Download or read book The Removal of Humic Acid by Adsorption on Granular Activated Carbon written by John A. Schenne and published by . This book was released on 1977 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Humic Substances Removal by Activated Carbon written by Michael C.-Y. Lee and published by . This book was released on 1980 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Removal of Humic Acid on Activated Carbon written by Seyyedhassan Nekouinaini and published by . This book was released on 1980 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Activated Carbon Adsorption of Trace Organic Compounds written by Vernon L. Snoeyink and published by . This book was released on 1977 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Removal of Humic Substances from Water Using Solar Irradiation and Granular Activated Carbon Adsorption written by X. Liu and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: For the existing water treatment processes, difficulties in removing humic substances (HS) to improve drinking water quality, and safety, have created the demand for exploring novel options to enhance HS removal. Here a combination of solar irradiation and granular activated carbon (GAC) adsorption is proposed. It aims to make use of the most freely available and abundant energy source, sunlight, to improve the performance of GAC adsorption process. An investigation into how characteristics of HS vary under natural sunlight and how this influences the subsequent removal of HS by GAC adsorption was carried out. Bulk water parameters, and more specifically, UV absorbance at 254 nm (UV254), as well as dissolved organic carbon (DOC) were used in conjunction with molecular weight (MW) to evaluate the performance of the solar-GAC method. The observation was made that solar irradiation led to a decrease in DOC, UV254 and MW of HS. The high MW components were photodegraded into smaller molecules, even with very low solar intensity in winter. Significant photodegradation of small molecules was also achievable by exposure to natural sunlight alone. Pre-treatment using solar irradiation was shown to successfully improve the GAC adsorption performance on HS removal, increasing the DOC removal from 69 % to 95 %. An up to three-fold increase in the adsorption capacity of GAC for the irradiated HS was observed. Solar collectors were found to effectively enhance the photodegradation of HS, and consequently enhance the removal of HS by GAC adsorption. The application of solar collectors could be a viable option for humic water treatment. The proposed solar irradiation-GAC adsorption method provides a new approach for the treatment of humic rich waters. The utilization of solar irradiation in water treatment processes is considered a sustainable and promising field.
Download or read book Advances in Chemistry Series written by and published by . This book was released on 1983 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adsorption Treatment for the Removal of Humic Substances from Drinking Water Supply Using Granular Activated Carbon and Iron containing Adsorbents written by and published by . This book was released on 2006 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence and Removal of Organics in Drinking Water written by Joel Mallevialle and published by CRC Press. This book was released on 1992-06-23 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use this new book to solve water treatment problems related to toxicity, taste and odor, and bacteria regrowth. Influence and Removal of Organics in Drinking Water presents the latest advances in oxidation technologies, ozonation, membrane technology, micropollutant removal, and filtration processes. Fundamental aspects of coagulation, flocculation, adsorption, ozonation, preozonation, and granular activated carbon are discussed. Filtration methods covered include biological filtration, membrane filtration, and ultrafiltration. The book will provide a useful reference for water treatment plant managers and operators, water engineers, water supply managers, and consultants.
Download or read book Treatment of Water by Granular Activated Carbon written by Michael J. McGuire and published by . This book was released on 1983 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemicals as Intentional and Accidental Global Environmental Threats written by Elisabeta Chirila and published by Springer Science & Business Media. This book was released on 2007-01-15 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multidisciplinary book presents a critical assessment of our knowledge of chemical threats to environmental security, with special reference to prevention of chemical releases, rapid detection, risk assessment and effective management of emergency situations and long-term consequences of chemical releases. The technologies evaluated concern mainly prevention and management of both intentional and accident releases of chemicals into the environment. The book features contributors from a range of relevant scientific fields.
Download or read book Effects of Activated Carbon Characteristics on Organic Contaminant Removal written by Detlef R. U. Knappe and published by IWA Publishing. This book was released on 2004-01-01 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Activated Carbon Adsorption of Organics from the Aqueous Phase written by I. H. Suffet and published by . This book was released on 1980 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modelling the Unsteady State Residual Removal breakthrough Curve for Humic Acid on Activated Carbon written by Christopher Laryea Madden and published by . This book was released on 1996 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Activated Carbon for Water Treatment written by H. Sontheimer and published by American Water Works Association. This book was released on 1988 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Activated Carbon Adsorption of a Chloroform humic Acid System written by Gary Robert Mueller and published by . This book was released on 1981 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Competitive Adsorption Between Atrazine and Humic Acid Onto NYEX 1000 and Its Electrochemical Regeneration written by Kayvan Jambakhsh and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Activated carbon (AC) has been extensively used as an adsorbent for the removal of target contaminants from water. However, it has a number of limitations. First, through competition with background organic compounds the ACs capacity to remove the target compounds can be decreased by up 70%. This is attributed to competitive adsorption and pore blockage by the background organics. Second, AC have a finite adsorption capacity so granular activated carbon (GAC) in adsorbers needs to be periodically regenerated or replaced. Third, the conventional thermal GAC regeneration technique results in the loss of 10 to 12% of the carbon mass in each regeneration cycle. As a result, there has been significant lab-scale research on alternative GAC methods that avoid such a significant carbon mass loss. Unfortunately, they have not been as effective as thermal regeneration. NYEX® is a newly-developed graphitic intercalated compound adsorbent capable of removing different types of contaminants and which can be completely regenerated electrochemically without a loss of adsorbent mass. The objectives of this thesis are to determine, if like with activated carbon, the adsorption of trace target contaminants on NYEX® is impacted by the presence of background organic compounds, and to quantify the impact of competitive adsorption has on the electrochemical regeneration. Experiments were conducted using atrazine, as a model toxic target contaminant, and humic acid as a model background organic matter. Bottle-point batch isotherm tests of single solute solutions were performed using two different approaches. The constant adsorbate solution-varying adsorbent dose isotherms for humic acid yielded unreasonable data for the high equilibrium liquid phase concentrations data points, it is speculated this was caused by competition with compounds leaching from the adsorbent. The varying adsorbate solution concentration-constant adsorbent dose humic acid isotherms yielded reasonable results and was adopted for all the remaining experiments. The humic acid isotherm yielded Freundlich model coefficient values that were statistically the same as those of an earlier study. A NYEX® bi-solute (atrazine and humic) isotherm experiment showed that the humic acid decreased the atrazine adsorption capacity by an average of 37%, which is of the same order of magnitude one would expect for the same experiment using activated carbon. Given that NYEX® lacks the large network of internal pores of AC, pore blockage by the humic acid should not be significant yet there still was a significant decrease in the atrazine adsorption. The literature on activated carbon adsorption isotherms involving target contaminants and background organic matter generally does not report on the adsorption of humic acid within these experiments, however two studies indicate that the adsorption capacity of the background acids in only slightly impacted by the competition. So, it was surprising that the bi-solute loading of NYEX® yielded 98% lower humic adsorption capacities. The dominance of atrazine in the competitive adsorption tests is attributed to its higher molar concentration in the test solutions and the higher diffusivity of atrazine. Batch regeneration tests were performed using a reactor with similar construction to the reactor used by Brown et al. (2004a). Electrochemical regeneration yielded regeneration efficiencies of up to 170% indicating the NYEX® 1000 was improved by the electrochemical processing. Hydrogen ions could have bonded to the NYEX® and improved the adsorption capacity of atrazine, which is a weak base, and decreased the adsorption capacity of humic acid. Multiple regeneration cycles of the atrazine-humic acid loaded NYEX® 1000 and atrazine-only loaded NYEX® 1000 were performed, they showed that the presence of the humic acids did not decrease the long-term atrazine adsorption capacities. Thus, the long-term atrazine adsorption on NYEX® followed by the NYEX® electrochemical regeneration is not impacted by the presence of humic acid, i.e., the improvements in the NYEX® compensate for the competitive adsorption decrease in adsorption capacity. This phenomenon should be investigated further in future research.
Download or read book Performance of Granular Activated Carbon for Removal of Humic and Fulvic Acids written by John Gregory Slesinski and published by . This book was released on 1984 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
