Competitive Adsorption On Activated Carbon From Bi Solute Systems Of Selected Organic Contaminants Found In Drinking Waters In Low Concentrations PDF Download
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Author | : Carl W. Baxter |
Publisher | : |
Total Pages | : 192 |
Release | : 1979 |
Genre | : Carbon, Activated |
ISBN | : |
Download Competitive Adsorption on Activated Carbon from Bi-solute Systems of Selected Organic Contaminants Found in Drinking Waters in Low Concentrations Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 64 |
Release | : 1979 |
Genre | : Drinking water |
ISBN | : |
Download Removal of Organic Contaminants from Drinking Water Using Techniques Other Than Granular Activated Carbon Alone Book in PDF, ePub and Kindle
Author | : Detlef R. U. Knappe |
Publisher | : IWA Publishing |
Total Pages | : 100 |
Release | : 2004-01-01 |
Genre | : Science |
ISBN | : 1843398419 |
Download Effects of Activated Carbon Characteristics on Organic Contaminant Removal Book in PDF, ePub and Kindle
Many water treatment plants need to remove objectionable trace organic compounds, and activated carbon adsorption is often the best available technology. Utilities face the challenge of having to choose from a large variety of activated carbons, and iodine number or BET surface area values are often utilized in the selection process. Although neither parameter correlates well with adsorption capacities, alternative activated carbon selection criteria based on fundamental adsorbent and adsorbate properties are lacking to date. The first objective of this research was to systematically evaluate the effects of activated carbon pore structure and surface chemistry on the adsorption of two common drinking water contaminants: the relatively polar fuel oxygenate methyl tertiary-butyl ether (MTBE) and the relatively nonpolar solvent trichloroethene (TCE). The second objective was to develop simple descriptors of activated carbon characteristics that facilitate the selection of suitable adsorbents for the removal of organic contaminants from drinking water.Originally published by AwwaRF for its subscribers in 2003 This publication can also be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below
Author | : Zaid K. Chowdhury |
Publisher | : American Water Works Association |
Total Pages | : 353 |
Release | : 2013 |
Genre | : Technology & Engineering |
ISBN | : 1583219072 |
Download Activated Carbon Book in PDF, ePub and Kindle
"Many books have been written about granular activated carbon. Some focus on the theory of performance and removal mechanisms while others focus on design features. This book focuses on solutions. It describes the challenges facing water providers to provide safe water that is acceptable to their customers, utility experiences using activated carbon, activated carbon applications, and design and procurement approaches. The appendices include detailed case studies and a life-cycle assessment demonstrating favorable sustainability considerations for activated carbon when compared to other treatment technologies. Never before has all of this information been together in one location. The what, why, and how of activated carbon are connected in this book and demonstrate why this treatment technology has maintained its status as an integral treatment technology in the quest for pure water over millennia"--
Author | : Vernon L. Snoeyink |
Publisher | : |
Total Pages | : 136 |
Release | : 1977 |
Genre | : Carbon, Activated |
ISBN | : |
Download Activated Carbon Adsorption of Trace Organic Compounds Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 916 |
Release | : 1984 |
Genre | : Drinking water |
ISBN | : |
Download Adsorption Techniques in Drinking Water Treatment Book in PDF, ePub and Kindle
Author | : Thomas Lester Yohe |
Publisher | : |
Total Pages | : 612 |
Release | : 1982 |
Genre | : Carbon, Activated |
ISBN | : |
Download Specific Organic Removals and the Significance of Competitive Adsorption in Granular Activated Carbon Treatment of Drinking Waters Book in PDF, ePub and Kindle
Author | : Samuel D. Faust |
Publisher | : Elsevier |
Total Pages | : 522 |
Release | : 2013-10-22 |
Genre | : Technology & Engineering |
ISBN | : 148316263X |
Download Adsorption Processes for Water Treatment Book in PDF, ePub and Kindle
Adsorption Processes for Water Treatment discusses the application of adsorption in water purification. The book is comprised of 10 chapters that detail the carbon and resin adsorptive processes for potable water treatment. The text first covers the elements of surface chemistry and then proceeds to discussing adsorption models. Chapter 3 tackles the kinetics of adsorption, while Chapter 4 deals with batch systems and fixed fluid beds. Next, the book talks about the physical and chemical properties of carbon. The next two chapters discuss the adsorption of organic compounds and the removal of inorganic compounds, respectively. The eighth chapter presents operational, pilot plant, and case studies. Chapter 9 discusses the biological activated carbon treatment of drinking water, and Chapter 10 covers the adsorption of macroreticular resins. The book will be of great use to both researchers and professionals involved in the research and development of water treatment process.
Author | : Pardeep Singh |
Publisher | : John Wiley & Sons |
Total Pages | : 320 |
Release | : 2021-10-13 |
Genre | : Technology & Engineering |
ISBN | : 1119737613 |
Download Biosorption for Wastewater Contaminants Book in PDF, ePub and Kindle
Pollution due to various anthropogenic activities continues to increase. In terms of water pollutants, organic and inorganic pollutants are the most problematic. Although several measures have been proposed and implemented to prevent or reduce contamination, their increased concentration in water bodies has created serious concerns. Over the years, the problem has been aggravated by industrialization, urbanization and the exploitation of natural resources. The direct discharge of wastewater contaminants and their geographical mobilization have caused an increase in concentration in ground, surface, fluvial and residual waters. Extensive information about detection and disposal methods is needed in order to develop technological solutions for a variety of environments, both urban and rural. This book provides up-to-date information on wastewater contaminants, aimed at researchers, engineers and technologists working in this field. Conventional physicochemical techniques used to remove contaminants from wastewater include ion exchange, precipitation, degradation, coagulation, coating, membrane processes and adsorption. However, these applications have technological and economic limitations, and involve the release of large amounts of chemical reagents and by-products that are themselves difficult to remove. Biosorption - the use of organically generated material as an adsorbent – is attracting new research and scholarship. Thermally-treated calcined biomaterials may be treated to remove heavy metals from wastewater. To ensure the elimination of these contaminants, existing solutions must be integrated with intelligent biosorption functions. Biosorption for Wastewater Contaminants will find an appreciative audience among academics and postgraduates working in the fields of environmental biotechnology, environmental engineering, wastewater treatment technology and environmental chemistry.
Author | : Li Ding |
Publisher | : |
Total Pages | : |
Release | : 2010 |
Genre | : |
ISBN | : |
Download Mechanisms of Competitive Adsorption Between Trace Organic Contaminants and Natural Organic Matter on Activated Carbon Book in PDF, ePub and Kindle
Activated carbon adsorption is widely used in water treatment for removal of various organic micropollutants; nonetheless, the presence of natural organic matter (NOM) in source water can reduce its efficiency for micropollutant removal. NOM has been shown to compete with target contaminant via different mechanisms: direct competition for available adsorption sites which reduces equilibrium capacity for target compounds, blocking of pore entrance which reduces diffusion rate of the target compounds, and covering of surface sites which may actually enhances diffusion rate of the target compounds. The objective of this dissertation study was to further elucidate the individual competitive effects, to investigate how pore sizes of adsorbents and molecular structure of competing compounds affect competition and to gain a comprehensive understanding of the competitive adsorption. Atrazine, a widely used herbicide in the United States, was used as the trace-level target contaminant and NOM from different source waters as well as NOM surrogates were used as the competing compounds. Powdered activated carbons (PACs) with different pore size distribution (PSD) were used. The PSD was found to have great influence on the pore blockage (PB) effect caused by NOM. The equilibrium capacity of the NOM used in this study was best correlated to the amount of pores of diameter 15-50 ©5, which was also inversely related to the magnitude of the pore blockage effect. Activated carbon that has more surface area in this pore size range had a smaller PB effect on atrazine adsorption kinetics at the same NOM loading. This finding indicated that mesopores are important in realizing adsorption capacity for trace compounds by alleviating the adverse PB effect. The site covering effect was confirmed with additional types of PACs and various competing compounds. More important, the correlation equation that describes the enhanced surface diffusion coefficient for atrazine as a function of the loading of the site-covering compounds was found to be independent of either the PAC type or the competing compound type. The key component was to quantify the competing compound as the equivalent background compound (EBC), which reflected the extent of active sites being covered. iii The site competing effect, the site covering effect and the pore blocking effect were evaluated for five NOM surrogates with different sizes. The smaller molecules were generally more effective in reducing the equilibrium capacity of the target compound. However, for molecules of similar molecular weight, elongated molecules tended to have more equilibrium effect than round molecules. From a kinetic perspective, the enhancement in diffusivity was within one order of magnitude for all five surrogates, while the extent of the PB effect was greatly relying on molecular size that large-sized surrogates caused a much stronger PB effect. Therefore, the overall kinetic effect was dependent on molecular size and the PB effect was usually dominant except for very small molecules. Consistent with the enhanced kinetics associated with pre-adsorbed site-covering competing compounds, atrazine preloading was found to also increase the diffusion coefficient of atrazine, and the extent of enhancement caused by atrazine was greater than that caused by competing compounds. Several explanations were proposed for the difference, which include the micropore filling hypothesis and the artifact associated with the EBC method that was used for site-covering loading quantification.