Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download Control Of Eh And Ph To Evaluate The Rate Of Pyrite Oxidation full books in PDF, epub, and Kindle. Read online Control Of Eh And Ph To Evaluate The Rate Of Pyrite Oxidation ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author : Kevin John Breen
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (557 download)
Download or read book Control of Eh and PH to Evaluate the Rate of Pyrite Oxidation written by Kevin John Breen and published by . This book was released on 1982 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : V. P. Evangelou
Publisher : CRC Press
ISBN 13 : 1351420798
Total Pages : 308 pages
Book Rating : 4.3/5 (514 download)
Download or read book Pyrite Oxidation and Its Control written by V. P. Evangelou and published by CRC Press. This book was released on 2018-04-27 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pyrite Oxidation and its Control is the single available text on the market that presents the latest findings on pyrite oxidation and acid mine drainage (AMD). This new information is an indispensable reference for generating new concepts and technologies for controlling pyrite oxidation. This book focuses on pyrite oxidation theory, experimental findings on oxidation mechanisms, as well as applications and limitations of amelioration technologies. The text also includes discussions on the theory and potential application of novel pyrite microencapsulation technologies for controlling pyrite oxidation currently under investigation in the author's laboratory.
Author : V. P. Evangelou
Publisher : CRC Press
ISBN 13 : 1351420801
Total Pages : 304 pages
Book Rating : 4.3/5 (514 download)
Download or read book Pyrite Oxidation and Its Control written by V. P. Evangelou and published by CRC Press. This book was released on 2018-04-27 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pyrite Oxidation and its Control is the single available text on the market that presents the latest findings on pyrite oxidation and acid mine drainage (AMD). This new information is an indispensable reference for generating new concepts and technologies for controlling pyrite oxidation. This book focuses on pyrite oxidation theory, experimental findings on oxidation mechanisms, as well as applications and limitations of amelioration technologies. The text also includes discussions on the theory and potential application of novel pyrite microencapsulation technologies for controlling pyrite oxidation currently under investigation in the author's laboratory.
Author : Martin B. Goldhaber
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (8 download)
Download or read book Experimental Study of Pyrite Oxidation at PH 6-9 and 30-degree C written by Martin B. Goldhaber and published by . This book was released on 1980 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Martin B. Goldhaber
Publisher :
ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.:/5 (77 download)
Download or read book Experimental Study of Pyrite Oxidation at PH 6-9 and 300 C written by Martin B. Goldhaber and published by . This book was released on 1980 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Martin B. Goldhaber
Publisher :
ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.:/5 (77 download)
Download or read book Experimental Study of Pyrite Oxidation at PH 6-9 and 30° C written by Martin B. Goldhaber and published by . This book was released on 1980 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Donald G. Foot
Publisher :
ISBN 13 :
Total Pages : 434 pages
Book Rating : 4.F/5 ( download)
Download or read book Evaluation of Methods for Recovery of Potash from Carnallite Ore written by Donald G. Foot and published by . This book was released on 1984 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (685 download)
Download or read book Controlling of Incipient Oxidation of Pyrite for Improved Rejection. Sixth Quarterly Technical Progress Report, January 1, 1994--March 31, 1994 written by and published by . This book was released on 1994 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major objectives of this work are (1) to determine the Eh-pH conditions under which pyrite is stable, (2) to determine the mechanism of the initial stages of pyrite oxidation, and (3) to determine if the semiconducting properties of pyrite affect its oxidation behavior. It is known that moderate oxidation of pyrite produces a hydrophobic surface product. This hydrophobic product makes it extremely difficult to depress pyrite in coal flotation circuits. The eventual objective of this work is to prevent pyrite oxidation in order to better depress pyrite in coal flotation circuits. In this work clean, unoxidized pyrite surfaces are being produced by fracturing pyrite electrodes in an electrochemical cell. It has been shown that by holding the potential at different values during fracture and measuring the current passed at fracture, pyrite oxidation or reduction can be precisely controlled, or prevented. It has also been found that fresh pyrite surfaces, created by fracture in an electrochemical cell, begin to oxidize at potentials that are about 200 mV more negative than the potentials reported in the literature for pyrite oxidation. This is attributed to the fact that most work on pyrite has employed polished electrodes that have preexisting oxidation products on the surface. Electrochemical reduction and oxidation of these preexisting products essentially mask the oxidation of pyrite itselL In addition, photocurrent measurements show that freshly-fractured pyrite surfaces are charged negatively. This negative charge is believed to result from an intrinsic, acceptor-like surface state. This report period, voltammetric and photocurrent studies have been carried out as a function of pH and the photoresponse of pyrites from different sources have been determined.
Author :
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (727 download)
Download or read book Control of Pyrite Surface Chemistry in Physical Coal Cleaning written by and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past 10 years, much research has provided convincing evidence that one major difficulty in using froth flotation to separate pyrite from coal is the self-induced'' flotation of pyrite. Numerous studies have attempted to identify reactions that occur under moderate oxidizing conditions, which lead to self-induced flotation, and to identify the oxidization products. During the past two report periods, it was established that: (1) freshly fractured pyrite surfaces immediately assume, at fracture, an electrode potential several hundred millivolts more negative than the usual steady state mixed potentials. Within minutes after fracture, the electrodes oxidize and reach higher steady state potentials. It was also shown, by photocurrent measurements, that a negative surface charge (upward band bending) already exists on freshly fractured pyrite, and (2) particle bed electrodes can be used to control the oxidation of pyrite and to precisely determine the electrochemical conditions where flotation occurs, or is depressed. By circulating the solution phase to an ultraviolet spectrometer, soluble products produced on pyrite by oxidation and reduction can be determined, e.g., HS[sup [minus]] was identified as a soluble cathodic reduction product. These and other studies have provided considerable information concerning the anodic oxidation of pyrite. Much less is known about the mechanism and kinetics of oxygen reduction, the other half of the mixed potential reaction. To better understand pyrite oxidation kinetics and determine if oxygen reduction is rate determining, studies have been conducted during this report period on the oxygen reduction reaction with pyrite. In addition, to provide further support that the potential of particle bed electrodes can be controlled, the electro-adsorption and desorption of an organic surfactant was studied.
Author : United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on Energy and the Environment
Publisher :
ISBN 13 :
Total Pages : 416 pages
Book Rating : 4.0/5 ( download)
Download or read book Tenth Anniversary of the Surface Mining Control and Reclamation Act of 1977 written by United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on Energy and the Environment and published by . This book was released on 1988 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Taylor Alexander van Hoorebeke
Publisher :
ISBN 13 : 9781369656565
Total Pages : 87 pages
Book Rating : 4.6/5 (565 download)
Download or read book Oxidation Kinetics of Pyrite in Synthetic Seawater written by Taylor Alexander van Hoorebeke and published by . This book was released on 2016 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the demand for industrial materials rises, mining companies have become increasingly interested in exploiting unconventional metal resources. Seafloor massive sulfide (SMS) deposits, one such example of an unconventional resource, will be mined for their high ore grade and abundance along oceanic plate margins. As these deposits are mined, fresh and highly reactive surfaces of sulfide minerals will be exposed to seawater, causing them to immediately oxidize. Pyrite (FeS2) is the most common sulfide mineral and readily oxidizes under atmospheric conditions. Sulfuric acid is a product of the sulfide mineral oxidation process and is often responsible for the devastating effects of acid mine drainage at terrestrial mining sites. Kinetics experiments have been conducted to determine a rate law for the abiotic rate of pyrite oxidation in synthetic seawater. Experiments run from pH 2-5, 0.995 or 0.10 atm O2, and temperatures of 285 - 303 K were used in rate law calculations. The experimentally derived molal specific rate law is: Rsp = -10-11.02±0.03[H+]0.39±0.03[PO2]0.44±0.05 where [H+] and [PO2] represent the initial molal concentrations of protons and dissolved oxygen in the seawater, and the rate Rsp is in units of moles m-2 sec-1. The initial rate method was combined with the method of isolation to determine the effects that pH, dissolved oxygen concentration, and temperature have on the pyrite oxidation rate. Results show that the initial concentration of dissolved oxygen is more influential upon the initial pyrite oxidation rate than the initial pH of the seawater under acidic, low temperature conditions. The pyrite oxidation rate in acidic seawater is the slowest of the sulfides pyrite, pyrrhotite, and chalcopyrite, with the reaction proceeding up to three orders of magnitude slower than that of pyrrhotite in synthetic seawater. The slow pyrite weathering rate (whether natural or anthropogenically induced) enhanced pyrite preservation in massive sulfide deposits. This may explain why VMS deposits are more enriched in pyrite than any other sulfide mineral.
Author : United States. Bureau of Mines
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (2 download)
Download or read book Information Circular written by United States. Bureau of Mines and published by . This book was released on 1982 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 710 pages
Book Rating : 4.0/5 ( download)
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1990 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 690 pages
Book Rating : 4.F/5 ( download)
Download or read book Premining Investigations for Hardrock Mines written by and published by . This book was released on 1982 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Suresh Bhargava
Publisher : MDPI
ISBN 13 : 3038424641
Total Pages : 335 pages
Book Rating : 4.0/5 (384 download)
Download or read book Hydrometallurgy written by Suresh Bhargava and published by MDPI. This book was released on 2018-07-02 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Hydrometallurgy" that was published in Metals
Author :
Publisher :
ISBN 13 :
Total Pages : 436 pages
Book Rating : 4.X/5 (1 download)
Download or read book Mine Drainage and Surface Mine Reclamation written by and published by . This book was released on 1988 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.3/5 (91 download)
Download or read book Information Circular written by and published by . This book was released on 1982 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
