Sterling – HTML5 Responsive Website Template

acid mine formation

image

Imine Formation - California State University, Dominguez Hills

Last time We looked at the formation of a hemiacetal and an acetal from an aldehyde and an alcohol. In both this case and the previous case in which we added water to an aldehyde, the first steps involved acid-catalyzed addition of a nucleophile to the carbonyl carbon of an aldehyde.

Online chat

image

THE MICROBIOLOGY OF ACID MINE DRAINAGE

THE MICROBIOLOGY OF ACID MINE DRAINAGE By Jim Taylor, P.G. January 1996 Acid mine drainage is a common problem in many parts of the country, originating from hardrock mines, strip mines or tailing piles. Most discussions on acid mine drainage refer to the physical process of oxidation while the role of microorganisms is left unnoticed.

Online chat

image

Sulfide oxidation and acid mine drainage formation within ...

 · Two processes leading to the formation of mine drainage at this stage could be highlighted (1) a neutral Fe(II) plume forming in the impoundment with ferrihydrite precipitation at its outcrop and (2) acid mine drainage seeping in the unsaturated zone of the active dam, leading to the formation …

Online chat

image

2014 OPEN ACCESS minerals

For the proper understanding of the formation of acid mine drainage, the biogeochemical interactions and the sequences in these processes have to be understood. This chapter is taken from Dold [4] for the convenience of the reader and more details on this issue can be found in this open access book …

Online chat

image

Acid mine drainage formation and abatement. (Book, 1971 ...

Get this from a library! Acid mine drainage formation and abatement.. [Ohio State University. Research Foundation.; United States. Environmental Protection Agency. Water Quality Office.]

Online chat

image

What can be done to prevent or clean up acid mine drainage ...

Water flowing through active or abandoned mine sites can become polluted by the material being mined[1]. By far the most common mine drainage problem is that of acid mine drainage (AMD). Sulfuric acid is produced when water interacts with sulfur-bearing materials in the presence of oxygen and …

Online chat

image

A critical stage in the formation of acid mine drainage ...

4 Yang Zhao, Peng Chen, Wenbin Nan, Dejuan Zhi, Ronghui Liu, Hongyu Li, The use of (5Z)-4-bromo-5-(bromomethylene)-2(5H)-furanone for controlling acid mine drainage through the inhibition of Acidithiobacillus ferrooxidans biofilm formation, Bioresource Technology, 2015, 186, 52CrossRef

Online chat

image

Acid Mine Drainage - Office of Surface Mining

Acid Mine Drainage Research Acid mine drainage (AMD) has been the subject of intensive research since the 1960's. Research efforts have proceeded recently through the Acid Drainage Technology Initiative. The major areas of research on AMD are Prediction of AMD and Prevention/Mitigation. The following is an overview of information on some major ...

Online chat

image

SECTION VI Chemical Aspects of Acid Formation (pyrrhotite ...

FORMATION AND TRANSPORT OF ACID MINE DRAINAGE Chemical Aspects of Acid Formation The sulfur-bearing minerals which predominate in coal seams are the iron sulfide ores pyrite, marcasite, amorphous 'sulfur-balls', and less commonly the monosulfide pyrrhotite. Excluding pyrrhotite, all have …

Online chat

image

What can be done to prevent or clean up acid mine drainage ...

Water flowing through active or abandoned mine sites can become polluted by the material being mined[1]. By far the most common mine drainage problem is that of acid mine drainage (AMD). Sulfuric acid is produced when water interacts with sulfur-bearing materials in the presence of oxygen and …

Online chat

image

Jarosite versus Soluble Iron-Sulfate Formation and Their ...

Jarosite versus Soluble Iron-Sulfate Formation and Their Role in Acid Mine Drainage Formation at the Pan de Azúcar Mine Tailings (Zn-Pb-Ag), NW Argentina. Jesica Murray 1,*, Alicia Kirschbaum 1, Bernhard Dold 2, Edi Mendes Guimaraes 3 and Elisa Pannunzio Miner 4. 1.

Online chat

image

Study of pH Influence on Selective Precipitation of Heavy ...

Study of pH Influence on Selective Precipitation of Heavy Metals from Acid Mine Drainage Magdalena Balintova*, Aneta Petrilakova Technical University of Kosice, Civil Engineering Faculty, Institute of Building and Environmental Engineering Vysokoskolska 4, 042 00 Kosice, Slovakia, [email protected] Acid mine …

Online chat

image

Heavy metals from acid mine drainage - impacts and ...

Heavy metals from acid mine drainage - impacts and modelling strategies ... penetrates the rock allowing the formation of iron sulphate salts which can be dissolved in groundwater. Contaminated groundwater contains dissolved iron salts and high levels ... applied to the acid mine discharges from some 300 mines (Mclntyre et al., 1990).

Online chat

image

Evolution of Acid Mine Drainage Formation in Sulphidic ...

Sulphidic mine tailings are among the largest mining wastes on Earth and are prone to produce acid mine drainage (AMD). The formation of AMD is a sequence of complex biogeochemical and mineral dissolution processes. It can be classified in three main steps occurring from the operational phase of a tailings impoundment until the final appearance of AMD after operations ceased: (1) During the ...

Online chat

image

Heavy metals from acid mine drainage - impacts and ...

Heavy metals from acid mine drainage - impacts and modelling strategies ... penetrates the rock allowing the formation of iron sulphate salts which can be dissolved in groundwater. Contaminated groundwater contains dissolved iron salts and high levels ... applied to the acid mine discharges from …

Online chat

image

Microbiological factor in acid mine drainage formation ...

If you no longer have access with this institution, try logging in with your ACS ID. Type part of your institution name for a list of matches. If your institution is not listed, please contact your librarian. No institution has been found Unable to find the university or organization name. Please ...

Online chat

image

Formation of imines and enamines (video) | Khan Academy

Voiceover: Let's see how to form imines and enamines and start with the formation of an imine we start with an aldehyde or a ketone. And you add an amine to it and you need an acid catalyst and over here on the right if your Y is equal to hydrogen or an alkyl group which is a R double prime you will form an imine.

Online chat

image

Microbiology Chapter 21 Flashcards | Quizlet

26) The propagation cycle that occurs in acid mine drainage is caused by A) reduction of Fe3+ by sulfuric acid. B) the oxidation of sulfide to sulfuric acid by microbial oxidation of iron (Fe3+). C) microbial sulfate reduction. D) low pH and high oxygen concentrations.

Online chat

image

Acid Mine Drainage, Geomicrobiology, USGS Microbiology ...

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 …

Online chat

image

SECTION VI Chemical Aspects of Acid Formation (pyrrhotite ...

FORMATION AND TRANSPORT OF ACID MINE DRAINAGE Chemical Aspects of Acid Formation The sulfur-bearing minerals which predominate in coal seams are the iron sulfide ores pyrite, marcasite, amorphous 'sulfur-balls', and less commonly the monosulfide pyrrhotite. Excluding pyrrhotite, all have …

Online chat

image

Heavy metals from acid mine drainage - impacts and ...

Heavy metals from acid mine drainage - impacts and modelling strategies ... penetrates the rock allowing the formation of iron sulphate salts which can be dissolved in groundwater. Contaminated groundwater contains dissolved iron salts and high levels ... applied to the acid mine discharges from …

Online chat

image

A critical stage in the formation of acid mine drainage ...

4 Yang Zhao, Peng Chen, Wenbin Nan, Dejuan Zhi, Ronghui Liu, Hongyu Li, The use of (5Z)-4-bromo-5-(bromomethylene)-2(5H)-furanone for controlling acid mine drainage through the inhibition of Acidithiobacillus ferrooxidans biofilm formation, Bioresource Technology, 2015, 186, 52CrossRef

Online chat

image

Acid Rock Drainage - Courses and Live Webcasts - Edumine

Acid Rock Drainage - Courses and Live Webcasts. Online courses, short courses and live webcasts about Acid Rock Drainage for mining and geoscience from Edumine.

Online chat

image

US5550141A - Method for inhibiting the formation of acid ...

A method is described for inhibiting the production of acid mine drainage from the disposal of sulphide tailings and waste rock deposition during mining and milling of sulphide containing ores, which comprises adding to said sulphide tailings or waste rock deposition an effective amount of 2-mercapto-1-methyl imidazole or a 1,3,4-thiadiazole selected from the group consisting of 2,5-dimercapto ...

Online chat

image

How is Mine Drainage Formed?

The formation of acid in the reaction could lead to acid-base reactions if it is neutralized by limestone in the soil. ... Following Pyrite's Trail • How is Mine Drainage Formed? TEACHER'S ANSWER SHEET — MINE DRAINAGE FORMATION ACROSS 3. Places where coal is extracted 7. The form of sulfur …

Online chat

image

Acid Mine Drainage (AMD): causes, treatment and case ...

Acid Mine Drainage (AMD) is produced when sulfide-bearing material is exposed to oxygen and water. The production of AMD usually – but not exclusively – occurs in iron sulfide-aggregated rocks. Although this process occurs naturally, mining can promote AMD generation simply through increasing the …

Online chat

image

Evolution of Acid Mine Drainage Formation in Sulphidic ...

Sulphidic mine tailings are among the largest mining wastes on Earth and are prone to produce acid mine drainage (AMD). The formation of AMD is a sequence of complex biogeochemical and mineral dissolution processes. It can be classified in three main steps occurring from the operational phase of …

Online chat

image

Acid mine drainage - microbewiki

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 water.

Online chat

image

Imine - Wikipedia

An imine (/ ɪ ˈ m iː n / or / ˈ ɪ m ɪ n /) is a functional group or chemical compound containing a carbon–nitrogen double bond.The nitrogen atom can be attached to a hydrogen (H) or an organic group (R). If this group is not a hydrogen atom, then the compound can sometimes be referred to as a Schiff …

Online chat

image

The Whitehill Formation as a Potential Analogue to the ...

Abstract Acid mine drainage issues have been a cause for worldwide concern. This study assessed the potential of the Whitehill Formation as an analogue to the acid mine drainage issues in the Witwatersrand, South Africa. Evaluation of the Whitehill Formation suggests that the outcrop of gypsum in the formation

Online chat