acid mine formation

MICROBIAL SULFATE REDUCTION FOR THE TREATMENT OF ACID MINE Acid Mine Drainage Geomicrobiology USGS Microbiology

Simulated acid mine drainage was passed through each carboy and samples of the inflow and outflow were analyzed to determine pH acidity alkalinity and concentrations of Current tasks are examining the role of bacteria in the geochemical stabilization reduced acid production of mine waste rock piles via carbon fixation and sequestration and soil formation Additionally enumeration of major microbial groups overlying an unmined sulfide ore body are in progress to determine pre mining geochemical and microbiological conditions for comparison to

Get Price

The Whitehill Formation as a Potential Analogue to the Acid Rock Drainage and Metal Leaching at the Pebble Mine

745 Lappeenranta Finland Mine Water and Circular Economy IMWA Wolkersdorfer C Sartz L Sillanp M Hkkinen A Editors The Whitehill Formation as a Potential Analogue to the AcidAcid mine drainage may contain copper zinc cadmium and other minerals to which salmon are very sensitive As little as a 2 8 parts per billion increases in copper above natural stream levels damages the ability of salmon to smell and it becomes harder to avoid

Get Price

Microbial factor in acid mine drainage formation CR Scientific Some Chemistry of Acid Mine Drainage

Note Citations are based on reference standards However formatting rules can vary widely between applications and fields of interest or studyIntroduction The mining of coal deposits and metal ores often results in a phenomenon called acid mine drainage AMD This results primarily from the oxidative breakdown of transition metal sulfides especially pyrite FeS 2

Get Price

Microbial communities in acid mine drainageTechnical Document Acid Mine Drainage Prediction

2 yields hot sulfuric acid rich solutions that contain high concentrations of toxic metals In locations where access of oxidants to In locations where access of oxidants to sulfide mineral surfaces is increased by mining the resulting acid mine drainage AMD may contaminate surrounding ecosystemsThe formation of mine acid drainage and the contaminants associated with it has been described by some as the largest environmental problem facing the US mining industry US Forest Service Ferguson and Erickson Lapakko b Commonly referred to as acid rock drainage ARD or acid mine drainage AMD acid drainage from mine waste rock tailings and mine structures such as

Get Price

Acid Mine Drainage Chemistry COTFFundamentals of Mine Drainage Formation and Chemistry

Acid Mine Drainage Chemistry Acid mine drainage impacts stream and river ecosystems through acidity ferric ion Fe 3 precipitation oxygen depletion and release of heavy metals associated with coal and metal mining such as aluminum Al 3 zinc Zn 2 and manganese Mn 2 Fundamentals of Mine Drainage Formation and Chemistry Kathleen S Smith and Thomas R Wildeman Billings Symposium / ASMR Annual Meeting Assessing the Toxicity Potential of Mine Waste Piles Workshop June 1 US Department of the Interior Colorado School of Mines US Geological Survey Acidity pH is a function of 190 Balance between acid generating and acid consuming reactions

Get Price

ELECTROCHEMICAL COVER TECHNOLOGY TO PREVENT THE FORMATION Acid Mine Drainage Innovative Treatment Technologies

prevent the formation of acid mine/acid rock drainage AMD/ARD This new approach complements conventional reclamation strategi Sulphide minerals exhibit semiconductor properties and consequently are amenable to electrochemical manipulation Electronegative polarization can be used to prevent the oxidation of sulphide rich tailings deposits in a manner similar to that used in cathodic Acid Mine Drainage Innovative Treatment Technologies NOTICE This document was prepared by a National Network of Environmental Management Studies grantee under a fellowship from the US Environmental Protection Agency This report was not subject to EPA peer review or technical review EPA makes no warranties expressed or implied including without limitation warranties for

Get Price

Secondary sulfate minerals associated with acid drainage Acid Mine Drainage AMD Causes treatment and case

Secondary sulfate minerals associated with acid drainage in the eastern US recycling of metals and acidity in surficial environments JM Hammarstroma RR Seal IIa AL Meierb JM KornfeldcAcid mine drainage AMD remediation commonly produces byproducts which must be stored or utilized to reduce the risk of further contamination

Get Price

Acid Mine Drainage COTFMicrobial communities in acid mine drainage

Acid mine drainage chemistry provides an in depth discussion of the chemical reactions leading to the formation of acid mine drainage Acid Mine Drainage History of Coal Mining / pH / Conductivity /2 yields hot sulfuric acid rich solutions that contain high concentrations of toxic metals In locations where access of oxidants to In locations where access of oxidants to sulfide mineral surfaces is increased by mining the resulting acid mine drainage AMD may contaminate surrounding ecosystems

Get Price

Acid Mine Drainage AMD causes treatment and case Electrochemical cover technology to prevent the formation

The acid produced dissolves salts and mobilizes heavy metals from mine workings Dark reddish brown water and pH values as low as 25 persist at the site Dark reddish brown water and pH values as low as 25 persist at the siteProceedings of the 25th Annual British Columbia Mine Reclamation Symposium in Campbell River BC The Technical and Research Committee on Reclamation ELECTROCHEMICAL COVER TECHNOLOGY TO PREVENT THE FORMATION OF ACID MINE DRAINAGE M Lina L Seedb D Yetmanb JFyfec W Chesworthd and G Shelpb a School of Engineering University of

Get Price

Heavy metals from acid mine drainage impacts and Acid Mine Drainage Ground Truth Trekking

applied to the acid mine discharges from some 300 mines Mclntyre et al The interaction of factors eg climate geology and hydrological pathways etc controlling metal concentrations in polluted waters and the extent to which they have aAcid Mine Drainage AMD is currently the main pollutant of surface water in the mid Atlantic region AMD is AMD is caused when water flows over or through sulfur bearing materials forming solutions of

Get Price

Acid mine drainage microbewikiAcid Mine Drainage dwagovza

Acid mine drainage AMD occurs when metal sulfides most commonly pyrite are exposed to and react with air and water When water flows over or through sulfur bearing mine tailings a chemical reaction occurs between the water and rocks resulting in metal rich waterAcid Mine Drainage AMD is generated when sulphide bearing minerals often in the form of pyrite which is iron sulphide or FeS2 found inter alia in reefs mined for gold are exposed to oxygen and water This process termed pyrite oxidation is characterised by the generation of sulphuric acid and dissolved iron as illustrated with a typical chemical reaction depicted below

Get Price

THE MICROBIOLOGY OF ACID MINE DRAINAGECoal formation Energy Education

THE MICROBIOLOGY OF ACID MINE DRAINAGE By Jim Taylor PG January Acid mine drainage is a common problem in many parts of the country originating from hardrock mines strip mines or tailing pil Most discussions on acid mine drainage refer to the physical process of oxidation while the role of microorganisms is left unnoticed When iron containing minerals such as pyrite is first The formation of coal takes a significant amount of time on the order of a few million years and the first coal bearing rock units appeared about 290 360 million years ago at a time known as the Carboniferous or coal bearing Period

Get Price

IJASEIT ArticleAcid Mine Drainage Solutions for the Mineral Industry

Acid mine drainage AMD is a term US used to describe command infiltration of acid surface water in the mining areas The study of process for formation acid mine drainage can t be approached by two methods the static and kinetic test In the static test can t determinate acid formation with characterization of Acid Mine Drainage Acid Mine Drainage Acid mine drainage AMD is typically characterized by low pH and high dissolved iron The acid mine drainage may also contain high amounts of CO2 which forms carbonic acid and further depresses the pH

Get Price