reactions of mine tailing ponds

Mining Wastewater | liquideffluents

 · This book offers a more chemical approach to mine wastes such as mine water, tailings, cyanide and sulphuric mine wastes. Unregulated mining as well as modern regulations of mining are mentioned. If needed, the book provides the chemical reactions behind many of the processes occurring which produce the unwanted mining by-products.

Passive treatment for the removal of residual cyanide in ...

environmental friendly long-term methods for treating leachates from tailing ponds, wetland-based passive systems have been tested at the site of a gold mine in Spain. In this case study, most cyanide compounds are in the ''weak acid dissociable'' (WAD) form and, almost all of them as copper-cyanide. In

Tailings

Terminology. Tailings are also called mine dumps, culm dumps, slimes, tails, refuse, leach residue, slickens, or terra-cone (terrikon).. Examples Sulfide minerals. The effluent from the tailings from the mining of sulfidic minerals has been described as "the largest environmental liability of the mining industry". These tailings contain large amounts of pyrite (FeS 2) and Iron(II) sulfide (FeS ...

Tailings Ponds 101 | Oil Sands Magazine

 · TAILINGS PONDS 101. Tailings ponds (or tailings storage facilities) play a critical role in storing solids from mined oil sands and managing water flows. These ponds are massive earth structures, initially constructed from overburden hauled from the mine site. Tailings ponds are normally located in a part of the lease that has little or no bitumen.

Mine Waste Transfer and Disposal Methods

With the latest technology, the Dredge Sled is a cost-effective solution for your pond, lagoon, canal, mine tailings pond, and settling tank cleaning. The Dredge Sled is a simple, efficient, and easy-to-use alternative compared to more complicated heavy-duty dredging equipment. The best solution for shallow pond or lagoon dredging.

Long-term performance of reclaimed tailings ponds at HVC ...

Figure 4.4-2: Filamentous algae bloom at Highmont tailings pond Figure 4.4-3: pH in Highmont tailings pond by month, 2000-2016 The filamentous green taxa involved in the blooms were variable and included Cladophora, Spirogyra, Mougeotia and Stigeoclonium. Filaments of …

White Pine Mine tailings pond disappearing, still ...

 · While it comes as a surprise to some, the state of Michigan still requires the registration and inspection of the human-made tailings ponds at the White Pine Mine. This makes the Tailings Pond No. 2 dam the longest in Copper Country. It is 5.5 miles long, and ranges in …

Brazil mine accident puts tailings ponds safety back in ...

 · Up until November 5, the August 4, 2014, tailings pond failure at Imperial''s Mount Polley copper mine had been the worst such breach at a mine in recent years.

MINING RECLAMATION IN NORTH AMERICA

About a century ago, the Climax mine first began mining and milling molybdenite ore. The mine, located at an altitude of roughly 10,000 feet in the Colorado Rockies, has produced substantial amounts of ore and continues operating today. 4 Robinson Tailings Pond and surrounding area in 1998 before placement of biosolids to aid in vegetation growth.

Mine tailing disposal sites: contamination problems ...

 · Unfortunately, the electrokinetic treatment of mine tailings was only able to remove a small fraction of the metals, so there is a risk of mobilization of the residual fraction in the future due to the slow but continuous transformation of the minerals in the mine dump, due to chemical reactions with atmospheric oxygen and biological induced ...

Influence of Hydrofluoric Acid Leaching and Roasting on ...

 · Sulfidic Mine Tailings Babak Koohestani 1,*, Ahmad Khodadadi Darban 2, ... a considerable amount of pyrite can be produced and transferred to the tailings ponds disposal [2,9]. Under the oxidative condition in the presence of oxygen and moisture, pyrite oxidizes ... exothermic-endothermic reactions during the pyrite''s roasting, some ...

Risk and the mining industry after the Brumadinho tailings ...

Risk and the mining industry after the Brumadinho tailings dam failure. On the 25th of January, a tailings dam at Vale''s Corrego de Feijao mine burst. A wave of mud, iron ore and toxic chemicals was released into the valley below the dam, killing at least 206 people. It …

Bacterial Reduction of Selenium in Coal Mine Tailings Pond ...

Abstract and Figures. Sediment from a storage facility for coal tailings solids was assessed for its capacity to reduce selenium (Se) by native bacterial community. One Se (6+)-reducing bacterium ...

(PDF) Reclamation of Mine Tailings

 · Abandoned mine tailings from a wide variety of industries are found around the world. ... Chemicals reaching tailings ponds may undergo further reaction over an …

Mine Tailings Dredging

Tailing Ponds. Mining operations produce large volumes of waste and debris referred as "tailings" that end up at the bottom of containment ponds and lagoons. We offer specialty dredging equipment and services designed to desilt and desludging a range of slime ponds, tailings lagoons, and contained waterways at mine sites.

Environmental Risks From Mine Tailings

 · Tailing ponds can be hundreds of acres in size, and in those cases, leaks into surface and ground waters are probably inevitable. The heavy metals, acids, and other contaminants end up …

An Evaluation of Tailings Ponds Sealants

2. Research should be conducted to determine the movement of mining and milling waste pollutants through the soil and groundwater surrounding tailings ponds. The information would be beneficial in planning more efficient seepage detection systems, and defining the magnitude of seepage resulting from mine tailings ponds. 3.

Mining Peru''s Cerro de Pasco

 · Several tailings ponds are visible southwest of the city; the colorful Quiulacocha tailings pond is one of the most noticeable. Though new tailings have not been added since 1992, it appears reddish-brown because acidic water seeps in from a waste rock …

"Managing Thiosalts at Xstrata Copper

• Kidd Mine and Kidd Concentrator • Copper/zinc mined since 1966 • Production reached 9,200 feet (2,800m) in 2009, making the ... tailings discharge started in 1966 • Thickened tailings discharge since 1973 • Lime Treatment at Pond ... • During oxidation reactions, proton (H+) is produced. ...

Costs of Remediation at Mine Sites,

----- Costs of Remediation TABLE OF CONTENTS 1.0 INTRODUCTION 1 1.1 Cost Factors 1 1.2 Organization of Report 3 2.0 ACID ROCK DRAINAGE 4 2.1 Waste Rock Pile 5 2.2 Underground Mine Drainage 10 3.0 SEEPAGE AND OVERFLOW FROM LEACH SYSTEMS AND TAILINGS IMPOUNDMENTS 13 3.1 Overflow or Breach of an Impoundment Structure 13 3.2 Leakage from the Face or Toe of a Dam 14 4.0 MINE …

Reclamation of Tailings Pond 1

 · Suncor employees share their experiences and the process for reclaiming Pond 1, Suncor''s first tailings pond. Learn more about our tailings pond management a...

Application of GETFLOWS Coupled with Chemical Reactions …

 · western end of the pond. The depth of the Yotsugi mill tailings pond in summer and winter was 1.4 m and 1.2 m at point H, respectively. This decreased towards the upstream area of the Yotsugi mill tailing pond from point H to A. The depth at point A was 0.0 m. Figure 1. Inlet points of acid mine drainage in the Yotsugi mill tailings pond.

Tailings

Monitoring of mine tailings using satellite and lidar data

Tailings Pond

The two tailings ponds contain a total of 20.3 million tons of tailings (Fig. 9.9 a), their average uranium concentration being 67 g/t. Because the barren process solutions were neutralised only to pH 7–8 (instead of shifting pH to 10.5–11) during the milling process, the TDS content exceeds 20 g/l in the liquid phase of the tailings.The tailings ponds were built without any proper base ...

Leaching of heavy metals from Dexing copper mine tailings pond

Abstract. The wastewater source of 4# tailing pond in Dexing copper mine consists of alkaline flotation pulp and acid mine drainage (AMD) from the nearby opencast mine. Therefore, the heavy metals in tailing ore are very likely to be released due to acidification from AMD. The leaching behaviors of Zn, Cu, Fe and Mn in mine tailings from Dexing ...

Kinetics of Pyrite Oxidation in Simulated Mine Tailings ...

Kinetics of Pyrite Oxidation in Simulated Mine Tailings Pond Conditions Geoffrey Ray L. Nablo University of the Philippines, Diliman, Quezon City, Philippines Abstract Pyrite oxidation is the predominant source of acid mine drainage (AMD), which is …

New Tailings Reprocessing Technology Has Environmental ...

 · New Tailings Reprocessing Technology Has Environmental Benefits. Tailings, mineral waste products produced by mining operations, are a well-known pollutant requiring remediation. Tailings may be dumped in or near water or transported by wind or water to contaminate the surrounding area. Mine sites typically manage tailings by constructing ponds ...

Technical Report: Design and Evaluation of Tailings Dams ...

tailings in impoundments or free-standing piles, backfilling underground mine workings and open-pits, subaqueous disposal, and the most common method, the disposal of tailings slurry in impoundments. Modern tailings impoundments are engineered structures for permanently disposing of the fine-grained waste from mining and milling operations.

CHEVRON QUESTA MINE EPA REGION 6

tailing facility is located in the Rio Grande rift basin. The mine and tailings ponds are bounded to the south by the Red River, a tributary of the Rio Grande. The Red River is home to a State fish hatchery located 2 miles downstream of the tailings ponds and is designated as a Wild and Scenic River in the vicinity of its confluence with the Rio

Treatment of copper mine tailings using a y, A^M

generated in the reaction to escape and to insure that the reactants are well mixed. Once the sulfides have been oxidized, sulfuric acid is added to solubilize the copper present in the tailings as oxide precipitates. The result of the reactions is copper sulfate as shown in the reaction (7). Copper: Cu(OH)z + HzSO, 4 Cu^ + SO^~ + 2 %() (7)

Arsenic Transport in Contaminated Mine Tailings following ...

 · Two low pH samples (pond tailings and reprocessed tailings) were chosen for more detailed chemical characterization and unsaturated column transport experiments before and after . Soluble As concentrations measured in column effluent increased by factors of 10 (reprocessed tailings, RT) to 400 (pond tailings, PT) following .

Long-term Risk of Tailings Dam Failure (U.S. National Park ...

Figure 5. Bingham Canyon Mine tailings pond. EcoFlight. Second, while water supply dams are all of the down-stream-type construction, the construction of tailings dam can be either (1) downstream, (2) centerline, (3) upstream, or (4) a combination of any of the previous methods.

This is Giant Mine

 · The final two tailings ponds at Giant Mine. The alarming red colour is actually due to an iron-based chemical, ferric sulphate, used to pull arsenic trioxide out of the tailings before the water is pumped into the "polishing pond" to the right. That is the final stage before the …

Canadian Natural Resources

The CO 2 is added into the tailings stream before it enters the pond, where it creates a chemical reaction that changes the tailings water pH to be the same as river water. This reaction allows the solids (fines) to settle more quickly and for the quick release of …

The Feasibility of Lining Tailings Ponds

some cases multiple tailings ponds were developed on a single mine site. The size of tailings ponds in the copper sector appeared to be significantly larger than average. The site visits also noted that most tailings ponds used some form of barrier on the bottom and sides of tailings ponds to retard flow of water through the bottom.

From Tailings to Treasure? Miners Make Money Reprocessing ...

 · Mine sites typically manage tailings by constructing ponds secured by dams. According to the web site miningfacts , another strategy is to produce thickened tailings, which are pressed or have chemicals added to remove excess water. Thickened tailings can be mixed with cement and used in construction or as backfill in underground mines ...

Tailings ponds: What they''re made of

 · Tailings ponds attract a lot of attention because there is currently about 77 square kilometres of oil sands tailings pond water in Alberta, according to the Government of Alberta. So while most people have heard of tailings ponds and seen photos, few know what purpose they serve and what the ponds actually contain.

Monitoring of mine tailings using satellite and lidar data

A tailings pond is an area of refused mining tailings where the water borne material is pumped into a pond to allow for the sedimentation of the solid particles. The dangers associated with tailing ponds include dam failure and acid mine drainage from seepages.

Developing tailings ponds and pit lakes as bioreactors and ...

These reactions are summarized in Figure 1, which also demonstrates the sharp decline in diffusion of aqueous metals within a substrate and the consequent anoxic conditions 0.5 mm beneath an organic layer (McKee et al., Sediment Surface in HVC Tailings Ponds Figure 1: Oxic/Anoxic Layers and Reactions at the 2002).

Ferric salts reduce arsenic in mine effluent by combining ...

 · The tailing pond of a mine site provides storage capacity for all process effluents and site run-off. In many cases, the tailing pond supernatant is recycled back to the plant for reuse as process water to minimize fresh water consumption. Over time, untreated effluent in ponds generally acidifies and leaches metals.