Download or read book Adsorption of Methyl Mercuric Chloride on Activated Carbon written by Roger Dean Ammons and published by . This book was released on 1975 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Removing mercuric chloride from aqueous solution by complexation and activated carbon adsorption written by Raymond Henry Austin and published by . This book was released on 1975 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Activated Carbon Adsorption written by Roop Chand Bansal and published by CRC Press. This book was released on 2005-05-24 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Simultaneous Immobilization of Mercury and Polychlorinated Biphynyls from Water Or Sediment Using Polysulfide rubber coated Activated Carbon written by Eun Ah Kim and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This research explores a new method of utilizing activated carbon as a multifunctional amendment to treat mercury and polychlorinated biphenyls (PCBs). The multifunctional material, named polysulfide-rubber polymer-coated activated carbon (PSR-AC), was developed by coating a reactive polymer for mercury on activated carbon. The material achieves multiple functions by facilitating two different reaction sites, the PSR polymer surface and the AC surface, for mercury and hydrophobic compounds respectively. This dissertation focuses on several lines of work that includes the development of polysulfide-rubber as a sorbent, the investigation of a favorable interaction between the PSR polymer and mercuric ions, and the study of hydrophobic interactions between AC and hydrophobic compounds. The results are intended to serve as a basis from which to estimate the chemical stabilities of the immobilized contaminants on the PSR-AC surface. This study was started from the simplest clean water system with only mercuric chloride, and was evolved to include natural organic matter and sediment particles. PSR-AC was prepared by synthesizing the polymer and solvent casting of the dissolved PSR polymer with AC. This process resulted in a polymer coating formed by the gradual invasion of the AC by the polysulfide-rubber polymer. High sulfur loading on activated carbon enhanced mercury adsorption, contributing to a three orders of magnitude reduction in mercury concentration. X-ray photoelectron spectroscopy and Fourier transform infra-red spectroscopy results revealed Hg-S bond formation between PSR-AC and mercuric ions. [mu]-X-ray absorption near edge spectroscopic analyses of the immobilized mercury on the PSR-AC surface suggests the chemical bond with mercury on the surface is a combination of Hg-Cl and Hg-S interactions. [mu]-X-ray fluorescence images of the PSR-AC cross-section elucidated that mercuric ions migrate 0~100 [mu]m inward from the exterior of the particle during three months of treatment in HgCl2 aqueous solution. The presence of a surface-mediated chemical reaction was supported by the [mu]-XANES analysis, showing a large fraction of the total mercuric ions within the PSR-AC particle was in the HgS form. Two mathematical models, based on either a Langmuir sorption isotherm or a kinetic sorption approach, were devised to predict the physicochemical processes involved in the intra-particle migration of mercury in a PSR-AC particle. The results indicate that the transport pathways partly include a non-equilibrium state between PSR and mercuric ions that allows a faster transport rate than when a pure equilibrium state was utilized. The PCB sorption efficiencies of PSR-ACs compared to those of ACs were examined to understand the effect of the polymer-coating on the hydrophobicity of the PSR-AC particle. Comparable PCB removals were observed with sulfur loading levels of less than 8 wt.%. The relative significances of the PSR surface and a hydrophobic surface in sorbing dissolved organic matter-bound mercury (Hg-DOM) removal were also tested using PSR-coated polyethylene (PE). The results suggested higher reaction efficiencies of the PSR polymer per unit area. A favorable interaction between PSR and mercuric ions also improved the overall Hg-DOM removal efficiencies by PSR-AC. The AC and PSR-AC achieved effective mercury removal also from sediment porewater with and without the sediment particles in contact with the sorbents. One month of sediment contact with AC and PSR-AC in quiescent conditions decreased the sediment methylmercury concentrations by 76% and> 91%, respectively. These results prompt further research activities regarding the short- and long-term effects of PSR-AC sediment treatments on mercury bioavailability.
Download or read book Activated Carbon Adsorption of Trace Organic Compounds written by Vernon L. Snoeyink and published by . This book was released on 1977 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mercury Adsorption and Desorption Kinetics written by Mark A. Bentley and published by . This book was released on 2012 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury emissions in the United States are regulated under the Clean Air Mercury Rule. Multiple mercury removal technologies have been investigated and at this time, activated carbon injection into flue gas has been considered to be an efficient and economically feasible method for the removal of elemental mercury. Also, chemical modifications to activated carbon have shown to increase its mercury sorption capacity and removal efficiency. In this study, adsorption of elemental mercury onto ferric chloride impregnated activated carbon was investigated. The results show that ferric chloride impregnated activated carbon has a higher mercury sorption capacity than raw activated carbon does. A chemisorption mechanism was proposed and confirmed based on the characterization tests of fresh and spent sorbents. A kinetic study for the regeneration of spent sorbents was also conducted. The activation energies of mercury desorption from various substrates were calculated and the corresponding mercury desorption profiles were mathematically modeled.
Download or read book Applications in Industry written by and published by Elsevier. This book was released on 1998-12-17 with total page 1091 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume I contains a brief review of adsorption history and its development for practical purposes up until now. It also presents some important information on adsorbents and catalysts as well as on the methods of their characterization. The part of this volume dealing with practical industrial applications includes chapters presenting advanced technical tools for high capacity adsorption separation of liquid and gas mixtures, development of new adsorbents for removal of hazardous contaminants from combustion flue gases and wastewaters, degasification of coal seams and fabrication of inorganic membranes and their applications. A comprehensive review is also included on contemporary utility of self-assembled monolayers, adsorption proteins and their role in modern industry, adsorption methods in technology of optical fibre glasses, sol-gel technology, solid desiccant dehumidification systems, etc. The articles give both the scientific backgrounds of the phenomena discussed and emphasize their practical aspects.The chapters give not only brief current knowledge about the studied problems, but are also a source of topical literature on the subject. A comprehensive bibliography on adsorption principles, design data and adsorbent materials for industrial applications for the period 1967-1997 concludes the book.
Download or read book Activated Carbon Adsorption of Organics from the Aqueous Phase written by I. H. Suffet and published by . This book was released on 1980 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanisms of Adsorption of Hg CN 2 and HgCl2 on to Activated Carbon written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury is found to adsorb on to activated carbon in the form of Hg(CN)2 from cyanide solution. The Hg(CN)4(2-) species displays a negligible affinity for carbon. The adsorptive behaviour of mercuric cyanide species on to activated carbon is shown to be consistent with the distribution profile of the solution species. The adsorption of mercury from chloride solution occurs by reduction to the mercury (I) species, with subsequent precipitation of insoluble Hg2Cl2 within the pores of the carbon.
Download or read book Trace Elements in Water Origin Fate and Control written by and published by . This book was released on 1973 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Colloid Science written by Douglas Hugh Everett and published by Royal Society of Chemistry. This book was released on 1983 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specialist Periodical Reports provide systematic and detailed review coverage of progress in the major areas of chemical research. Written by experts in their specialist fields the series creates a unique service for the active research chemist, supplying regular critical in-depth accounts of progress in particular areas of chemistry. For over 80 years the Royal Society of Chemistry and its predecessor, the Chemical Society, have been publishing reports charting developments in chemistry, which originally took the form of Annual Reports. However, by 1967 the whole spectrum of chemistry could no longer be contained within one volume and the series Specialist Periodical Reports was born. The Annual Reports themselves still existed but were divided into two, and subsequently three, volumes covering Inorganic, Organic and Physical Chemistry. For more general coverage of the highlights in chemistry they remain a 'must'. Since that time the SPR series has altered according to the fluctuating degree of activity in various fields of chemistry. Some titles have remained unchanged, while others have altered their emphasis along with their titles; some have been combined under a new name whereas others have had to be discontinued.
Download or read book Carbon Adsorption Handbook written by Paul N. Cheremisinoff and published by Butterworth-Heinemann. This book was released on 1978 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Colloid Science written by Douglas H Everett and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specialist Periodical Reports provide systematic and detailed review coverage of progress in the major areas of chemical research. Written by experts in their specialist fields the series creates a unique service for the active research chemist, supplying regular critical in-depth accounts of progress in particular areas of chemistry. For over 80 years the Royal Society of Chemistry and its predecessor, the Chemical Society, have been publishing reports charting developments in chemistry, which originally took the form of Annual Reports. However, by 1967 the whole spectrum of chemistry could no longer be contained within one volume and the series Specialist Periodical Reports was born. The Annual Reports themselves still existed but were divided into two, and subsequently three, volumes covering Inorganic, Organic and Physical Chemistry. For more general coverage of the highlights in chemistry they remain a 'must'. Since that time the SPR series has altered according to the fluctuating degree of activity in various fields of chemistry. Some titles have remained unchanged, while others have altered their emphasis along with their titles; some have been combined under a new name whereas others have had to be discontinued.
Download or read book Carbon Adsorption Isotherms for Toxic Organics written by Richard A. Dobbs and published by . This book was released on 1978 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Activated Carbon Adsorption for the Removal of Mercury from Flue Gas Emissions written by Radisav D. Vidic and published by . This book was released on 1996 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Activated Carbon Surface Chemistry Modification on the Adsorption of Mercury from Aqueous Solution written by Emily Kaye Faulconer and published by . This book was released on 2012 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury (Hg), a naturally occurring element, is toxic and can lead to negative health impacts for humans and ecosystems. Activated carbon adsorption is effective in treating Hg-laden aqueous effluent for safe discharge. Two modifications of commercially available activated carbon were investigated: iron impregnation to allow for magnetic sorbent recapture and wet chemical oxidation to enhance aqueous Hg capture. The modified carbons were characterized by nitrogen adsorption-desorption, XRD, pHpzc, vibrating sample magnetometry, elemental analysis, and total acidity titration. The 3:1 C:Fe magnetic powdered activated carbon (MPAC) retained a high surface area of 790 m2/g and was 95% magnetically recoverable, with the iron present primarily as maghemite. The characteristics of the surface oxygen modified carbons varied based on the nature of the modifying reagent and its concentration. The modified carbons were applied to trace level Hg solutions (100 μg/L). The 3:1 MPAC achieved the highest adsorption capacity, reaching 91% Hg removal with 2% volatilized and 84% adsorbed. Adsorption occurs primarily as chemisorption, thus allowing for non-hazardous residuals disposal until reaching a loading of greater than 800 μg Hg/ g MPAC.
Download or read book Adsorption of Free and Complexed Metals from Solution by Activated Carbon written by Alan J. Rubin and published by . This book was released on 1979 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
