine (NDMA) in Drinking Water written by Xiaoyan Qin and published by . This book was released on 2005 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: NDMA stability under various water treatment conditions were tested under both laboratory and field conditions. NDMA concentrations were determined in the laboratory by varying temperature, alkalinity, TOC, pH, free chlorine and monochloramine. The results indicated no NDMA degradation occurred while varying these parameters, except for monochloramine, where NDMA increased when treated with monochloramine. Field work included monitoring four utilities quarterly for a year. Seasonal variation and the stability of NDMA in the distribution systems were studied. Unfortunately, the NDMA formation level was low and no trend could be determined. The use of UV for the destruction of NDMA was evaluated. NDMA degradation by UV was a pseudo-first order reaction. NDMA was reduced from 100 ng/L to 10 ng/L with 1000 mJ/cm 2 UV dosage. The results confirmed that UV is a feasible technique for NDMA removal. pH did not have any significant effects. A total of sixty Missouri lake water samples were treated with 1 mM monochloramine for 2 days and 7 days to evaluate NDMA formation potential. NDMA was formed in almost all lake samples, the differences of the formation level and rate may indicate the existence of different NDMA precursors in these lakes. There was a positive correlation between NDMA formation and DOC concentration.
Book Synopsis Prevention of the Formation of N-nitrosodimethylamine (NDMA) During Wastewater Chlorination by : William Armistead Mitch
Download or read book Prevention of the Formation of N-nitrosodimethylamine (NDMA) During Wastewater Chlorination written by William Armistead Mitch and published by . This book was released on 2003 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Disinfection By-products in Drinking Water by : K. Clive Thompson
Download or read book Disinfection By-products in Drinking Water written by K. Clive Thompson and published by Royal Society of Chemistry. This book was released on 2016 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the latest developments in themes related to water disinfection by-products, this book brings the academic and industry researchers right up to date.
Book Synopsis Removal and Destruction of NDMA and NDMA Precursors During Wastewater Treatment by : David L. Sedlak
Download or read book Removal and Destruction of NDMA and NDMA Precursors During Wastewater Treatment written by David L. Sedlak and published by . This book was released on 2006 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of N-Nitrosodimethylamine (NDMA) Formation at Varied PH and Conditions in Treated Wastewater by : Chetna Vasudeva
Download or read book Evaluation of N-Nitrosodimethylamine (NDMA) Formation at Varied PH and Conditions in Treated Wastewater written by Chetna Vasudeva and published by . This book was released on 2018 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: N-nitrosodimethylamine is a carcinogenic disinfection byproduct which can be reformed after wastewater treatment if appropriate conditions are present. In this study various NDMA formation precursors over a range of conditions have been studied to attempt to quantify this NDMA reformation potential. Efforts were made in this study to demonstrate the effect of time, pH, and multiple different precursor chemicals on the reformation process. Dimethylamine (DMA) has been demonstrated to be a precursor chemical, and was chosen as a standard for initial experiments. The concentration of this precursor was kept constant at 100 ppt (parts per trillion) and solutions at three different pH’s were tested over a 24-hour time period to see if any significant NDMA formation occurred. The impacts of various treated wastewater constituent chemicals including H2O2, monochloramine, dimethylhydrazine, etc. were also performed in this study. Significant difficulties occurred for the analysis of these samples, with large background interferences occurring in the method of analysis. Based on the data obtained, it appears that the formation potential of NDMA with DMA as a precursor was found to be the most efficient compound at basic pH (pH 9) and very basic (pH 13). This is consistent with the last step in wastewater remediation, where quicklime is added to the water to regulate the pH and for protection of distribution system. In addition, preliminary experiments were conducted using Ranitidine as a NDMA reformation precursor.
Download or read book The Llobregat written by Sergi Sabater and published by Springer. This book was released on 2012-06-02 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Llobregat belongs to the most thoroughly studied rivers in Europe and is a paradigm of the confluence of human and natural disturbances in a single basin. Because of its location in a very densely populated region and its Mediterranean character, the Llobregat supports a mixture of irregular flow, water abstraction, excess nutrients, mining debris, and a wide array of pollutants. The aquatic organisms strive to survive in a dramatically changing river that passes through a succession of dams, weirs and channels. The long-term river monitoring as well as the research that has been carried out in the river for a long time have provided an extensive knowledge of these disturbances and their effects on the biological communities. This book highlights the available information, with emphasis on the hydrological, chemical and biological elements interspersed in the river. Experts in the field discuss the main nutrient patterns and pollutant occurrence and the responses of the biological quality elements as well as the river ecosystem to the overall natural and man-made influences.
Book Synopsis Effect of Preformed Chloramines and Chlorine to Ammonia Ratio on the Formation of N-nitrosodimethylamine (NDMA) in TRWD East Texas Raw Water Delivery System by : Khidir Hamad
Download or read book Effect of Preformed Chloramines and Chlorine to Ammonia Ratio on the Formation of N-nitrosodimethylamine (NDMA) in TRWD East Texas Raw Water Delivery System written by Khidir Hamad and published by . This book was released on 2015 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tarrant Regional Water District (TRWD) pumps untreated raw water from Richland Chambers and Cedar Creek reservoirs in East Texas to provide water to several customer cities including Arlington and Fort Worth. TRWD adds chloramines to the pipeline to combat biofilm growth, that reduces pipeline capacity and increases pumping costs, and to control zebra mussels, that clog intake structure screens and the pump wet wells. However, addition of chloramines leads to the formation of Nnitrosodimethylamine (NDMA), a potent carcinogen, by reaction of chloramines with nitrogenous organic precursors possibly present in the raw water. NDMA formation presents a challenge to TRWD because potential regulation of NDMA and other nitrosamines will force TRWD and other utilities alike to seek treatment options. Because post treatment removal of NDMA is ineffective and expensive, the best strategy is to optimize conditions to minimize NDMA formation and to eliminate nitrogenous NDMA precursors in the system. This research examines the effect of preformed chloramines and chlorine to ammonia mass ratio on NDMA formation in the District's current and future pipelines.
Book Synopsis Factors Affecting NDMA Formation During Drinking Water Treatment by : James Edward Graham
Download or read book Factors Affecting NDMA Formation During Drinking Water Treatment written by James Edward Graham and published by . This book was released on 1996 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water Reuse by : National Research Council
Download or read book Water Reuse written by National Research Council and published by National Academies Press. This book was released on 2012-07-17 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Expanding water reuse-the use of treated wastewater for beneficial purposes including irrigation, industrial uses, and drinking water augmentation-could significantly increase the nation's total available water resources. Water Reuse presents a portfolio of treatment options available to mitigate water quality issues in reclaimed water along with new analysis suggesting that the risk of exposure to certain microbial and chemical contaminants from drinking reclaimed water does not appear to be any higher than the risk experienced in at least some current drinking water treatment systems, and may be orders of magnitude lower. This report recommends adjustments to the federal regulatory framework that could enhance public health protection for both planned and unplanned (or de facto) reuse and increase public confidence in water reuse.
Download or read book Index Medicus written by and published by . This book was released on 2003 with total page 2084 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
Book Synopsis Advanced Oxidation Processes for Water Treatment by : Mihaela I. Stefan
Download or read book Advanced Oxidation Processes for Water Treatment written by Mihaela I. Stefan and published by IWA Publishing. This book was released on 2017-09-15 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Oxidation Processes (AOPs) rely on the efficient generation of reactive radical species and are increasingly attractive options for water remediation from a wide variety of organic micropollutants of human health and/or environmental concern. Advanced Oxidation Processes for Water Treatment covers the key advanced oxidation processes developed for chemical contaminant destruction in polluted water sources, some of which have been implemented successfully at water treatment plants around the world. The book is structured in two sections; the first part is dedicated to the most relevant AOPs, whereas the topics covered in the second section include the photochemistry of chemical contaminants in the aquatic environment, advanced water treatment for water reuse, implementation of advanced treatment processes for drinking water production at a state-of-the art water treatment plant in Europe, advanced treatment of municipal and industrial wastewater, and green technologies for water remediation. The advanced oxidation processes discussed in the book cover the following aspects: - Process principles including the most recent scientific findings and interpretation. - Classes of compounds suitable to AOP treatment and examples of reaction mechanisms. - Chemical and photochemical degradation kinetics and modelling. - Water quality impact on process performance and practical considerations on process parameter selection criteria. - Process limitations and byproduct formation and strategies to mitigate any potential adverse effects on the treated water quality. - AOP equipment design and economics considerations. - Research studies and outcomes. - Case studies relevant to process implementation to water treatment. - Commercial applications. - Future research needs. Advanced Oxidation Processes for Water Treatment presents the most recent scientific and technological achievements in process understanding and implementation, and addresses to anyone interested in water remediation, including water industry professionals, consulting engineers, regulators, academics, students. Editor: Mihaela I. Stefan - Trojan Technologies - Canada
Book Synopsis Contribution of Wastewater to DBP Formation by : Stuart W. Krasner
Download or read book Contribution of Wastewater to DBP Formation written by Stuart W. Krasner and published by American Water Works Association. This book was released on 2008 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to evaluate the formation, occurrence, control and fate and transport of DBPs and their precursors in treated wastewater, as well as their effects on downstream DWTPs. This report addressed the effect DBPs can have on managing drinking-water supplies impacted by treated wastewater.
Book Synopsis Chemistry of Ozone in Water and Wastewater Treatment by : Clemens von Sonntag
Download or read book Chemistry of Ozone in Water and Wastewater Treatment written by Clemens von Sonntag and published by IWA Publishing. This book was released on 2012-08-31 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Even though ozone has been applied for a long time for disinfection and oxidation in water treatment, there is lack of critical information related to transformation of organic compounds. This has become more important in recent years, because there is considerable concern about the formation of potentially harmful degradation products as well as oxidation products from the reaction with the matrix components. In recent years, a wealth of information on the products that are formed has accumulated, and substantial progress in understanding mechanistic details of ozone reactions in aqueous solution has been made. Based on the latter, this may allow us to predict the products of as yet not studied systems and assist in evaluating toxic potentials in case certain classes are known to show such effects. Keeping this in mind, Chemistry of Ozone in Water and Wastewater Treatment: From Basic Principles to Applications discusses mechanistic details of ozone reactions as much as they are known to date and applies them to the large body of studies on micropollutant degradation (such as pharmaceuticals and endocrine disruptors) that is already available. Extensively quoting the literature and updating the available compilation of ozone rate constants gives the reader a text at hand on which his research can be based. Moreover, those that are responsible for planning or operation of ozonation steps in drinking water and wastewater treatment plants will find salient information in a compact form that otherwise is quite disperse. A critical compilation of rate constants for the various classes of compounds is given in each chapter, including all the recent publications. This is a very useful source of information for researchers and practitioners who need kinetic information on emerging contaminants. Furthermore, each chapter contains a large selection of examples of reaction mechanisms for the transformation of micropollutants such as pharmaceuticals, pesticides, fuel additives, solvents, taste and odor compounds, cyanotoxins. Authors: Prof. Dr. Clemens von Sonntag, Max-Planck-Institut für Bioanorganische Chemie, Mülheim an der Ruhr, and Instrumentelle Analytische Chemie, Universität Duisburg-Essen, Essen, Germany and Prof. Dr. Urs von Gunten, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, and Ecole Polytechnique Federal de Lausanne, Lausanne, Switzerland.
Book Synopsis Organic Pollutants in the Water Cycle by : Thorsten Reemtsma
Download or read book Organic Pollutants in the Water Cycle written by Thorsten Reemtsma and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first in-depth and comprehensive reference on the most pertinent polar contaminant classes and their behavior in the whole water cycle includes, among others, industrial chemicals, consumer products, polar herbicides and pharmaceuticals. All chapters are uniformly structured, covering properties, pollution sources, occurrence in wastewater, surface water, and groundwater as well as water treatment aspects, while ecotoxicological and assessment aspects are also covered. Among the authors are leading experts in their relevant fields, many of whom provide here groundbreaking research results. The result is an up-to-date information source for researchers and professionals working in water quality monitoring, water supply, or wastewater treatment, as well as environmental and water chemists, geochemists, ecologists, chemists and engineers.
Download or read book EPA 815-R. written by and published by . This book was released on 1999 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long-Term Effects of Disinfection Changes on Water Quality by : John E. Dyksen
Download or read book Long-Term Effects of Disinfection Changes on Water Quality written by John E. Dyksen and published by American Water Works Association. This book was released on 2007 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to many U.S. water utilities that are considering changing disinfectants from chlorine to alternative disinfectants, this research has been undertaken to gain knowledge of long-term effects.
