The Effects of Surface Chemistry and PH on the Aqueous Phase Adsorption of Aniline on Activated Carbon PDF Download

Author: Kevin W. Jay
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: James S. Mattson
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 256

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Author: Robert W. Coughlin
Publisher:
ISBN:
Category : Adsorption
Languages : en
Pages : 44

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Author: Detlef R. U. Knappe
Publisher: IWA Publishing
ISBN: 1843398419
Category : Science
Languages : en
Pages : 100

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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: Ljubisa R. Radovic
Publisher: CRC Press
ISBN: 1482270129
Category : Science
Languages : en
Pages : 438

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"Provides an overview of scientific and technological issues in environmental applications of carbon materials. Emphasizes the versatility of carbon materials in both gas- and liquid-phase environmental applications, including a discussion of emerging technologies. Highlights the power and potential opportunities afforded by NMR spectroscopy for un

Author: Lei Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 159

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Keywords: trace organic contaminants, pore structure, surface chemistry, adsorbent.

Author: Zaheer Shaikh
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659127151
Category :
Languages : en
Pages : 136

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The important factors involved in the adsorption of aromatic compounds from aqueous solution by activated carbon, surface chemistry and porosity, were examined in this thesis. This was achieved by systematically investigating the adsorption of benzene, aniline, toluene, nitrobenzene and fluorobenzene by a granular activated carbon and various virgin and surface modified activated carbon fibers. The adsorption of water molecules (water vapor isotherms), the synthetic organic compound (SOC) itself (SOC vapor isotherms), and the SOC in water (i.e. SOC aqueous phase isotherms) on activated carbons were studied side by side.

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Category :
Languages : en
Pages :

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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: Roop Chand Bansal
Publisher: CRC Press
ISBN: 1420028812
Category : Science
Languages : en
Pages : 498

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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: I. H. Suffet
Publisher:
ISBN:
Category : Adsorption
Languages : en
Pages : 532

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