Synthesis and Characterization of Activated Carbon for Removal of Pb PDF Download

Author: Daniel Kibami
Publisher:
ISBN: 9783659892677
Category :
Languages : en
Pages : 100

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Author: Virginia Hernández Montoya
Publisher: BoD – Books on Demand
ISBN: 9535101978
Category : Science
Languages : en
Pages : 104

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Book Description
The present book discusses the principal lignocellulosic precursors used in the elaboration of activated carbons in different countries such as Asia, America, Europe and Africa; the different methods and experimental conditions employed in the synthesis of activated carbons, including one analysis of the principal stages of the preparation such as carbonization and activation (i.e., chemical or physical activation). Also, the recent and more specialized techniques used in the characterization of activated carbons are discussed in this book. For example, the techniques employed to determine textural parameters (mercury porosimetry and gas adsorption isotherms at 77 K) and different spectroscopies to determine chemical functionality (Raman, FT-IR, etc.) and other X-Ray techniques. Additionally, an overview of the application of activated carbons obtained from lignocellulosic precursors for wastewater treatment. Specifically, the analysis and discussion are focused on the advantages and capabilities of activated carbons for the removal of relevant toxic compounds and pollutants from water such as heavy metals, dyes, phenol, etc. Finally, the use of pyrolysis method for the valorization of two Mexican typical agricultural wastes (orange peel and pecan nut shell) for energy and carbon production is considered in this book.

Author: Christian Lincoln Mangun
Publisher:
ISBN:
Category :
Languages : en
Pages : 314

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One of the undesirable features of the modern day world is widespread contamination associated with the release of a large number of chemicals into the environment. In recent years there has been a tremendous amount of work done to quantify the harmful effect of these trace contaminants. Society's growing concern has led many governments to establish stricter standards for clean air and water, many of them in the ppb range. This necessitates the development of greatly improved methods for controlling the release of toxic contaminants and on designing new materials tailored to selectively remove a wide range of contaminants and permit for recovery and reuse. One technology which is extremely attractive for this purpose is the use of dry adsorbents such as activated carbons. Activated carbons have been used for many years for both air and water purification through a physical adsorption process in the micropores. Activated carbon granules (ACG's) have been the industry standard for many years. They are used as adsorbents to purify polluted waste streams because of their low cost and because they have been determined to be the best available technology for removal of many contaminants. However, the ACG's suffer from a number of drawbacks including poor selectivity, slow kinetics, the need for expensive containment systems, less than 100% working capacity, and costly reactivation. Perhaps the most serious problem is the absence of a comprehensive understanding as to the effect of pore size and chemistry on the adsorption properties. Such knowledge would allow one to tailor activated carbons for control of specific contaminants. There is a definite need for the development of improved materials designed specifically for a wide range of environmental problems.

Author: Manoj Kumar Arcot Arun
Publisher:
ISBN:
Category : Copper
Languages : en
Pages : 112

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Author: Kerry J. Howe
Publisher: John Wiley & Sons
ISBN: 0470405384
Category : Technology & Engineering
Languages : en
Pages : 674

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Book Description
Principles of Water Treatment has been developed from the best selling reference work Water Treatment, 3rd edition by the same author team. It maintains the same quality writing, illustrations, and worked examples as the larger book, but in a smaller format which focuses on the treatment processes and not on the design of the facilities.

Author: Vivekanand Gaur
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages :

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Author: Harry Marsh
Publisher: Elsevier
ISBN: 0080455964
Category : Science
Languages : en
Pages : 555

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Recent years have seen an expansion in speciality uses of activated carbons including medicine, filtration, and the purification of liquids and gaseous media. Much of current research and information surrounding the nature and use of activated carbon is scattered throughout various literature, which has created the need for an up-to-date comprehensive and integrated review reference. In this book, special attention is paid to porosities in all forms of carbon, and to the modern-day materials which use activated carbons - including fibres, clothes, felts and monoliths. In addition, the use of activated carbon in its granular and powder forms to facilitate usage in liquid and gaseous media is explored. Activated Carbon will make essential reading for Material Scientists, Chemists and Engineers in academia and industry. Characterization of porosity The surface chemistry of the carbons Methods of activation and mechanisms of adsorptio Computer modelling of structure and porosity within carbons Modern instrumental analytical methods

Author: Nicholas P. Cheremisinoff
Publisher: Prentice Hall
ISBN:
Category : Nature
Languages : en
Pages : 250

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Deals with the treatment of liquids, gas phase adsorption, air pollution control, treatment of hazardous wastes, carbon regeneration, controls, and safety.

Author: Bouaik Hassan
Publisher:
ISBN:
Category :
Languages : en
Pages : 22

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This article discusses the preparation and characterization of activated carbon by the combined method (combination of two methods of chemical activation by ZnCl 2 and physical CO 2 ) leads to essentially microporous coals with specific BET specific surfaces which can exceed 800 m 2 /g. It is generally obtained by the BET method which is based on the adsorption capacity (in vapor phase) of nitrogen at 77 K and the steric hindrance of the N2 molecule. Microporous activated carbon prepared from Moroccan red macroalgae can be used as excellent carriers for adsorbing small molecules like heavy metals and other organic molecules like pesticides. This work was devoted to the characterization of active carbon prepared from red macroalgae with H 3 PO 4 , ZnCl 2 , CO 2 , H 3 PO 4 / CO 2 , ZnCl 2 / by TFIR, BET and SEM.

Author: Mason Hsu
Publisher: Nova Science Publishers
ISBN: 9781536123494
Category : Science
Languages : en
Pages : 254

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Book Description
Activated carbons have been found a large variety of applications in several fields, such as chromatography, medicine, gas storage and environmental protection, among others. Most of these applications requires tailored physical-chemistry properties, regarding purity, particles shape, mechanical resistance, homogeneity, surface composition, specific surface area and porosity. Because of their especial properties, activated carbons have attracted increasing attention for several years. As supports and catalysts, they have been used in several reactions both in gas and liquid phases, such as hydrogenation/dehydrogenation, oxidation/reduction, decomposition of hydrocarbons, halogenation and methanation, among others. This book reviews the applications, preparation, properties synthesis, and uses of activated carbon.