Download or read book Rejection of Emerging Organic Contaminants by Nanofiltration and Reverse Osmosis Membranes written by Victor Augusto Yangali Quintanilla and published by CRC Press. This book was released on 2010-05-11 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pollution of water sources with emerging contaminants (micropollutants) is a fact known worldwide. Although the risks of micropollutants in sources of water are partly recognized, interpretation of consequences are controversial; thus, the future effects of altered water with micropollutants remains uncertain and may constitute a point of conc
Download or read book Transport and Removal Mechanisms of Trace Organic Pollutants by Nanofiltration and Reverse Osmosis Membranes written by Jinwen Wang and published by . This book was released on 2014 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective and focus of this study is to fully understand trace organic pollutant transport through NF/RO membranes. An extension of the classical solution-diffusion model had been developed that relates transport through NF/RO membranes directly to membrane structure descriptors (i.e., effective barrier layer pore size, porosity and thickness, etc.). In general, model predictions agreed well with experimental data suggesting the model captures the phenomenological behavior of commercial NF/RO membranes for separations relevant to modern water treatment objectives. The model also provides new mechanistic insights about the "effective structure" of NF/RO composite membranes and how trace organic solutes are rejected. These results suggest it is possible and important to fine-tune the surface energy of membrane and membrane structure (pore size, porosity, thickness) to achieve high membrane selectivity for certain solute. The effects of feed solution ionic strength, pH and divalent cation content on NF/RO membrane structure and performance were elucidated experimentally and fitted with the newly developed model. Generally, water permeabilities of all three membranes decreased with ionic strength and divalent cation content, but increased with pH. For RO membranes, neutral solute rejection decreased with pH and divalent cation content, but increased with ionic strength and the salt rejection remained independent with water chemistry except for very low pH of 3; for a NF membrane, solute rejection was more sensitive to water chemistry and neutral solute rejection decreased with ionic strength, pH, but increased with divalent cation content. Ultimately, these new insights may be useful in selection of already commercial or design of new NF/RO membranes for removal of chemicals of emerging concern in water treatment. Four different organic solute removals by six different commercial NF/RO membranes in laboratory re-created groundwater matrix were experimentally determined. SWRO membranes exhibited excellent removal efficiency (> 90%) for both NDMA and 1,4-dioxane in groundwater, while NF membranes showed inefficient separation. Correlation studies suggested that both size exclusion and thermodynamic partitioning play important roles in trace organics removal and a partition coefficient, which combines both steric effects and solute-membrane interactions, can be employed to predict organic solute rejection by NF/RO membranes.
Download or read book Trace Organic Removal by Nanofiltration and Reverse Osmosis Processes written by Long Nghiem and published by LAP Lambert Academic Publishing. This book was released on 2010-06 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph delineates the retention mechanisms of emerging trace organic contaminants by several nanofiltration (NF) and reverse osmosis membranes. Retention of neutral trace organics by a tight NF or RO membrane is dominated by steric (size) exclusion, whereas both electrostatic repulsion and steric exclusion govern the retention of negatively charged trace organics by a loose NF membrane. Speciation of trace organics may lead to a dramatic change in retention as a function of pH, with much greater retention observed for ionized, negatively charged trace organics. Retention of the negatively charged trace organics decreases as the solution's ionic strength increases due to charge shielding and double layer compression. For uncharged trace organic species, intrinsic physicochemical properties of the trace organic molecules can substantially affect their retention. This monograph also critically demonstrates the possible complexity of a real membrane filtration system where trace organic contaminants are of concern. Factors such as operating conditions and feed solution composition can influence the filtration of trace organics.
Download or read book Nanofiltration 2 Volume Set written by Andrea Iris Schäfer and published by John Wiley & Sons. This book was released on 2021-08-09 with total page 1267 pages. Available in PDF, EPUB and Kindle. Book excerpt: An updated guide to the growing field of nanofiltration including fundamental principles, important industrial applications as well as novel materials With contributions from an international panel of experts, the revised second edition of Nanofiltration contains a comprehensive overview of this growing field. The book covers the basic principles of nanofiltration including the design and characterizations of nanofiltration membranes. The expert contributors highlight the broad ranges of industrial applications including water treatment, food, pulp and paper, and textiles. The book explores photocatalytic nanofiltration reactors, organic solvent nanofiltration, as well as nanofiltration in metal and acid recovery. In addition, information on the most recent developments in the field are examined including nanofiltration retentate treatment and renewable energy-powered nanofiltration. The authors also consider the future of nanofiltration materials such as carbon- as well as polymer-based materials. This important book: Explores the fast growing field of the membrane process of nanofiltration Examines the rapidly expanding industrial sector's use of membranes for water purification Covers the most important industrial applications with a strong focus on water treatment Contains a section on new membrane materials, including carbon-based and polymer-based materials, as well as information on artificial ion and water channels as biomimetic membranes Written for scientists and engineers in the fields of chemistry, environment, food and materials, the second edition of Nanofiltration provides a comprehensive overview of the field, outlines the principles of the technology, explores the industrial applications, and discusses new materials.
Download or read book Nanofiltration Rejection of Contaminants of Emerging Concern from Municipal Water Resource Recovery Facility Secondary Effluents for Potable Reuse Applications written by Steven Michael Jones and published by . This book was released on 2016 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: As reuse of municipal water resource recovery facility (WRRF) effluent becomes vital to augment diminishing fresh drinking water resources, concern exists that conventional barriers may prove deficient and the upcycling of contaminants of emerging concern (CECs) could prove harmful to human health and aquatic species if more effective and robust treatment barriers are not in place. There are no federal Safe Drinking Water Act (SDWA) regulations in place specifically for direct potable reuse (DPR) of WRRF effluent. Out of necessity, some states are developing their own DPR reuse regulations. Currently, reverse osmosis (RO) is the default full advanced treatment (FAT) barrier for CEC control. However, the potential exists for tight thin-film composite (TFC) nanofiltration (NF) membranes to provide acceptable CEC rejection efficacies for less capital, operations and maintenance (O&M), energy, and waste generated. Recognizing the inherent complexity of CEC rejection by membranes, this research program was designed to elucidate the vital predictive variables influencing the rejection of 96 CECs found in municipal WRRF effluents. Each of the CECs was cataloged by their intended use and quantitative structure activity relationship (QSAR) properties, and measured in secondary effluent samples from WRRFs in Texas and Oklahoma. These secondary effluent samples were then processed in bench-scale, stirred, dead-end pressure cells with water treatment industry-specified TFC NF and RO membranes. A multi-level, multi-variable model was developed to predict the probable rejection coefficients of CECs with the studied NF membrane. The model was developed from variables selected for their association with known membrane rejection mechanisms, CEC-specific QSAR properties, and characteristics of the actual solute matrix. R statistics software version 3.1.3 was utilized for property collinearity analysis, outlier analysis, and regression modeling. The Pearson correlation method was utilized for selection of the most vital predictor variables for modeling. The resulting Quantitative Molecular Properties Model (QMPM) predicted the NF rejection CECs based on size, ionic charge, and hydrophobicity. Furthermore, the QMPM was verified against a CEC rejection dataset published by an independent study for a similar commercially available TFC NF membrane.
Download or read book Comparing Nanofiltration and Reverse Osmosis for Treating Recycled Water written by Jorg E. Drewes and published by International Water Assn. This book was released on 2008 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to explore whether n
Download or read book Current Developments in Biotechnology and Bioengineering written by Sunita Varjani and published by Elsevier. This book was released on 2020-02-18 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Developments in Biotechnology and Bioengineering: Emerging Organic Micropollutants summarizes the current knowledge of emerging organic micropollutants in wastewater and the possibilities of their removal/elimination. This book attempts a thorough and exhaustive discussion on ongoing research and future perspectives on advanced treatment methods and future directions to maintain and protect the environment through microbiological, nanotechnological, application of membrane technology, molecular biological and by policymaking means. In addition, the book includes the latest developments in biotechnology and bioengineering pertaining to various aspects in the field of emerging organic micropollutants, including their sources, health effects and environmental impacts. Includes testing methods for the analysis and characterization of emerging organic micropollutants in wastewater Discusses the environmental impact and health hazards of emerging organic micropollutants in wastewater Provides a useful guide to identify priority areas of research demand in the remediation/removal of emerging organic micropollutants
Download or read book Emerging Contaminants from Industrial and Municipal Waste written by Damià Barceló and published by Springer. This book was released on 2008-10-16 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on innovative treatment technologies for the elimination of emerging contaminants in wastewater and drinking water treatment processes. The book also discusses sources and occurrence of emerging contaminants in municipal and industrial waste, giving an overview of state-of-the-art analytical methods for their identification. Further important aspects covered include the acute and chronic effects and overall impact of emerging contaminants on the environment.
Download or read book Emerging Organic Contaminants and Human Health written by Damia Barcelo and published by Springer. This book was released on 2012-04-17 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides an overview of the occurrence and fate of emerging contaminants, discusses advanced chemical analysis methods, toxicological and ecotoxicological effects as well as human exposure. One focus is on pharmaceuticals, in particular antibiotics, and the problems associated with their increased use in hospitals. Other covered emerging contaminants occurring e.g. in food, water, air or soil include brominated flame retardants, polar pesticides, phthalates, phosphate esters, perfluorinated compounds, personal care products, musk fragrances, disinfection byproducts, illicit drugs, and nanomaterials. The chapters written by experts are a valuable source of information for a broad audience, such as analytical chemists, environmental chemists and engineers, toxicologists, ecotoxicologists and epidemiologists working already in this field as well as newcomers.
Download or read book Comprehensive Membrane Science and Engineering written by Enrico Drioli and published by Newnes. This book was released on 2010-07-09 with total page 1528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Membrane Science and Engineering, Four Volume Set covers all aspects of membrane science and technology - from basic phenomena to the most advanced applications and future perspectives. Modern membrane engineering is critical to the development of process-intensification strategies and to the stimulation of industrial growth. The work presents researchers and industrial managers with an indispensable tool toward achieving these aims. Covers membrane science theory and economics, as well as applications ranging from chemical purification and natural gas enrichment to potable water Includes contributions and case studies from internationally recognized experts and from up-and-coming researchers working in this multi-billion dollar field Takes a unique, multidisciplinary approach that stimulates research in hybrid technologies for current (and future) life-saving applications (artificial organs, drug delivery)
Download or read book Treatment of Micropollutants in Water and Wastewater written by Jurate Virkutyte and published by IWA Publishing. This book was released on 2010-08-14 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last few years there has been a growing concern over the increasing concentration of micropollutants originating from a great variety of sources including pharmaceutical, chemical engineering and personal care product industries in rivers, lakes, soil and groundwater. As most of the micropollutants are polar and persistent compounds, they are only partially or not at all removed from wastewater and thus can enter the environment posing a great risk to the biota. It is hypothesized that wastewater is one of the most important point sources for micropollutants. Treatment of Micropollutants in Water and Wastewater gives a comprehensive overview of modern analytical methods and will summarize novel single and hybrid methods to remove continuously emerging contaminants - micropollutants from the aqueous phase. New trends (e.g. sensor technology, nanotechnology and hybrid treatment technologies) are described in detail. The book is very timely because the new techniques are still in the development phase and have to be realized not only in the laboratory but also on a larger scale. The content of the book is divided into chapters that present current descriptive and analytical methods that are available to detect and measure micropollutants together with detailed information on various chemical, biological and physicochemical methods that have evolved over the last few decades. Treatment of Micropollutants in Water and Wastewater will also enable readers to make well informed choices through providing an understanding of why and how micropollutants must be removed from water sources, and what are the most appropriate and available techniques for providing a cost and technologically effective and sustainable solutions for reaching the goal of micropollutant-free water and wastewater. The book will be suitable for water and wastewater professionals as well for students and researchers in civil engineering, environmental engineering and process engineering fields.
Download or read book Contaminants of Emerging Concern in Water and Wastewater written by Arturo Hernandez-Maldonado and published by Butterworth-Heinemann. This book was released on 2019-10-19 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contaminants of Emerging Concern in Water and Wastewater: Advanced Treatment Processes presents the state-of-the-art in the design and use of adsorbents, membranes, and UV/oxidation processes, along with the challenges that will need to be addressed to close the gap between development and implementation in water/wastewater treatment applications. Chapters cover adsorbent and membrane design and performance, direct comparison of performance data between new (inorganic and metal organic nanoporous materials) and classic adsorbents and membranes, a list of advantages, disadvantages, and challenges related to performance limitations, regenerability, and upscaling. In addition, users will find sections on the identification of potential site and off-site applications that are listed according to adsorbent and membrane types, transformation of CECs in low- and/or medium-pressure UV irradiation processes used for disinfection, the oxidation of CECs by chlorine and ozone, and a comparison of advanced oxidation processes for the treatment of a variety of CECs in water and wastewater. Addresses the advantages/disadvantages of select technologies, including energy resource needs and waste management issues of reverse osmosis, amongst other issues Presents information on the advancements of technology within the realm of Engineered Treatments of CECs Focuses on the inherent science and technology of advanced treatment processes
Download or read book Emerging Water Pollutants Concerns and Remediation Technologies written by Shaukat Ali Mazari and published by Bentham Science Publishers. This book was released on 2022-09-05 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines a wide range of emerging sources of water pollution. It consists of thirteen chapters dedicated to the topic, giving readers comprehensive information about the types of contaminants involved and the solutions for their removal. The first five chapters present an analysis of the emerging water pollutants, their toxicities, and the legislations available to monitor and regulate their emissions. This introduction is followed by 3 chapters that cover risk assessment of emerging pollutants, their fate and life cycle assessment. The last section of the book goes through the details of remediation technologies for wastewater treatment. This reference is equally suitable for academia, industry professionals and students, presenting state-of-the-art learnings on emerging water pollutants and their remediation methods.
Download or read book International Seminar on Nuclear War and Planetary Emergencies written by Richard C. Ragaini and published by World Scientific. This book was released on 2012 with total page 615 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 44th Session of the International Seminars on Nuclear War and Planetary Emergencies held in Erice, Sicily. This seminar has again gathered, in 2011, over one hundred scientists in an interdisciplinary effort that has been going on for the last 31 years, to examine and analyze planetary problems which have been followed up, all year long, by the World Federation of Scientists'' Permanent Monitoring Panels. Sample Chapter(s). Science, Culture and the Planetary Emergencies (4,689 KB). Contents: Opening Session; Energy (Focus: Global Nuclear Energy Issues After Fukushima); Water & Pollution (Focus: Water Scarcity and Pollution); Energy & Pollution (Focus: Unconventional Natural Gas: Benefits and Risks); Climate (Focus: Cosmic Rays and Climatic Processes); Water & Pollution (Focus: Contaminants of Emerging Concern (CEC)); Energy (Focus: Energy Efficiency); Special Session: Lectio Magistralis; Information Security (Focus: The Role of Science in Information Technologies and Internet Tools in Developing Countries); Food, Soil & Medicine (Focus: Greenhouse Gases Consequences and Evidence-Based Third Millennium Medicine); WFS General Meeting (PMP Reports OCo Debate and Conclusions); Water & Pollution Workshop; Mitigation of Terrorist Acts Workshop; Seminar Participants. Readership: Scientists in all fields, universities and institutes in all fields of science OCo politicians and decision makers OCo ministries of science, interior and security, foreign affairs OCo international organisations.
Download or read book International Seminar On Nuclear War And Planetary Emergencies 44th Session The Role Of Science In The Third Millennium written by Richard C Ragaini and published by World Scientific. This book was released on 2012-06-29 with total page 615 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 44th Session of the International Seminars on Nuclear War and Planetary Emergencies held in Erice, Sicily. This seminar has again gathered, in 2011, over one hundred scientists in an interdisciplinary effort that has been going on for the last 31 years, to examine and analyze planetary problems which have been followed up, all year long, by the World Federation of Scientists' Permanent Monitoring Panels.
Download or read book Advanced Treatment Technologies for Urban Wastewater Reuse written by Despo Fatta-Kassinos and published by Springer. This book was released on 2016-01-28 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume offers a detailed overview of currently applied and tested wastewater treatment technologies and the integration of advanced processes to remove trace organic contaminants and microorganisms. It discusses the potential of enhanced biological treatment to produce effluent suitable for reuse, new processes for urban wastewater disinfection and the reduction of antibiotic resistant bacteria, as well as the effect of advanced oxidation processes on wastewater microbiome and chemical contaminants. It also presents membrane bioreactors, moving bed bioreactors, light and solar driven technologies, ozonation and immobilised heterogeneous photocatalysis and provides an evaluation of the potential of constructed wetlands integrated with advanced oxidation technologies to produce wastewater safe for reuse. Furthermore, the volume discusses water reuse issues and standards, the status of membrane bioreactors applications, and the treatment of reverse osmosis concentrate for enhanced water recovery during wastewater treatment. Finally, it presents recent developments in potable water reuse and addresses various important issues in this framework, like the proper protection of public health, reliability and monitoring. This volume is of interest to experts, scientists and practitioners from various fields of research, including analytical and environmental chemistry, toxicology and environmental and sanitary engineering, as well as treatment plant operators and policymakers.
Download or read book Membrane Processes written by Robert Rautenbach and published by John Wiley & Sons. This book was released on 1989 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental processes of mass transport in membranes are outlined in this book, which also develops the applications of these processes in industry. Local transport phenomena and the behaviour of individual elements, the technical unit and the module are all examined.
