نتایج جستجو برای: artisanal gold mine

تعداد نتایج: 107584  

Short-term production plans are the basis for operational mine production schedules. They concentrate on making long-term mine plans operationally feasible. Furthermore, some variables such as ore grade and tonnage govern mine production systems and cause uncertainty in the supply of raw materials to the mills. Due to the quality variation of material, short-term production optimization is an u...

2016
Stefan Doering Stephan Bose-O’Reilly Ursula Berger

BACKGROUND The continuous exposure to inorganic mercury vapour in artisanal small-scale gold mining (ASGM) areas leads to chronic health problems. It is therefore essential to have a quick, but reliable risk assessing tool to diagnose chronic inorganic mercury intoxication. This study re-evaluates the state-of-the-art toolkit to diagnose chronic inorganic mercury intoxication by analysing data ...

Journal: :Chemosphere 2014
Eduardo De Miguel Diana Clavijo Marcelo F Ortega Amaia Gómez

Colombia is one of the largest per capita mercury polluters in the world as a consequence of its artisanal gold mining activities. The severity of this problem in terms of potential health effects was evaluated by means of a probabilistic risk assessment carried out in the twelve departments (or provinces) in Colombia with the largest gold production. The two exposure pathways included in the r...

Journal: :Environmental Health Perspectives 1997
P Young

Background: Hematopoietic development in vertebrate embryos results from the sequential contribution of two pools of precursors independently generated. While intra-embryonic precursors harbour the features of hematopoietic stem cells (HSC), precursors formed earlier in the yolk sac (YS) display limited differentiation and self-renewal potentials. The mechanisms leading to the generation of the...

Journal: :Paste ... 2021

Mavres Petres mine is an underground mine, located in Chalkidiki, northern Greece, that owned and operated by Hellas Gold; a wholly subsidiary of Eldorado Gold Corporation. The extracts highgrade lead zinc orebody using drift fill mining method. Backfill integral part cycle at mine. Filtered coarse tailings mixed with cement are used for making cemented hydraulic backfill surface batching plant...

Journal: :International Journal of Environmental Research and Public Health 2015

Journal: :International Journal of Earth & Environmental Sciences 2016

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