Download PDF by Roop Chand Bansal: Activated Carbon Adsorption

By Roop Chand Bansal

ISBN-10: 0824753445

ISBN-13: 9780824753443

Excessive floor zone, a microporous constitution, and a excessive measure of floor reactivity make activated carbons flexible adsorbents, really powerful within the adsorption of natural and inorganic pollution from aqueous solutions. Activated Carbon Adsorption introduces the parameters and mechanisms concerned with the activated carbon adsorption of natural and inorganic compounds. this article brings jointly the main major learn on floor constitution and tactics, adsorption theories and isotherm equations, and functions from the newest literature on carbon adsorption.

The ebook in actual fact explains the surface-related interactions of activated carbons, their energetics, and the applicability of adsorption isotherm equations and their deviation from adsorption information. It then explores a number of purposes in quite a lot of parts, comparable to nuclear know-how, vacuum expertise, foodstuff expertise, prescribed drugs and drugs, gasoline garage, oil refining, and environmental remediation. Topics include: oils and fats, molecular sieves, refining of liquid fuels, insecticides, dyes, medications, and pollutants. 3 chapters are devoted to environmental functions, together with the adsorption of halogenated natural compounds and the removing of harmful gases and vapors, organo-sulphur compounds, and different inorganic compounds from wastewater and groundwater.

Activated Carbon Adsorption offers a whole survey of the starting to be variety of state of the art functions supported by means of a compilation of the most recent views in learn relating carbon surfaces and their adsorption methods from aqueous recommendations. Its unified method promotes additional learn in the direction of bettering and constructing more recent activated carbon adsorbents and tactics for the effective elimination of pollution from consuming water and commercial effluents.

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In general, it has been observed that these surface groups are thermally stable at temperatures below 200°C, independent of the temperature at which they are formed. The technique generally involves heating the carbon sample in vacuum or in an inert flowing carrier gas at a programmed heating rate. The oxygen-containing surface groups decompose into volatile gaseous products, which are then analyzed by conventional methods such as gravimetry, mass spectroscopy, gas chromatography, and IR spectroscopy.

However, the standard conditions under which comparable results can be obtained have been realized during the last few decades. It is now recognized that the base neutralization capacity of a carbon should be determined after degassing the sample at ~150°C so as to free it from any physically adsorbed gases and vapors. 2 N alkali solution for 24 to 72 hr. The contact time can be reduced to a few hours if the carbon and the alkali solution are heated under reflux. These conditions are now being followed by many of the investigators.

Examination of carbon surface structures. 9. fm Page 25 Saturday, April 16, 2005 4:50 PM Activated Carbon and Its Surface Structure 25 Infrared Spectroscopy Infrared spectroscopy (IR) in its various forms is an important and forceful tool that can provide useful information about surface functional groups on carbons. Special IR studies can also provide information regarding the molecular forces involved in the adsorption processes. Carbon is black in color and so has a tendency to absorb most of the radiation, at least in the visible region.

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Activated Carbon Adsorption by Roop Chand Bansal

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