The Mechanism Of Adsorption Of Dicyanoaurate On Activated Carbon
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Activated Carbon Adsorption
| Author | : Roop Chand Bansal |
| Publisher | : CRC Press |
| Total Pages | : 498 |
| Release | : 2005-05-24 |
| Genre | : Science |
| ISBN | : 1420028812 |
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
The Mechanism of Adsorption of Aurocyanide Onto Activated Carbon. 1. Relation Between the Effects of Oxygen and Ionic Strength
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 1990 |
| Genre | : |
| ISBN | : |
The poor agreement between different workers regarding the exact mechanism involved in the adsorption of aurocyanide onto activated carbon is shown to be due to differences in the experimental conditions they employed. The effects of oxygen and ionic strength are shown to be interrelated. Adsorption under conditions of high ionic strength, as found in gold plants, involves an ion-pair mechanism whereas, under conditions of low ionic strength, a portion of the gold is adsorbed by electrostatic interaction with ion-exchange sites formed through oxidation of the carbon surface by molecular oxygen.
The Mechanism of Adsorption of Au(CN)4(-) Onto Activated Carbon
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 1992 |
| Genre | : |
| ISBN | : |
The Au(CN)4(-) species adsorbs onto activated carbon as a chemically unchanged ion pair of the type M(n+)[Au(CN)4(-)]n, in a manner similar to that postulated for Au(CN)2(-). The affinity of carbon for Au(CN)4(-) is greater than that for Au(CN)2(-). A Mossbauer spectroscopic investigation has confirmed that Au(CN)4(-) is the species adsorbed from both acidic and neutral solutions. The Mossbauer spectrum of carbon that is loaded with Au(CN)4(-) and subsequently boiled in hydrochloric acid is interpreted in terms of the presence of Au(CN)2Cl2(-), Au(CN)2(-) and AuCN as products of the decomposition of Au(CN)4(-).
Adsorption by Carbons
| Author | : Eduardo J. Bottani |
| Publisher | : Elsevier |
| Total Pages | : 773 |
| Release | : 2011-10-10 |
| Genre | : Technology & Engineering |
| ISBN | : 0080559425 |
Adsorption by Carbons covers the most significant aspects of adsorption by carbons, attempting to fill the existing gap between the fields of adsorption and carbonaceous materials. Both basic and applied aspects are presented. The first section of the book introduces physical adsorption and carbonaceous materials, and is followed by a section concerning the fundamentals of adsorption by carbons. This leads to development of a series of theoretical concepts that serve as an introduction to the following section in which adsorption is mainly envisaged as a tool to characterize the porous texture and surface chemistry of carbons. Particular attention is paid to some novel nanocarbons, and the electrochemistry of adsorption by carbons is also addressed. Finally, several important technological applications of gas and liquid adsorption by carbons in areas such as environmental protection and energy storage constitute the last section of the book. The first book to address the interplay between carbonaceous materials and adsorption Includes important environmental applications, such as the removal of volatile organic compounds from polluted atmospheres Covers both gas-solid and liquid-solid adsorption
Mechanism of Organic Adsorption on Activated Carbon
| Author | : John Thomas Cookson |
| Publisher | : |
| Total Pages | : 72 |
| Release | : 1973 |
| Genre | : Carbon, Activated |
| ISBN | : |
Activated Carbon Adsorption For Wastewater Treatment
| Author | : Jerry. R. Perrich |
| Publisher | : CRC Press |
| Total Pages | : 260 |
| Release | : 2018-01-18 |
| Genre | : Technology & Engineering |
| ISBN | : 1351077910 |
This volume is a guide to the state of the art of activated carbon adsorption technology as applied to wastewater treatment. This book surveys this body of knowledge and is a detailed description of current technology.
The Mechanism of the Adsorption of Gold Cyanide on Activated Carbon
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 1980 |
| Genre | : |
| ISBN | : |
X-ray photoelectron spectroscopy showed that the adsorption of gold cyanide on carbon in the presence or absence of electrolytes and acids proceeds by the same mechanism. Although the identity of the gold cyanide adsorbate is not known, the mechanism appears to have an initial adsorption stage that involves the adsorption of an ion pair: M(n+)[Au(CN)2(-)]n, where M(n+) is a metal ion (for example Na+, K+ and Ca(2+) that has a lower solubility than the Au(CN)2(-) anion in the adsorption medium, followed by a reduction step in which either a sub-stoichiometric Au(CN)x surface species or a cluster-type compound of gold is formed.
Effects of Activated Carbon Characteristics on Organic Contaminant Removal
| Author | : Detlef R. U. Knappe |
| Publisher | : IWA Publishing |
| Total Pages | : 100 |
| Release | : 2004-01-01 |
| Genre | : Science |
| ISBN | : 1843398419 |
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
