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decommissioned tailings dams in ghana

decommissioned tailings dams in ghana

decommissioned tailings dams in ghana 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

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LEVELS OF HEAVY METALS AND CONTAMINATION STATUS

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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Trace elements contamination of soils around gold mine

Levels of As, Cu, Pb and Zn in soils around active and decommissioned gold mine tailings dams at Obuasi, Ghana (mg/kg). Trace element Tailings dam sites Total count Mean SE mean St.Dev Min. Median Max. Range As Active 9 581 130 389 178 493 1473 1295 Decommissioned 9

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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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Distribution of Arsenic and Heavy Metals from Mine

Municipality of Ghana. One active (Sanso tailings dam) and two abandoned (Pompora and Dokyiwa) mine tailings dams in Obuasi gold mine site, were selected for the collection and analysis of the tailings. The concentrations of As, Fe, Mn, Cu and Zn were determined using an atomic absorption spectrometer (AAS, Varian Models 240FS).

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Levels of heavy metals and contamination status of a

Heavy metal pollution from tailings has become a major global concern due to its toxicity, persistence and accumulative potential with its detrimental effects on public health and environmental receptors. In a bid to determine the contamination status of a decommissioned Tailings Storage Facility (TSF 2) from Chirano Gold Mine limited (CGML), scoop of mine tailings were collected down to a

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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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Distribution of Arsenic and Heavy Metals from Mine

Municipality of Ghana. One active (Sanso tailings dam) and two abandoned (Pompora and Dokyiwa) mine tailings dams in Obuasi gold mine site, were selected for the collection and analysis of the tailings. The concentrations of As, Fe, Mn, Cu and Zn were determined using an atomic absorption spectrometer (AAS, Varian Models 240FS).

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Johnson MANU Professor (Associate) University of Ghana

The aim was to outline effective remediation strategy for As, hence the objectives were to establish: (1) Arsenic degradation capacity of the decommissioned tailings dam environment and empirical

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Simon GAWU PhD Kwame Nkrumah University Of Science

The aim was to outline effective remediation strategy for As, hence the objectives were to establish: (1) Arsenic degradation capacity of the decommissioned tailings dam environment and empirical

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Manual 019: Decommissioning, Closure, and Abandonment

decommissioning plan unless the dam owner’s qualified professional indicates one should be prepared and submitted. Refer to section 9.6 of the directive for decommissioning of low-consequence dams. 3 Risk Management for Tailings Dams in Closure and Abandonment

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Vale continues tailings dam decommissioning Mining Magazine

Vale continues tailings dam decommissioning Brazil iron ore major Vale expects to book US$671 million in net new provisions related to its tailings dam decommissioning programme when it reports full-year 2019 and December-quarter financial results next week Vale gives update on dam 'decharacterisation' work

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Progresses in restoration of post-mining landscape in

Mar 19, 2018· 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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Technical Report: Design and Evaluation of Tailings Dams

Design, and Analysis of Tailings Dams (BiTech Publishers Ltd. 1990). This is particularly true of certain concepts and organizational emphases, as well as many of the tables and figures. In some cases, this document presents a digest of Vick's overall approach to tailings dam planning and design.

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Vale announces the decommissioning of all its upstream

Jan 29, 2019· Vale announces the decommissioning of all its upstream tailings dams Page Content Rio de Janeiro, January 29th, 2019 Vale S.A. (“Vale”) informs that it has presented to the Brazilian authorities its plan to decommission all its dams built by the upstream method.

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DECOMMISSIONING AND RECLAMATION OF THE SANTO

Tailings, dam, cover system, revegetation, future land use, long term stability. INTRODUCTION AND SITE CHARACTERIZATION This paper presents the conceptual plan for decommissioning and reclamation of the Santo Antônio Tailings Dam located at Morro do Ouro Mine owned by Kinross in the Municipality of Paracatu, Minas Gerais, Brazil.

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Aging dams are 'ticking time bombs'

Feb 09, 2021· Africa has far fewer large dams than other continents, though there are notable structures like the Akosombo Dam in Ghana, Kariba Dam in Zambia and Zimbabwe, and Egypt's Aswan Dam. While Africa increasingly relies on hydropower, the average age of Africa's dams

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NGOs and experts call for new guidelines for mine tailings

Jul 02, 2020· NGOs and experts call for new guidelines for mine tailings dams Photo: Rogério Alves/TV Senado Coming on the heels of a deadly and environmentally destructive tailings dam collapse in Brazil in 2019,more than 140 NGOs and experts are calling for critical new operating guidelines.

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Tailings dam Wikipedia

Tailings dams rank among the largest engineered structures on earth. The Syncrude Mildred Lake Tailings Dyke in Alberta, Canada, is an embankment dam about 18 kilometres (11 mi) long and from 40 to 88 metres (131 to 289 ft) high. It is the largest dam structure on earth by volume, and as of 2001 it was believed to be the largest earth structure

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LEVELS OF HEAVY METALS AND CONTAMINATION STATUS

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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