Effects Of Activated Carbon Surface Chemistry And Pore Structure On The Adsorption Of Trace Organic Contaminants From Aqueous Solution
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Author |
: Lei Li |
Publisher |
: |
Total Pages |
: 159 |
Release |
: 2002 |
ISBN-10 |
: OCLC:50511464 |
ISBN-13 |
: |
Rating |
: 4/5 (64 Downloads) |
Synopsis Effects of Activated Carbon Surface Chemistry and Pore Structure on the Adsorption of Trace Organic Contaminants from Aqueous Solution by : Lei Li
Keywords: trace organic contaminants, pore structure, surface chemistry, adsorbent.
Author |
: Detlef R. U. Knappe |
Publisher |
: IWA Publishing |
Total Pages |
: 100 |
Release |
: 2004-01-01 |
ISBN-10 |
: 9781843398417 |
ISBN-13 |
: 1843398419 |
Rating |
: 4/5 (17 Downloads) |
Synopsis Effects of Activated Carbon Characteristics on Organic Contaminant Removal by : Detlef R. U. Knappe
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 |
: |
Publisher |
: |
Total Pages |
: |
Release |
: 2002 |
ISBN-10 |
: OCLC:656421493 |
ISBN-13 |
: |
Rating |
: 4/5 (93 Downloads) |
Synopsis Effects of Activated Carbon Surface Chemistry and Pore Structure on the Adsorption of Trace Organic Contaminants from Aqueous Solution by :
The principal objectives of this research were (1) to identify activated pore structure and surface chemistry characteristics that assure the effective removal of trace organic contaminants from aqueous solution, and (2) to develop a procedure to predict the adsorption capacity of activated carbons from fundamental adsorbent and adsorbate properties. To systematically evaluate pore structure and surface chemistry effects on the adsorption of organic micropollutants from aqueous solution, a matrix of activated carbon fibers (ACFs) with three activation levels and four surface chemistry levels was prepared and characterized. In addition, three commercially available granular activated carbons (GACs) were studied to verify whether correlations developed for the ACF matrix are valid for adsorbents that are typically used for water treatment. BET surface area, pore size distribution, elemental composition, point of zero charge and infrared spectroscopy data were obtained to characterize the adsorbents. The results showed that the ACF matrix prepared in this study permits a fairly independent evaluation of surface chemistry and pore structure effects on organic contaminant adsorption from aqueous solution. Methyl tertiary-butyl ether (MTBE), a relatively hydrophilic adsorbate, and trichloroethene (TCE), a relatively hydrophobic adsorbate, served as adsorbate probes. To evaluate the effects of natural organic matter (NOM) on MTBE and TCE adsorption capacities, isotherm experiments were conducted in ultrapure water and Sacramento-San Joaquin Delta water. With respect to surface chemistry, both single-solute isotherms and isotherms in the presence of NOM indicated that hydrophobic adsorbents more effectively removed TCE and MTBE from aqueous solution than hydrophilic adsorbents. Enhanced water adsorption on polar surface sites explained the poorer performance of the hydrophilic adsorbents. Based on the elemental composition of the low-ash carbons evaluated in this study, act.
Author |
: Robert W. Coughlin |
Publisher |
: |
Total Pages |
: 44 |
Release |
: 1970 |
ISBN-10 |
: UOM:39015002127531 |
ISBN-13 |
: |
Rating |
: 4/5 (31 Downloads) |
Synopsis Effect of Surface Groups on Adsorption of Pollutants by : Robert W. Coughlin
Author |
: |
Publisher |
: |
Total Pages |
: |
Release |
: 2001 |
ISBN-10 |
: OCLC:656418096 |
ISBN-13 |
: |
Rating |
: 4/5 (96 Downloads) |
Synopsis Effects of Activated Carbon Surface Chemistry and Pore Structure on the Absorption of Methyl Tertiary-Butyl Ether and Trichloroethene from Natural Water by :
Activated carbon adsorption is the best available treatment technology for thecontrol of many objectionable trace organic compounds. Activated carbons are frequentlycharacterized by the iodine number and BET surface area, but these parameters do notcorrelate well with trace organic compound removal from natural water. Therefore, theobjective of this research was to develop activated carbon selection criteria that assure theeffective removal of trace organic contaminants from natural water and to base theselection criteria on the adsorbent's pore structure and surface chemistry. Tosystematically evaluate pore structure and surface chemistry effects, a matrix of activatedcarbon fibers (ACFs) with three activation levels and four surface chemistry levels wasstudied. To evaluate whether adsorption trends established for ACFs were also valid forgranular activated carbon (GAC), ACF results were compared with those obtained forthree commercially available GACs. Adsorption capacities were determined for naturalorganic matter (NOM), for relatively hydrophilic methyl tertiary-butyl ether (MTBE) andrelatively hydrophobic trichloroethene (TCE) in organic-free water, and for MTBE andTCE in the presence of NOM. NOM isotherms showed that DOC adsorption occurredprimarily in pores with diameters in the 11 to 500 Å range and that electrostaticinteractions between NOM and the carbon surface played a role in NOM adsorption. According to both single-solute isotherms and micropollutant isotherms in the presence of NOM, hydrophobic adsorbents more effectively removed TCE and MTBE thanhydrophilic adsorbents. Effective adsorbents for drinking water treatment shouldtherefore contain little oxygen and nitrogen whose presence increases the polarity of theadsorbent surface. Based on the elemental composition of the low-ash carbons evaluatedin this study, activated carbons should have oxygen and nitrogen contents that sum to nomore than 2 to 3 mmol/g to assure sufficient hydrophobicity. In a.
Author |
: Teresa J. Bandosz |
Publisher |
: Elsevier |
Total Pages |
: 587 |
Release |
: 2006-02-27 |
ISBN-10 |
: 9780080455952 |
ISBN-13 |
: 0080455956 |
Rating |
: 4/5 (52 Downloads) |
Synopsis Activated Carbon Surfaces in Environmental Remediation by : Teresa J. Bandosz
Activated Carbon Surfaces in Environmental Remediation provides a comprehensive summary of the environmental applications of activated carbons. In order to understand the removal of contaminants and pollutants on activated carbons, the theoretical bases of adsorption phenomena are discussed. The effects of pore structure and surface chemistry are also addressed from both science and engineering perspectives. Each chapter provides examples of real applications with an emphasis on the role of the carbon surface in adsorption or reactive adsorption. The practical aspects addressed in this book cover the broad spectrum of applications from air and water cleaning and energy storage to warfare gas removal and biomedical applications. This book can serve as a handbook or reference book for graduate students, researchers and practitioners with an interest in filtration, water treatment, adsorbents and air cleaning, in addition to environmental policies and regulations. Addresses fundamental carbon science and how it relates to applications of carbon surfaces Describes the broad spectrum of activated carbon applications in environmental remediation Serves as a handbook or reference book for graduate students, researchers and practitioners in the field
Author |
: Roop Chand Bansal |
Publisher |
: CRC Press |
Total Pages |
: 498 |
Release |
: 2005-05-24 |
ISBN-10 |
: 9781420028812 |
ISBN-13 |
: 1420028812 |
Rating |
: 4/5 (12 Downloads) |
Synopsis Activated Carbon Adsorption by : Roop Chand Bansal
High surface area, a microporous structure, and a high degree of surface reactivity make activated carbons versatile adsorbents, particularly effective in the adsorption of organic and inorganic pollutants from aqueous solutions. Activated Carbon Adsorption introduces the parameters and mechanisms involved in the activated carbon adsorption
Author |
: James S. Mattson |
Publisher |
: |
Total Pages |
: 256 |
Release |
: 1971 |
ISBN-10 |
: STANFORD:36105031360196 |
ISBN-13 |
: |
Rating |
: 4/5 (96 Downloads) |
Synopsis Activated Carbon: Surface Chemistry and Adsorption from Solution by : James S. Mattson
Author |
: Detlef R. U. Knappe |
Publisher |
: American Water Works Association |
Total Pages |
: 136 |
Release |
: 2007 |
ISBN-10 |
: 9781583215425 |
ISBN-13 |
: 1583215425 |
Rating |
: 4/5 (25 Downloads) |
Synopsis Alternative Adsorbents for the Removal of Polar Organic Contaminants by : Detlef R. U. Knappe
This project studies the application of high-silica zeolites for the removal of polar organic contaminants, i.e., antimicrobial compounds and the fuel additive methyl tertiary-butyl ether (MTBE), from drinking water. Recently published data show that high-silica zeolites, a class of crystalline adsorbents with well defined pore sizes, exhibit considerably larger single-solute MTBE adsorption capacities than activated carbons and carbonaceous resins. The effectiveness of high-silica zeolites is compared to that of activated carbons and a carbonaceous resin.
Author |
: Tushar Kanti Sen |
Publisher |
: CRC Press |
Total Pages |
: 320 |
Release |
: 2017-10-20 |
ISBN-10 |
: 9781138196858 |
ISBN-13 |
: 1138196851 |
Rating |
: 4/5 (58 Downloads) |
Synopsis Air, Gas, and Water Pollution Control Using Industrial and Agricultural Solid Wastes Adsorbents by : Tushar Kanti Sen
Air and water pollution occurs when toxic pollutants of varying kinds (organic, inorganic, radioactive and so on) are directly or indirectly discharged into the environment without adequate treatment to remove these potential pollutants. There are a total of 13 book chapters in three sections contributed by significant number of expert authors around the world, aiming to provide scientific knowledge and up-to-date development of various solid wastes based cost-effective adsorbent materials and its sustainable application in the removal of contaminates/pollutants from air, gas and water. This book is useful for the professions, practicing engineers, scientists, researchers, academics and undergraduate and post-graduate students’ interest on this specific area. Key Features: • Exclusive compilation of information on use of industrial and agricultural waste based adsorbents for air and water pollution abatement. • Explores utilization of industrial solid wastes in adsorptive purification and agricultural and agricultural by-products in separation and purification. • Discusses cost-effective solid wastes based emerging adsorbents. • Alternative adsorbents in the removal of a wide range of contaminants and pollutants from water is proposed. • Includes performance of unit operations in waste effluents treatment.