Download or read book Competitive Adsorption of a Priority Pollutant Onto GAC written by Michelle Dianne Pregent and published by . This book was released on 1991 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Granular Activated Carbon Performance Capability and Availability written by J. Carl Uhrmacher and published by . This book was released on 1983 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Army currently uses granular activated carbon (GAC) at Army Ammunition Plants (AAPs) to remove nitrobodies from pink water prior to discharge. The AAPs operate at low production rates and are meeting established effluent limits. However, production rates may increase drastically at full mobilization and future effluent limits may be more strict. In response to Army needs, an information search/survey was performed to determine operating characteristics of GAC columns for reduction of effluent nitrobody concentrations from pink water. Data were obtained and reported on GAC pollutant removal capacity; competitive adsorption, feasibility to achieve stringent effluent limitations; research required to fill information gaps; and commercial GAC availability. (Author).

Download or read book Fundamentals of Adsorption written by M. Douglas LeVan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Adsorption is the proceedings of the fifth International Conference on the Fundamentals of Adsorption, which was held on May 13-18, 1995 at the Asilomar Conference Center, Pacific Grove, California. This conference was organized completely under the auspices of the International Adsorption Society. It was attended by 196 participants from 24 countries. Members of the Scientific Advisory Board, together with the Conference Committee, selected papers for presentation from a large number of proposals involving an especially high level of international participation. The fundamental aspects of adsorption is a subject which has grown rapidly in recent years, drawing researchers from many disciplines including materials science, chemistry, physics, biochemistry and biotechnology, and chemical, civil, mechanical and environmental engineering. Fundamentals of Adsorption serves as an excellent reference and may be used as a primary text for a graduate level course on adsorption research or as a secondary text for a course on any of the disciplines mentioned above.

Download or read book Competitive Adsorption on Activated Carbon from Bi solute Systems of Selected Organic Contaminants Found in Drinking Waters in Low Concentrations written by Carl W. Baxter and published by . This book was released on 1979 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aqueous Phase Adsorption of Priority Pollutants Onto Polymeric Resins written by Thomas Edward Browne and published by . This book was released on 1993 with total page 1182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adsorption of Organic Pollutants Onto Natural Adsorbents written by Arun Subramani and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this research, the adsorptive capacities of kenaf, peat moss, hay, and peanut hulls were evaluated for the removal of TNT and 2,4-DCP from aqueous solutions. Adsorbent loading capacities determined by batch studies were verified by continuous column experiments. It was found that the adsorption capacity of the candidate adsorbents were significantly lower than granular activated carbon (GAC). The impact of surface modification techniques, such as surface oxidation, were evaluated to study the effect on adsorption capacity. At lower equilibrium concentrations of the adsorbate (less than 10 ppb), surface oxidation by ozone showed an increase in the adsorption capacity. The same trend was not observed with peroxone and ultrasound pretreatment. The adsorbent requirement for treating water contaminated with TNT and 2,4-DCP were calculated based on the adsorptive capacity of the adsorbents. Though the adsorbent requirements for the candidate adsorbents were considerably higher than granular activated carbon, the adsorbent requirement costs for most of the candidate adsorbents tested were competitive when compared to GAC costs.

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1988 with total page 1226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanisms of Competitive Adsorption Between Trace Organic Contaminants and Natural Organic Matter on Activated Carbon written by Li Ding and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book International Seminar on Coal Science Technology written by and published by Allied Publishers. This book was released on 2005 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adsorption of Priority Pollutants at the Solid liquidinterface written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Significance and Treatment of Volatile Organic Compounds in Water Supplies written by Neil M. Ram and published by CRC Press. This book was released on 1990-02-26 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Significance and Treatment of Volatile Organic Compounds in Water Supplies reviews EPA-approved analytical methods for VOC analysis, QA/QC, data quality objectives and limits of detection. It covers current methods for the assessment of health effects, including toxicity and carcinogenicity. If you only purchase one book on VOCs-this should be it. Leading authorities present the latest essential information on VOCs in drinking water. This book will be a valuable resource to personnel involved with VOC contamination, treatment, costs, and regulation.

Download or read book Chemistry of Water Treatment written by Samuel D. Faust and published by CRC Press. This book was released on 2018-05-04 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition demonstrates how chemistry influences the design of water treatment plants and how it should influence the design. Historically, water treatment plants have been designed from hydraulic considerations with little regard to chemical aspects. The many chemical reactions used for removal of pollutants from water simply cannot be forced to occur within current designs. This book re-examines this traditional approach in light of today's water quality and treatment. Will current water treatment processes be sufficient to meet future demands or will new processes have to be devised? Chemistry of Water Treatment assesses the chemical and physical efficacies of current processes to meet the demands of the Safe Drinking water Act, providing expert information to persons responsible for the production of potable water into the next century.

Download or read book Applied Science Technology Index written by and published by . This book was released on 1995 with total page 1804 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Journal of the Water Pollution Control Federation written by and published by . This book was released on 1991 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Activated Carbon for Water and Wastewater Treatment written by Ferhan Cecen and published by John Wiley & Sons. This book was released on 2011-09-19 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph provides comprehensive coverage of technologies which integrate adsorption and biological processes in water and wastewater treatment. The authors provide both an introduction to the topic as well as a detailed discussion of theoretical and practical considerations. After a review of the basics involved in the chemistry, biology and technology of integrated adsorption and biological removal, they discuss the setup of pilot- and full-scale treatment facilities, covering powdered as well as granular activated carbon. They elucidate the factors that influence the successful operation of integrated systems. Their discussion on integrated systems expands from the effects of environmental to the removal of various pollutants, to regeneration of activated carbon, and to the analysis of such systems in mathematical terms. The authors conclude with a look at future needs for research and develoment. A truly valuable resource for environmental engineers, environmental and water chemists, as well as professionals working in water and wastewater treatment.

Download or read book Index Medicus written by and published by . This book was released on 2004 with total page 1930 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.

Download or read book Report Water Resources Research Institute written by Clemson University. Water Resources Research Institute and published by . This book was released on 1983 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt: