Download or read book Reduction of Acid Mine Drainage at Its Source Through the Inhibition of Pyrite Oxidation Using Iron Chelating Reagents written by Aaron J. Pontzer and published by . This book was released on 1996 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of New Reagents for Reduction of Acid Mine Drainage at Its Source written by S. Chander and published by . This book was released on 1994 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acid Mine Drainage Formation and Abatement written by Ohio State University. Research Foundation and published by . This book was released on 1971 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Microbiological Treatment of Acid Mine Drainage Waters written by Louis B. Whitesell and published by . This book was released on 1971 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the study was to determine if the abilities of certain bacteria to oxidize ferrous iron or to convert sulfate to hydrogen sulfide could be applied to the neutralization and subsequent removal of iron from difficult-to-treat mine drainage waters. If one or both of these concepts could be successfully utilized, the expense of adequately treating these types of problem waters might be significantly reduced. Laboratory studies demonstrated that both pure cultures and fresh field cultures of acidophilic iron bacteria could readily oxidize ferrous iron in both synthetic and natural acid mine drainage waters. Approximate requirements of oxygen, carbon dioxide, nitrogen and phosphorus by the iron bacteria were established. Limestone neutralizations of partially oxidized acid mine waters were conducted. Although sulfate-reducing bacteria were isolated, attempts to grow the cultures or produce hydrogen sulfide at pH values below 5.5 were unsuccessful.
Download or read book Potential Acid Mine Drainage Treatment Utilizing Acidophilic Sulfate Reducing Bacteria in an Upflow Bioreactor written by Elise Fay Kittrell and published by . This book was released on 2014 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: "During coal and iron mining, pyrite is often exposed to oxygen, causing acid mine drainage (AMD). Acid mine drainage has characteristic traits of: a rust color, low pH levels (around 3 or 4) and high concentrations of sulfate, metal sulfates and heavy metals. Sulfate reducing bacteria (SRB) are often utilized in acid mine drainage treatment by implementing them into biochemical reactors (BCR). As SRB break down various carbon sources, bicarbonate is produced, raising the pH and generating hydrogen sulfide which reacts with numerous metals. This approach can be troublesome, as SRBs do not thrive at low pH levels often associated with AMD. Previous studies have found acidophilic sulfate reducing bacteria (aSRB) able to reduce sulfate and remove metals at pH values as low as 3.25. However these studies often use easily degradable carbon sources like ethanol, lactic acid and glycerol. In the present study, various solid carbon sources at a pH range of 3.0 to 6.0, high and low sulfate concentration, and media that provided either sulfate or iron as an electron acceptor were tested. Of the five carbon sources, sweet potato and horse manure resulted in black precipitate, indicating possible sulfate reduction. To mimic a BCR, column studies were conducted. After flowing pH 3.5 to 4.0 synthetic AMD through the upflow columns for 117 days, pH was raised to between 6.0 and 7.0. Sulfate reduction was evident in one column containing sweet potato and inoculum, but no others were active in this ongoing study. A leading hypothesis is that complete reduction was inhibited by the presence of fermenting bacteria."--Abstract, page iii.
Download or read book Studies on Limestone Treatment of Acid Mine Drainage written by Bituminous Coal Research, Inc and published by . This book was released on 1970 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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:
Download or read book Pyrite Oxidation in Relation to Acid Mine Drainage written by Kristina Banovac and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research on the Inhibition of Bacterial Oxidation of Pyrite and the Concomitant Acid Mine Drainage written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors Controlling the Generation of Acid Mine Drainage written by and published by . This book was released on 1982 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Accelerated Pyrite Oxidation enhanced Alkalinity Couple to Reduce Acid Mine Drainage written by F. T. Caruccio and published by . This book was released on 1991 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acid Mine Drainage Formation and Abatement written by Ohio State University (Columbus). Research Foundation and published by . This book was released on 1971 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Accelerated Pyrite Oxidation enhanced Alkalinity Couple to Reduce Acid Mine Drainage written by F. T. Caruccio and published by . This book was released on 1991 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbiological Treatment of Acid Mine Drainage Waters written by Louis B. Whitesell and published by . This book was released on 1971 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the study was to determine if the abilities of certain bacteria to oxidize ferrous iron or to convert sulfate to hydrogen sulfide could be applied to the neutralization and subsequent removal of iron from difficult-to-treat mine drainage waters. If one or both of these concepts could be successfully utilized, the expense of adequately treating these types of problem waters might be significantly reduced. Laboratory studies demonstrated that both pure cultures and fresh field cultures of acidophilic iron bacteria could readily oxidize ferrous iron in both synthetic and natural acid mine drainage waters. Approximate requirements of oxygen, carbon dioxide, nitrogen and phosphorus by the iron bacteria were established. Limestone neutralizations of partially oxidized acid mine waters were conducted. Although sulfate-reducing bacteria were isolated, attempts to grow the cultures or produce hydrogen sulfide at pH values below 5.5 were unsuccessful.
Download or read book A Review written by V. P. Evangelou and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
