decommissioned tailings dams in ghana

decommissioned tailings dams in ghana

(PDF) Trace elements contamination of soils around

Levels of As, Cu, Pb and Zn in soils around active and decommissioned gold mine tailings dams at Obuasi, Ghana (mg/kg). Soil profile of Obuasi (Bowell, 1991) (Profile not drawn to scale).

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LEVELS OF HEAVY METALS AND CONTAMINATION

EQA – Environmental quality / Qualité de l’Environnement / Qualità ambientale, 35 (2019) 33-50 DOI: 10.6092/issn.2281-4485/9060 33 LEVELS OF HEAVY METALS AND CONTAMINATION STATUS OF A DECOMMISSIONED TAILINGS DAM IN GHANA Emmanuel Sey (1)*, Ebenezer J.D. Belford (2) (1) Department of Materials Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana

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Research Article Arsenic Sorption Characteristics in ...

Science and Technology, Kumasi, Ghana 2Department of Earth Science, University of Ghana, Legon-Accra, Ghana Abstract: Arsenic (As) sorption characteristics in decommissioned tailings dam environment at the Obuasi mine, Ghana was studied. The aim was to outline effective remediation strategy for As, hence the objectives were to

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Trace elements contamination of soils around gold mine ...

This study investigated the issue of tailings dams as a potential source of trace elements contamination in soils at the Obuasi gold mine in Ghana. Soil samples taken from depths of up to 12 cm and within a radius of 400 m from the tailings dams (active and decommissioned), were analysed for As, Cu, Pb and Zn using atomic absorption spectrometry.

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Old Gold Tailings Ghana - aquacristal

Old Gold Tailings Ghana . ... In a bid to determine the contamination status of a decommissioned Tailings Storage Facility (TSF 2) from Chirano Gold Mine limited (DXNL), scoop of mine tailings were collected down to a depth of 20 cm from nine sampling sites within a 8100 m 2 grid.

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Tailing dams and water: proposals for reducing risks by ...

tailings dam collapse, 19 people killed • Brumadinho (Brazil, 2019) - catastrophic decommissioned tailings dam collapse, c.270 people killed • World Information Service on Energy maintains (incomplete) list of tailings dam failures –110 events since 1960. 3

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Tailings Dams: What You Need To Know - ProjectsIQ

2020-11-3  Tailings dams are used to store water and waste that come as by products from the mining process. Tailings dams can be massive – the size of a lake reaching up to 300 metres high. As the slurry of waste is piped into the dam, the solids settle to the bottom and the water is recycled to be used in the separation process again.

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Closure of tailings dams - Australian Centre for

Unless fully decommissioned or removed, tailings dams must remain stable and serve their intended function to safeguard the environment over the long term. The long service life of closed tailings dams merits careful consideration in design for closure. This paper provides an overview of some typical closure work components for tailings dams.

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Tailings Dam Failure - WaterLegacy

The PolyMet tailings dam uses “upstream” construction, which is the cheapest, but riskiest, way to build a tailings dam. Most of the serious dam failures in recent decades have been associated with “upstream” dams, including several that were built or approved by the same consultants and methods used to plan PolyMet’s tailings

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World Mine Tailings Failures—from 1915 – supporting

STATE OF WORLD MINE TAILINGS PORTFOLIO 2020. INCREASING RISK FAILURE SEVERITY FOR COMMUNITIES INVESTORS WITHOUT MAJOR SUPPLY SIDE REFORMS NOT DELIVERED BY AS ANNOUNCED GTR, NGO OR GOVERNMENT INITIATIVES . The world’s 29,000-35,000 existing active, inactive and abandoned tailings storage facilities (TSF) contain approximately 223 billion

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Trace elements contamination of soils around gold

This study investigated the issue of tailings dams as a potential source of trace elements contamination in soils at the Obuasi gold mine in Ghana. Soil samples taken from depths of up to 12 cm and within a radius of 400 m from the tailings dams (active and decommissioned), were analysed for As, Cu, Pb and Zn using atomic absorption spectrometry.

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Distribution of Arsenic and Heavy Metals from Mine ...

2013-5-24  Distribution of Arsenic and Heavy Metals from Mine Tailings dams at Obuasi Municipality of Ghana Crentsil Kofi Bempah*1,6, Anthony Ewusi2, Solomon Obiri-Yeboah1, Stephen Boahen Asabere4, Francis Mensah3, Juliana Boateng5, Hans-Jürgen Voigt1 1Faculty of Environmental Sciences and Process Engineering, Chair of Environmental Geology Erich -Weinert

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Tailings facilities and dam failure. A risk and insurance ...

Dams are normally constructed from the coarse (sandy) fraction of tailings, which makes them relatively cheap to build, but potentially inherently weak and susceptible to seepage. Unlike a conventional water reservoir, where the dam is built as a complete structure in one go, tailings dams are built in stages using an initial starter dyke ...

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BHP calls for body to oversee tailings dams –

Olympic Dam is a multi-mineral ore body containing uranium oxide, copper, gold and silver. Source BHP. BHP Billiton Ltd. [BHP-NYSE; BHPLF-OTCPK] CEO Andrew Mackenzie is urging the global mining industry to ensure there is no repeat of the recent collapse of a tailings dam at Vale SA’s [VALE-NYSE], Brumadinho iron ore operation in Brazil. The Brumadinho dam breach, which occurred on Friday ...

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Guidance Note on the Tax Treatment of

2016-10-12  Tailings dams left to evaporate, then covered with waste rock, clay and soil, to stabilize it. The nature of the above activities can, depending on the nature of the mine, require

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Biological traits of tropical trees suitable for ...

2019-11-1  Biological traits of trees colonizing copper tailings dams in Zambia were studied. • Tailings dams were naturally colonized by different species compared to the Miombo. • Fast growth, tolerance to copper, N-fixing ability, mycorrhizal symbiosis. • The majority of the species accumulated less copper in the above-ground biomass.

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Progresses in restoration of post-mining landscape in ...

2018-3-19  Mining alters the natural landscape and discharges large volumes of wastes that pose serious pollution hazards to the environment, to human health and to agriculture. As a result, the recent 2 decades have witnessed a global surge in research on post-mining landscape restoration, yielding a suite of techniques including physical, chemical, biological (also known as phytoremediation) and ...

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Mine Tailings Management - Posts Facebook

Mine Tailings Management. 1.7K likes. Tailings Dams, Tailings Impoundment facility, Tailings storage facility TSF, Tailings Disposal, Thickened tailings disposal on surface and as mine backfill, High...

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Contamination by trace elements of agricultural soils ...

This study was carried out for the purpose of investigating the issue of tailings dams as a potential source of contamination by trace elements in soils at the Sidi Bou Othmane mine in the Marrakech Region, Morocco. Soil samples taken from depths of up to 15 cm and within a radius of 50 m from the tailings dams, were analyzed for Cd, Cu, Pb and Zn using atomic absorption spectrometry.

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H0256170.pdf Arsenic Mining - Scribd

2016-7-1  The low levels of As and trace metals observed in the active tailings dam might be as a result of the active tailings dams, being relatively recent (built in 1991), have benefited from substantial technological improvement over the decommissioned one, which was one of the earliest to be operated at the AngloGold Ashanti mines.

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African Journal of Environmental Science and

This study investigated the issue of tailings dams as a potential source of trace elements contamination in soils at the Obuasi gold mine in Ghana. Soil samples taken from depths of up to 12 cm and within a radius of 400 m from the tailings dams (active and decommissioned), were analysed for As, Cu, Pb and Zn using atomic absorption spectrometry.

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Investigation of the environmental impacts of naturally ...

1 Ghana Atomic Energy Commission, PO Box LG 80, Legon, Accra, Ghana ... ore dust during sample preparation, tailings dams, run-off from tailings and the soils of the ... The tailingswere collectedfrom a decommissioned. Gamma spectrometry study of environmental impacts of natural radionuclides in processing ores for gold 341

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Gold Tailings Retreatment UN SDGs Mining News

2020-11-19  Tailings retreatment is the Group’s biggest recycling contribution. Through reprocessing waste rock and tailings to remove gold left behind after the initial mining process, they reduce environmental impact while maintaining tailings dams.

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Biological traits of tropical trees suitable for ...

2019-11-1  Biological traits of trees colonizing copper tailings dams in Zambia were studied. • Tailings dams were naturally colonized by different species compared to the Miombo. • Fast growth, tolerance to copper, N-fixing ability, mycorrhizal symbiosis. • The majority of the species accumulated less copper in the above-ground biomass.

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Guidance Note on the Tax Treatment of

2016-10-12  Tailings dams left to evaporate, then covered with waste rock, clay and soil, to stabilize it. The nature of the above activities can, depending on the nature of the mine, require

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Contamination by trace elements of agricultural soils ...

This study was carried out for the purpose of investigating the issue of tailings dams as a potential source of contamination by trace elements in soils at the Sidi Bou Othmane mine in the Marrakech Region, Morocco. Soil samples taken from depths of up to 15 cm and within a radius of 50 m from the tailings dams, were analyzed for Cd, Cu, Pb and Zn using atomic absorption spectrometry.

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Reducing the Long Term Risk and Enhancing the

Author: A. Adams, C. Hall, K. Brouwer Conference: 87th Annual Meeting of the International Commission on Large Dams Date: June 9-14, 2019 ABSTRACT Tailings impoundments typically provide long-term storage for saturated, semi-fluid fine grained materials. Closure of these tailings impoundments represents an ongoing priority and challenge for owners and professionals due to the potential for the ...

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Mine Tailings Management - Posts Facebook

Mine Tailings Management. 1.7K likes. Tailings Dams, Tailings Impoundment facility, Tailings storage facility TSF, Tailings Disposal, Thickened tailings disposal on surface and as mine backfill, High...

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H0256170.pdf Arsenic Mining - Scribd

2016-7-1  The low levels of As and trace metals observed in the active tailings dam might be as a result of the active tailings dams, being relatively recent (built in 1991), have benefited from substantial technological improvement over the decommissioned one, which was one of the earliest to be operated at the AngloGold Ashanti mines.

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New Uranium Mining Projects - South Africa

2020-7-31  The facility is to receive the tailings from 15 existing tailings dams. (Beeld April 11, 2008) Uranium resource in West Rand tailings doubled : On July 4, 2007, Mintails Ltd announced that the total resource has been doubled to approx. 21 million lbs U3O8 [8,077 t U], 3.5 million lbs [1,346 t U] of which have been upgraded from the "inferred ...

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