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 Gold Metallurgy and the Environment written by Sadia Ilyas and published by CRC Press. This book was released on 2018-02-19 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives an overview of all the gold extraction processes along with their mechanistic study and environmental impact. Reviews extraction techniques previously employed as well as recently evolved technology for gold leaching, provides technical flow sheets for processing of ores with a diversity of lixiviants and offers a compulsory overview of every gold processing technique It also discusses recent integrated techniques including hydro- and bio-metallurgical techniques with examples
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 Chemistry Physics of Carbon written by Ljubisa R. Radovic and published by CRC Press. This book was released on 2000-11-09 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Provides an overview of scientific and technological issues in environmental applications of carbon materials. Emphasizes the versatility of carbon materials in both gas- and liquid-phase environmental applications, including a discussion of emerging technologies. Highlights the power and potential opportunities afforded by NMR spectroscopy for understanding the interaction of carbon materials with adsorbed molecules."
Download or read book The Mechanism of Adsorption of Dicyanoaurate on Activated Carbon written by Arturo Sabio Ibrado and published by . This book was released on 1992 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanisms of Adsorption of Ag CN 2 and Ag on to Activated Carbon written by and published by . This book was released on 1992 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silver is adsorbed onto activated carbon from potassium cyanide solution initially in the form of the K+Ag(CN)2- ion pair. Infrared spectra suggest that the cyanide stretching frequency for Ag(CN)2- is shifted to lower wavenumbers upon adsorption, to approximately that of Ag(CN)4 3-. This may be a result of an aggregation of the species on the carbon surface. Boiling in hydrochloric acid results in the formation of AgCN and AgCl. The presence of AgCN is also indicated on Ag(CN)2- -loaded carbons that have dried at temperatures of 120 degrees C or higher. Subsequent treatment with hot sodium hydroxide solution results in the reduction of all of the silver on the carbon to the metallic state, with some desorption of Ag(CN)2-. When silver is loaded onto activated carbon from a silver nitrate solution, adsorption takes place via a dual mechanism, with reduction to metallic silver and precipitation of AgCl both taking place on the carbon surface.
Download or read book Waste Minimisation and End of Pipe Treatment in Chemical and Petrochemical Industries written by G. Buitron and published by IWA Publishing (International Water Assoc). This book was released on 2000-05-31 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Efficient non-polluting use of resources by the chemical industries requires an integrated and cost effective approach that is both holistic and multimedia. Beneficial present and future resource use should be preserved with a focus on public health and environmental protection. These proceedings contain 59 papers selected both from the oral and poster presentations, representing the best contributions to a conference with the specific aim of evaluating technologies and sharing experiences for minimization and end of pipe treatment of wastes in the chemical/petrochemical industries. This distinctive multidimensional perspective is reflected in the topics covered: wastewater minimization and management; water and wastewater characterisation; physicochemical, aerobic, anaerobic and combined wastewater treatment processes; textile waste treatment; site restoration; and volatile organic compounds treatment. Attention is given to the interaction between source control and end of pipe treatment, where changes in the first often influence the performance of the second. Owing to increasingly stringent effluent requirements including toxicity limits and ecotoxicological concerns, source control is the preferred option for waste management. The opportunities for research and improvements in practical application, as well as the need of enhanced international cooperation between disciplines, are critical to addressing current multifaceted concerns and feature strongly in the high-quality work assembled here.
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 Adsorption of Hg II from Aqueous Solutions Onto Activated Carbon written by Jean Maillet and published by . This book was released on 1972 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adsorption of the Cyano Complexes of Groups IB and IIB Metals on Activated Carbon written by Arturo Sabio Ibrado and published by . This book was released on 1986 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanism of Adsorption of Au CN 4 Onto Activated Carbon written by and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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(-).
Download or read book The Mechanism of the Adsorption of Gold Cyanide on Activated Carbon written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Cleaner Combustion written by Derek Dunn-Rankin and published by MDPI. This book was released on 2019-11-20 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides unique views of combustion from many technical and international research perspectives. Combustion science is often considered from its negative environmental impact, where we find, instead, that energy release from fuels of all kinds have promoted human endeavor throughout history. This volume tries to capture some of these positive features by showing a range of work examining unusual fuels and controlling the pollution from them.
Download or read book Nanomaterials for Water Remediation written by Ajay Kumar Mishra and published by Smithers Rapra. This book was released on 2016-07-14 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials have shown supreme potential in overcoming the major challenges posed by both the conventional as well as nano-enabled water purification systems. Remediation is the process of transforming the pollutants present in water from toxic to below the limits stipulated by national/international guidelines. Water remediation is the process of obtaining clean water from decontaminated water and is currently a huge challenge for the global scientific community.Volume 2 focuses on the use of inorganic oxides including metal and non-metal oxide materials for water remediation. This book also covers the broad discussion regarding various metal and non-metal oxides as well as nanoadsorbent metals, nanoparticles, cryogels and bentonites for the removal of the various organic and inorganic pollutants from wastewater. Water pollution is mainly caused by contaminants and can cause severe environmental and health issues. It is a well-established fact that nanomaterials have better adsorption capacity, selectivity and stability than nanoparticles.This book also covers the broad areas of nanotechnology, engineering, environmental science and water research, and will be of great benefit to researchers involved in these fields. The book provides a platform for all researchers as it covers considerable background from recent literature, including the abbreviations used. In addition, this book covers the broader research areas of chemistry, physics, materials science, composites, engineering and nanotechnology to present a multidisciplinary approach.
Download or read book Bibliography of Solid Adsorbents written by Victor Reuel Deitz and published by . This book was released on 1944 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Behavior of Metals in Soils written by Joan E. McLean and published by . This book was released on 1992 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
