The Mechanism And Conditions Of Pyrite Surface Passivation Layer Formation In Preventing Its Oxidation

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The Mechanism and Conditions of Pyrite Surface Passivation Layer Formation in Preventing Its Oxidation

Author : Shengjia Zeng
Publisher :
ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.:/5 (93 download)

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Book Synopsis The Mechanism and Conditions of Pyrite Surface Passivation Layer Formation in Preventing Its Oxidation by : Shengjia Zeng

Download or read book The Mechanism and Conditions of Pyrite Surface Passivation Layer Formation in Preventing Its Oxidation written by Shengjia Zeng and published by . This book was released on 2014 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acid mine drainage (AMD), an acidic and dissolved metal effluent from oxidative dissolution of sulphide minerals, particularly pyrite, in waste rock dumps and tailings dams, has serious impacts on the receiving environment. Legislation on mine waste management and AMD emission and heavy financial burdens for AMD treatment have forced mining operators to look for improved, cost-effective alternatives for reducing acid generation from the source during mining operations and after closure of the mine. Currently, there are many options to diminish sulphide or pyrite oxidation including passivating barrier methods that aim to isolate pyrite surfaces from oxygen or water, chemical additives and inhibition of iron-oxidising and sulphide oxidising bacteria. Moderation of pyrite oxidation can significantly lower acid generation rates and reduce AMD emission. This dissertation is composed of fundamental and applied studies that aim to understand formation conditions of surface coatings on pyrite surface and the effectiveness of these coatings in preventing the oxidation process which is the primary source of acid mine drainage.

Pyrite Oxidation and Its Control

Author : V. P. Evangelou
Publisher : CRC Press
ISBN 13 : 1351420798
Total Pages : 308 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Pyrite Oxidation and Its Control by : V. P. Evangelou

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.

Alkaline Pressure Oxidation of Pyrite in the Presence of Silica - Characterization of the Passivating Film

Author : Anirudha Dani
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Alkaline Pressure Oxidation of Pyrite in the Presence of Silica - Characterization of the Passivating Film by : Anirudha Dani

Download or read book Alkaline Pressure Oxidation of Pyrite in the Presence of Silica - Characterization of the Passivating Film written by Anirudha Dani and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Industrial Waste Engineering

Author : Lawrence K. Wang
Publisher : Springer Nature
ISBN 13 : 3031467477
Total Pages : 570 pages
Book Rating : 4.0/5 (314 download)

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Book Synopsis Industrial Waste Engineering by : Lawrence K. Wang

Download or read book Industrial Waste Engineering written by Lawrence K. Wang and published by Springer Nature. This book was released on 2023 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses: (1) the treatment of hazardous sludge, wastewater, textile effluent, contaminated groundwater, laboratory waste, toxic dye, heavy metals, acid mine drainage and palm oil effluent; (2) the technologies of stabilization, solidification, natural coagulation-flocculation, river catchment control and mitigation, dredging and mining operations, and (3) the management of acid mines, laboratories, nano pollutants and plant effluents.

Control of Pyrite Surface Chemistry in Physical Coal Cleaning. Final Report

Author :
Publisher :
ISBN 13 :
Total Pages : 63 pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Control of Pyrite Surface Chemistry in Physical Coal Cleaning. Final Report by :

Download or read book Control of Pyrite Surface Chemistry in Physical Coal Cleaning. Final Report written by and published by . This book was released on 1993 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Part I, Surface Chemistry of Coal Pyrite the mechanisms responsible for the inefficient rejection of coal pyrite were investigated using a number of experimental techniques. The test results demonstrate that the hydrophobicity of coal pyrite is related to the surface products formed during oxidation in aqueous solutions. During oxidation, a sulfur-rich surface layer is produced in near neutral pH solutions. This surface layer is composed mainly of sulfur species in the form of an iron-polysulfide along with a smaller amount of iron oxide/hydroxides. The floatability coal pyrite increases dramatically in the presence of frothers and hydrocarbon collectors. These reagents are believed to absorb on the weakly hydrophobic pyrite surfaces as a result of hydrophobic interaction forces. In Part III, Developing the Best Possible Rejection Schemes, a number of pyrite depressants were evaluated in column and conventional flotation tests. These included manganese (Mn) metal, chelating agents quinone and diethylenetriamine (DETA), and several commercially-available organic depressants. Of these, the additives which serve as reducing agents were found to be most effective. Reducing agents were used to prevent pyrite oxidation and/or remove oxidation products present on previously oxidized surfaces. These data show that Mn is a significantly stronger depressant for pyrite than quinone or DETA. Important factors in determining the pyrite depression effect of Mn include the slurry solid content during conditioning, the addition of acid (HCl), and the amount of Mn. The acid helps remove the oxide layer from the surface of Mn and promotes the depression of pyrite by Mn.

Low Carbon Stabilization and Solidification of Hazardous Wastes

Author : Daniel C.W. Tsang
Publisher : Elsevier
ISBN 13 : 0128242523
Total Pages : 592 pages
Book Rating : 4.1/5 (282 download)

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Book Synopsis Low Carbon Stabilization and Solidification of Hazardous Wastes by : Daniel C.W. Tsang

Download or read book Low Carbon Stabilization and Solidification of Hazardous Wastes written by Daniel C.W. Tsang and published by Elsevier. This book was released on 2021-09-24 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low Carbon Stabilization and Solidification of Hazardous Wastes details sustainable and low-carbon treatments for addressing environmental pollution problems, critically reviewing low-carbon stabilization/solidification technologies. This book presents the latest state-of-the-art knowledge of low-carbon stabilization/solidification technologies to provide cost-effective sustainable solutions for real-life environmental problems related to hazardous wastes including contaminated sediments. As stabilization/solidification is one of the most widely used waste remediation methods for its versatility, fast implementation and final treatment of hazardous waste treatment, it is imperative that those working in this field follow the most recent developments. Low Carbon Stabilization and Solidification of Hazardous Wastes is a necessary read for academics, postgraduates, researchers and engineers in the field of environmental science and engineering, waste management, and soil science, who need to keep up to date with the most recent advances in low-carbon technologies. This audience will develop a better understanding of these low-carbon mechanisms and advanced characterization technologies, fostering the future development of low-carbon technologies and the actualization of green and sustainable remediation. Focuses on stabilization/solidification for environmental remediation, as one of the most widely used environmental remediation technologies in field-scale applications Details the most advanced and up-to-date low-carbon sustainable technologies necessary to guide future research and sustainable development Provides comprehensive coverage of low-carbon solutions for treating a variety of hazardous wastes as well as contaminated soil and sediment

Kinetics and Mechanisms of Pyrite (FeS2) Oxidation in the Formation of Acid Mine Drainage

Author : Abbas Hussain Mirza
Publisher :
ISBN 13 :
Total Pages : 548 pages
Book Rating : 4.:/5 (33 download)

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Book Synopsis Kinetics and Mechanisms of Pyrite (FeS2) Oxidation in the Formation of Acid Mine Drainage by : Abbas Hussain Mirza

Download or read book Kinetics and Mechanisms of Pyrite (FeS2) Oxidation in the Formation of Acid Mine Drainage written by Abbas Hussain Mirza and published by . This book was released on 1993 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Passive Treatments for Mine Drainage

Author : Cassandra Chidiac
Publisher : Springer Nature
ISBN 13 : 3031320492
Total Pages : 144 pages
Book Rating : 4.0/5 (313 download)

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Book Synopsis Passive Treatments for Mine Drainage by : Cassandra Chidiac

Download or read book Passive Treatments for Mine Drainage written by Cassandra Chidiac and published by Springer Nature. This book was released on 2023-10-03 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book allows readers to grasp both the fundamentals and the latest technological advances in the field of mine drainage, which is increasingly crucial both environmentally and economically. Its extensive coverage of current and promising passive treatment technologies, combined with numerous practical guides, makes it an indispensable tool for early researchers seeking promising trends and identifying gaps. The book systematically explores recent literature on passive treatment research, classifying them as preventative, in-situ, and ex-situ solutions. It covers relevant passive treatments such as permeable reactive barriers, constructed wetlands, gravel bed reactors, saturated rock fills, and passivation techniques, among other common source control tactics. Each technology is discussed in terms of principal mechanisms, state-of-the-art technological advances, advantages and disadvantages, and suitability for a given mine drainage chemistry and flow regime. The book provides a comprehensive view of the entire field, offering researchers and policymakers a reference guide, research ideas, understanding, and practical applications for each technology. Furthermore, the contains an overview of recent trends in material selection for passive treatment applications, primarily through the use of industrial waste and by-products, which incorporate more sustainable practices in mine drainage remediation. Uniquely, the manuscript includes a flowchart based on water chemistry and flow rates to guide readers to ideal treatment options, along with written analysis to further support the readers’ decision-making. Overall, this equips early researchers in the field with knowledge of fundamentals and promising research routes when dealing with different mine drainage complexities while also providing them with promising research avenues that can advance the field further.

Metals Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 972 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Metals Abstracts by :

Download or read book Metals Abstracts written by and published by . This book was released on 1999-04 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Chemical Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 2682 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Chemical Abstracts by :

Download or read book Chemical Abstracts written by and published by . This book was released on 1991 with total page 2682 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Sulfide Mineralogy and Geochemistry

Author : David J. Vaughan
Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 1501509497
Total Pages : 728 pages
Book Rating : 4.5/5 (15 download)

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Book Synopsis Sulfide Mineralogy and Geochemistry by : David J. Vaughan

Download or read book Sulfide Mineralogy and Geochemistry written by David J. Vaughan and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-12-17 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 61 of Reviews in Mineralogy and Geochemistry presents an up-to-date review of sulfide mineralogy and geochemistry. The crystal structures, electrical and magnetic properties, spectroscopic studies, chemical bonding, thermochemistry, phase relations, solution chemistry, surface structure and chemistry, hydrothermal precipitation processes, sulfur isotope geochemistry and geobiology of metal sulfides are reviewed. Where it is appropriate for comparison, there is brief discussion of the selenide or telluride analogs of the metal sulfides. When discussing crystal structures and structural relationships, the sulfosalt minerals as well as the sulfides are considered in some detail.

The Science of the Total Environment

Author :
Publisher :
ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.:/5 (49 download)

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Book Synopsis The Science of the Total Environment by :

Download or read book The Science of the Total Environment written by and published by . This book was released on 1995 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: An international journal for scientific research into the environment and its relationship with man.

Monitored Natural Attenuation of Inorganic Contaminants in Ground Water

Author :
Publisher :
ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Monitored Natural Attenuation of Inorganic Contaminants in Ground Water by :

Download or read book Monitored Natural Attenuation of Inorganic Contaminants in Ground Water written by and published by . This book was released on 2007 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: V.3 ... consists of individual chapters that describe 1) the conceptual background for radionuclides, including tritium, radon, strontium, technetium, uranium, iodine, radium, thorium, cesium, plutonium-americium and 2) data requirements to be met during site characterization.

Copper and Bronze in Art

Author : David A. Scott
Publisher : Getty Publications
ISBN 13 : 9780892366385
Total Pages : 536 pages
Book Rating : 4.3/5 (663 download)

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Book Synopsis Copper and Bronze in Art by : David A. Scott

Download or read book Copper and Bronze in Art written by David A. Scott and published by Getty Publications. This book was released on 2002 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a review of 190 years of literature on copper and its alloys. It integrates information on pigments, corrosion and minerals, and discusses environmental conditions, conservation methods, ancient and historical technologies.

Modern Electrochemistry 2B

Author : John O'M. Bockris
Publisher : Springer Science & Business Media
ISBN 13 : 0306480360
Total Pages : 553 pages
Book Rating : 4.3/5 (64 download)

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Book Synopsis Modern Electrochemistry 2B by : John O'M. Bockris

Download or read book Modern Electrochemistry 2B written by John O'M. Bockris and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book had its nucleus in some lectures given by one of us (J. O’M. B. ) in a course on electrochemistry to students of energy conversion at the University of Pennsyl- nia. It was there that he met a number of people trained in chemistry, physics, biology, metallurgy, and materials science, all of whom wanted to know something about electrochemistry. The concept of writing a book about electrochemistry which could be understood by people with very varied backgrounds was thereby engendered. The lectures were recorded and written up by Dr. Klaus Muller as a 293-page manuscript. At a later stage, A. K. N. R. joined the effort; it was decided to make a fresh start and to write a much more comprehensive text. Of methods for direct energy conversion, the electrochemical one is the most advanced and seems the most likely to become of considerable practical importance. Thus, conversion to electrochemically powered transportation systems appears to be an important step by means of which the difficulties of air pollution and the effects of an increasing concentration in the atmosphere of carbon dioxide may be met. Cor- sion is recognized as having an electrochemical basis. The synthesis of nylon now contains an important electrochemical stage. Some central biological mechanisms have been shown to take place by means of electrochemical reactions. A number of American organizations have recently recommended greatly increased activity in training and research in electrochemistry at universities in the United States.

Mechanisms of Inorganic Reactions

Author : Fred Basolo
Publisher :
ISBN 13 :
Total Pages : 701 pages
Book Rating : 4.:/5 (66 download)

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Book Synopsis Mechanisms of Inorganic Reactions by : Fred Basolo

Download or read book Mechanisms of Inorganic Reactions written by Fred Basolo and published by . This book was released on 1967 with total page 701 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Chemistry of Gold Extraction

Author : John Marsden
Publisher : SME
ISBN 13 : 9780873352406
Total Pages : 688 pages
Book Rating : 4.3/5 (524 download)

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Book Synopsis The Chemistry of Gold Extraction by : John Marsden

Download or read book The Chemistry of Gold Extraction written by John Marsden and published by SME. This book was released on 2006 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensively revised and updated, this edition provides the broad base of knowledge required by all working in the gold extraction and gold processing industries. It bridges the gap between research and industry by emphasizing practical applications of chemical principles and techniques.