Acid Mine Formation

(PDF) Acid mine drainage formation, control and treatment

Acid mine drainage formation, control and treatment: Approaches and strategies. Download. Acid mine drainage formation, control and treatment: Approaches and strategies. Jeff Skousen. Related Papers. Acid Mine Drainage Control and Treatment. By Jeffrey Skousen. 17 Passive Systems Skousen MWEN.pdf.

Formation of acid mine drainage Acid mine drainage (AMD) forms when sulfide minerals in rocks are exposed to oxidizing conditions in coal and metal mining, highway construction, and other large-scale excavations. There are many types of sulfide minerals, but the iron sulfides, pyrite and maracasite (FeS 2), common in coal regions are the predominant AMD producers.

Abstract Acid mine drainage (AMD) occurs after mining exposes metal sulfides to oxidizing conditions. Leaching of reaction products into surface waters pollute over 20,000 km of streams in the USA alone. The coal mine permitting process requires prediction of AMD potential via overburden analysis. Where a potential exists, AMD control measures including spoil handling plans, alkaline amendment

Acid mine drainage formation, control and treatment

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

Schwertmannite formation and transformation, key processes that influence the speciation, mobility, and environmental fate of associated trace elements in acid mine drainage (AMD), were primarily studied through Fe2+ oxidation–hydrolysis. Direct Fe3+ hydrolysis is another important schwertmannite formation p Environmental fate of nanomaterials

Alkalinity Capability of water to neutralize acid Important to aquatic life Buffers against rapid pH change Often related to hardness Hardness is the concentration of divalent cations (e.g., Ca2+, Mg2+) Water-quality criteria for some metals are hardness-dependent In mining impacted systems, Ca2+, Mg2+, etc. can originate from the weathering of a variety of minerals

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 common bacteria[1]. The acidic water formed by this process can dissolve many metals in bioavailable

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

Evolution of Acid Mine Drainage Formation in Sulphidic

Chemistry of Acid Mine Drainage Formation

Download Citation | On Jan 4, 2021, Geoffrey S. Simate published Chemistry of Acid Mine Drainage Formation | Find, read and cite all the research you need on ResearchGate

Acid mine drainage (AMD) is the runoff produced when water comes in contact with exposed rocks containing sulfur-bearing minerals that react with water and air to form sulfuric acid and dissolved iron. This acidic run-off dissolves heavy metals including copper, lead, and mercury which pollute ground and surface water.

Mine drainage forms from a chemical reaction between water and rocks containing sulfur-bearing minerals. The resulting waters become rich in sulfuric acid and dissolved iron. As the iron settles out of the water, it can form red, orange, or yellow sediments in the bottom of streams.

This chapter unpacks and broadens the understanding of the acid mine drainage (AMD) challenge. The chapter defines and describes the origin and chemistry of the complex formation processes of AMD

The basic EIA steps include screening, scoping, impact prediction and evaluation, mitigation and follow-up studies for implemented projects to provide feedback (Noble, 2011; Castilla- Gomez and Herrera-Herbert, 2015). The potential for acid mine drainage (AMD) to form at mine sites is one of the key questions to be answered in an EIA process.

Prediction of Acid Mine Drainage Formation - Acid Mine

Acid mine drainage (AMD) formation and toxic arsenic (As) contamination are serious environmental problems encountered worldwide. In this study, we investigated the crucial roles played by common secondary mineral phases formed during the natural weathering of pyrite-bearing wastes-soluble salts (melanterite, FeSO 4 7H 2 O) and metal oxides (hematite, Fe 2 O 3)-on AMD formation and As

Jul 05, 2019 The formation of acid mine drainage (AMD), which results from the oxidation of sulfur minerals by air and water, can be accelerated by acidophilic and chemolithotrophic bacteria such as Acidithiobacillus ferrooxidans.Our previous study revealed that walnut shell powder and its phenolic component inhibit the growth of A. ferrooxidans.However, their inhibitory effect on AMD formation in the

Although the basic processes of acid mine drainage formation are universal, the importance of any single controlling factor is frequently specific to minesite conditions. Prediction of AMD Prediction of acid generation based on geochemical analysis has been practiced for about 25 years. The

A review: Pyrite oxidation mechanisms and acid mine

Jan 09, 2009 This acid drainage, commonly referred to as acid mine drainage (AMD), has become an economic and environmental burden. This review deals with abiotic/biotic modes of pyrite oxidation and the mechanistic involvement of OH ‐ , O 2 , and Fe 3+ in the pyrite oxidation process in low/high pH environments.

Schwertmannite formation and transformation, key processes that influence the speciation, mobility, and environmental fate of associated trace elements in acid mine drainage (AMD), were primarily studied through Fe2+ oxidation–hydrolysis. Direct Fe3+ hydrolysis is another important schwertmannite formation p Environmental fate of nanomaterials

Formation and transformation of schwertmannite through

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

Jul 01, 2003 A critical stage in the formation of acid mine drainage: Colonization of pyrite by Acidithiobacillus ferrooxidans under pH-neutral conditions Randall E. Mielke, Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011-5640, USA .

Acid mine drainage formation, control and treatment: Approaches and strategies. Download. Acid mine drainage formation, control and treatment: Approaches and strategies. Jeff Skousen. Related Papers. Acid Mine Drainage Control and Treatment. By Jeffrey Skousen. 17 Passive Systems Skousen MWEN.pdf.

Jeffrey G. Skousen, Paul F. Ziemkiewicz, Louis M. McDonald Acid mine drainage formation, control and treatment: Approaches and strategies, The Extractive Industries and Society 6, no.1 1 (Jan 2019): 241–249.

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

(PDF) Evolution of Acid Mine Drainage Formation in

Mine drainage forms from a chemical reaction between water and rocks containing sulfur-bearing minerals. The resulting waters become rich in sulfuric acid and dissolved iron. As the iron settles out of the water, it can form red, orange, or yellow sediments in the bottom of streams.