Mercury-free, small-scale artisanal gold mining in Mozambique: utilization of magnets to isolate gold at clean tech mine

2012 ◽  
Vol 32 ◽  
pp. 88-95 ◽  
Author(s):  
Kevin Drace ◽  
Adam M. Kiefer ◽  
Marcello M. Veiga ◽  
Matt K. Williams ◽  
Benjamin Ascari ◽  
...  
Keyword(s):  
Gold Mining ◽  
Small Scale ◽  
Artisanal Gold Mining

Participatory Analysis of Small-Scale Artisanal Gold Mining in the Santa Rita District, Municipality of Andes, Antioquia, Based on the PAIIO Methodology

2020 ◽  
Author(s):  
María Paula Flórez Jiménez ◽  
Ángela María Plata ◽  
Andrés Acero ◽  
Luz Stella Gaona ◽  
Álex Smith Araque ◽  
...  
Keyword(s):  
Gold Mining ◽  
Small Scale ◽  
Artisanal Gold Mining ◽  
Participatory Analysis

Environmental Impact of Small-scale and Artisanal Gold Mining in Southern Ecuador

AMBIO ◽  
2000 ◽  
Vol 29 (8) ◽  
pp. 484-491 ◽  
Author(s):  
N. Håkan Tarras-Wahlberg ◽  
Adriana Flachier ◽  
Göran Fredriksson ◽  
Stuart Lane ◽  
Bo Lundberg ◽  
...  
Keyword(s):  
Environmental Impact ◽  
Gold Mining ◽  
Small Scale ◽  
Artisanal Gold Mining ◽  
Southern Ecuador

Pilot Assessment of Hazards and Health Effects in a Small-Scale Artisanal Gold Mining Community in Ghana

2014 ◽  
Vol 2014 (1) ◽  
pp. 1444
Author(s):  
Richard Neitzel* ◽  
Allyson Green ◽  
Mozhgon Rajaee ◽  
Rachel Long ◽  
Stephanie Sayler
Keyword(s):  
Health Effects ◽  
Gold Mining ◽  
Small Scale ◽  
Artisanal Gold Mining ◽  
Mining Community

scholarly journals The impact of artisanal gold mining, ore processing and mineralization on water quality in Marmato, Colombia

2021 ◽  
Author(s):  
Keith W. Torrance ◽  
Stewart D. Redwood ◽  
Alessandro Cecchi
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Gold Mining ◽  
World Health ◽  
Geochemical Data ◽  
Small Scale ◽  
Artisanal Mining ◽  
Artisanal Gold Mining ◽  
Ore Processing ◽  
The Impact

AbstractMarmato, Colombia, has been an important centre of gold mining since before the first Spanish colonizers arrived in 1536. The Marmato deposit is hosted in a dacite and andesite porphyry stock as sheeted sulphide-rich veinlet systems. The district is currently experiencing a surge in both major mining projects and artisanal mining, driven by sustained high gold prices. Ore from small-scale and artisanal gold mining is processed in numerous small mills (entables) around Marmato, which impact surface water quality through the discharge of milled waste rock slurry, highly alkaline cyanide-treated effluent, and high dissolved metal loads. To investigate the impact of artisanal mining and ore processing, water samples were collected in January 2012 from streams around Marmato. The average dissolved metal concentrations in impacted streams were Zn, 78 mg L−1; Pb, 0.43 mg L−1; Cu, 403 µg L−1 Cd, 255 µg L−1; As, 235 µg L−1; Ni, 67 µg L−1; Co, 55 µg L−1; Sb, 7 µg L−1; and Hg, 42 ng L−1, exceeding World Health Organization drinking water guidelines. In addition, arsenic speciation was conducted in-situ and indicated that 91–95% of inorganic arsenic species is in the form of As(V). Spatial analysis of the data suggests that entables processing ore for artisanal miners are the main contributor to water pollution, with high sediment loads, alkalinity and elevated concentrations of dissolved arsenic, cadmium, mercury and lead, caused by the processing of gold-bearing sulphides in the entables. Geochemical data from surface water were compared to a comprehensive data set of whole rock analyses from drill core and channel samples from the deposit, indicating that the deposit is significantly enriched in gold, silver, lead, zinc, arsenic, antimony, and cadmium compared to crustal averages, which is reflected in the surface water geochemistry. However, elevated mercury levels in surface water cannot be explained by enrichment of mercury in the deposit and strongly suggest that mercury is being added to concentrates during ore processing to amalgamate fine gold.

scholarly journals Lead Toxicoses in Free-Range Chickens in Artisanal Gold-Mining Communities, Zamfara, Nigeria

2020 ◽  
Vol 10 (26) ◽  
Author(s):  
Olusola O. Oladipo ◽  
Olatunde B. Akanbi ◽  
Pius S. Ekong ◽  
Chidiebere Uchendu ◽  
Oyetunji Ajani
Keyword(s):  
Body Weight ◽  
Human Health ◽  
Lead Poisoning ◽  
Gold Mining ◽  
Daily Intake ◽  
Field Investigation ◽  
Small Scale ◽  
Free Range ◽  
Artisanal Gold Mining ◽  
Animal Populations

Background. In early 2010, outbreaks of lead poisoning due to artisanal gold mining in villages in the northwest Nigerian state of Zamfara have resulted in the death of hundreds of children < 5 years old. There have also been unconfirmed reports of high mortality of geese within these villages. Objectives. To report a case of lead poisoning in three domestic free-range chickens found in one of the affected communities where illegal small-scale gold mining activities take place. Methods. Three free-range domestic chickens were presented during a field investigation in one of the villages. The birds were observed to be emaciated, weak, showing nervous manifestations and moribund. Results. Tissue extracts of liver, spleen and intestines were negative for Newcastle viral antigens, while cultures of liver and spleen biopsy were positive for Escherichia coli. Histopathological lesions were observed in the kidney, proventriculus and brain. Concentrations of lead in the tissues ranged between 7.5 mg/kg and 120.5 mg/kg wet weight, and the potential daily intake of lead in the tissues were estimated at 34.06–200.15 μg/day/kg body weight with an average of 118.37 μg/day/kg body weight. Conclusions. The results of the present study suggest probable risk to human health due to the consumption of chicken contaminated by lead in the affected villages. Poisoning in animal populations may serve as a sentinel to assess the extent of environmental contamination and human health problems related to lead. Ethics Approval. Protocols were approved and performed in accordance with relevant local guidelines and regulations as set by the Animal Care and Use Committee of the National Veterinary Research Institute, Vom, Nigeria. Competing Interests. The authors declare no competing financial interests.

Mercury Pollution and Artisanal Gold Mining in Alto Cauca, Colombia: Woman's Perception of Health and Environmental Impacts

2018 ◽  
Vol 27 (4) ◽  
pp. 415-444 ◽  
Author(s):  
Irene Vélez-Torres ◽  
Diana C. Vanegas ◽  
Eric S. McLamore ◽  
Diana Hurtado
Keyword(s):  
Analytical Chemistry ◽  
Social Action ◽  
Gold Mining ◽  
Closed Loop ◽  
Research Strategy ◽  
Small Scale ◽  
Transdisciplinary Approach ◽  
Chemistry Research ◽  
Artisanal Gold Mining ◽  
Perception Of Health

This article discusses the results of a pilot research strategy for monitoring environmental hazards derived from the use of mercury in artisanal gold mining in the Alto Cauca region, Colombia. During 2016 and 2017, a transdisciplinary approach was established to inquire on the health, environment, and territorial problems originated from artisanal mining. In this article, we specifically focus on how this particular issue affects women in the area. We establish a closed-loop approach for integrating social action research with analytical sciences/engineering to understand risks associated with Hg2+ levels in artisanal and small-scale gold mining in the Cauca department. We develop a platform known as closed-loop integration of social action and analytical chemistry research.

Knowledge and Awareness of Health Effects Related to the Use of Mercury in Small-Scale Artisanal Gold Mining in Suriname

2018 ◽  
Vol 2018 (1) ◽  
Author(s):  
Ilse Ottenbros ◽  
Romilda Boerleider ◽  
Bianca Jubitana ◽  
Nel Roeleveld ◽  
Paul T. Scheepers
Keyword(s):  
Health Effects ◽  
Gold Mining ◽  
Small Scale ◽  
Artisanal Gold Mining

scholarly journals Impacts of artisanal and small-scale gold mining on soils in northern regions of Côte d’Ivoire: cases of Boundiali, Korhogo and Tengrela

2021 ◽  
Vol 15 (3) ◽  
pp. 1234-1248
Author(s):  
Jean C. A. Beda ◽  
Jean-Marie P. Ouattara ◽  
Aman Messou ◽  
Lacina Coulibaly
Keyword(s):  
Cote D'ivoire ◽  
Contaminated Soils ◽  
Gold Mining ◽  
Côte D’Ivoire ◽  
Risk Index ◽  
Exchange Capacity ◽  
Small Scale ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Artisanal Gold Mining

The development artisanal and small-scale gold mining in recent years in Côte d'Ivoire could pose a risk to soils and health of local communities. This study aimed at assessing the impacts of artisanal and small-scale gold mining on the soils in the areas in the northen localities (Boundiali, Korhogo and Tengrela) of Côte d’Ivoire, where those activities are accentuated. Field observation and physico-chemical parameters analysis (potential hydrogen (pH), cation exchange capacity (CEC), organic matter (OM)) and pollutants (mercury (Hg), copper (Cu), zinc (Zn), arsenic (As) and cyanide (CN)) in soil samples were carried out. The results indicate that artisanal gold mining create soils erosion and consequently, soil structure destruction. Trace metals concentrations were 0.0001-0.0051 mg/kg (Hg), 0.002-0.32 mg/kg (CN), 18.90-73.10 mg/kg (Cu), 16.40-50.1 mg/kg (As) and 10.20-26.60 mg/kg (Zn). Geoaccumulation index (Igeo) in soils showed uncontamination for Hg and Zn, uncontamination to moderate contamination for Cu and moderate to strong contamination for As. According to ecological risk index (Eri), As could pose considerable to high risks to biota in study area. This study highlights serious risks to soil biota and human health, from artisanal gold mining activities. Thus, it is necessary to clean-up arsenic-contaminated soils.

scholarly journals The large footprint of small-scale artisanal gold mining in Ghana

2021 ◽  
pp. 146644
Author(s):  
Abigail Barenblitt ◽  
Amanda Payton ◽  
David Lagomasino ◽  
Lola Fatoyinbo ◽  
Kofi Asare ◽  
...  
Keyword(s):  
Gold Mining ◽  
Small Scale ◽  
Artisanal Gold Mining
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