Charcoal Regeneration - Part 2. Modified Carbon Surface Activity and Reversibility of TNT Adsorption PDF Download

Author: J. Haberman
Publisher:
ISBN:
Category :
Languages : en
Pages : 65

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Book Description
The TNT adsorption/solvent desorption cycling of activated carbon (FS300) has been studied as a function of various pretreatments. The preferential plugging of pores by the pretreatments did not enhance the regenerative property of the FS300. In conjunction with water adsorption/ desorption isotherms, the characteristics of a carbon with an improved cycling property has been elucidated. The improved property is due to a shift to larger pore volume and a larger ratio of pore opening to pore body diameters. Chemical regeneration of an activated carbon containing irreversible adsorbed TNT has been shown to be unfeasible.

Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 252

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Author: Jerome Haberman
Publisher:
ISBN:
Category :
Languages : en
Pages : 33

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Trinitrotoluene (TNT) and cyclotrimethylenetrinitramine (RDX), pink water, adsorption/solvent desorption cycling of activated carbon (FS300) has been studied as a function of various pretreatments. In agreement with previous studies of TNT and RDX individually, preferential plugging of pores by pretreatments did not improve the solvent regeneration of the FS300. The study of the competitive adsorption of TNT and RDX indicated that, at the higher concentrations, TNT tended to displace RDX from the carbon surface. This is attributed to a lower binding energy of the adsorbed RDX to the surface. In conjunction with water adsorption/desorption isotherms, the characteristics of a carbon with improved cycling properties have been elucidated. These properties are in agreement with those characteristics found in previous studies and involve a shift to a larger pore volume, increased concentration of pores in the mesopore range and an increased ratio of pore opening to pore body diameters. Another desirable property would be a lower adsorption binding energy for these explosives to the activated carbon.

Author: Thomas C. Castorina
Publisher:
ISBN:
Category :
Languages : en
Pages : 55

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Book Description
The interaction of TNT with the surface of activated carbon (FS300) has been studied via adsorption isotherms of TNT and water, surface area determinations and electron spectroscopy for chemical analysis (ESCA). The rate and extent of adsorption of TNT is strongly dependent on the particle size of FS300 and hence on the diffusion rate, and independent of pH and temperature. The process of deactivation of the carbon surface is shown to involve progressive irreversible occlusion of the microporous structure with each successive adsorption/desorption (with acetone) cycle. The irreversibility of TNT adsorption is attributed to chemical interaction and a mechanism for the deactivation of the carbon surface is postulated.

Author:
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ISBN:
Category : Science
Languages : en
Pages : 108

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Category : Aeronautics
Languages : en
Pages : 1368

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ISBN:
Category : Research
Languages : en
Pages : 938

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Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

Author:
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Category : Pollution
Languages : en
Pages : 834

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Author: Mei Zhang
Publisher: Springer
ISBN: 3319228617
Category : Technology & Engineering
Languages : en
Pages : 576

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Book Description
This book covers a wide range of topics relating to carbon nanomaterials, from synthesis and functionalization to applications in advanced biomedical devices and systems. As they possess unique and attractive chemical, physical, optical, and even magnetic properties for various applications, considerable effort has been made to employ carbon nanomaterials (e.g., fullerenes, carbon nanotubes, graphene, nanodiamond) as new materials for the development of novel biomedical tools, such as diagnostic sensors, imaging agents, and drug/gene delivery systems for both diagnostics and clinical treatment. Tremendous progress has been made and the scattered literature continues to grow rapidly. With chapters by world-renowned experts providing an overview of the state of the science as well as an understanding of the challenges that lie ahead, Carbon Nanomaterials for Biomedical Applications is essential reading not only for experienced scientists and engineers in biomedical and nanomaterials areas, but also for graduate students and advanced undergraduates in materials science and engineering, chemistry, and biology.

Author: Ruquan Ye
Publisher:
ISBN: 9789814877275
Category : Graphene
Languages : en
Pages : 88

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Book Description
LIG is a revolutionary technique that uses a common CO2 infrared laser scriber, like the one used in any machine shop, for the direct conversion of polymers into porous graphene under ambient conditions. This technique combines the preparation and patterning of 3D graphene in a single step, without the use of wet chemicals. The ease in the structural engineering and excellent mechanical properties of the 3D graphene obtained have made LIG a versatile technique for applications across many fields. This book compiles cutting-edge research on LIG by different research groups all over the world. It discusses the strategies that have been developed to synthesize and engineer graphene, including controlling its properties such as porosity, composition, and surface characteristics. The authors are pioneers in the discovery and development of LIG and the book will appeal to anyone involved in nanotechnology, chemistry, environmental sciences, and device development, especially those with an interest in the synthesis and applications of graphene-based materials.