نتایج جستجو برای: copper mining

تعداد نتایج: 168443  

Journal: :Global Environmental Change-human and Policy Dimensions 2021

Mining activities induce profound changes to societies and the environment they inhabit. With global extraction of metal ores doubling over past two decades, pressures related mining have dramatically increased. In this paper, we explore where growing has particularly taken effect. Using fine-grain data, investigate spatial temporal distribution nine (bauxite, copper, gold, iron, lead, manganes...

2008
John D. Walters

The primary objectives of my funded research were two fold in construct and dealt with systems of management on both an industrial and individual level. The first was to examine the environmental and socio-economic burdens of resource management in relation to copper ore extraction in Chile, the world’s largest copper producer. Secondly, I visited a unique detoxification program at the Thamkrab...

2004

Consideration of the mining method is an essential component of ore reserves evaluation. This is particularly true where the profitability of a project is conditioned by the ability to mine selectively. Linear estimation methods such as Ordinary and Simple Kriging commonly fail to provide unbiased estimates of recovered ore tonnage and metal content which means that a mining project can be expo...

2015
Rodrigo Rodriguez-Fernandez Ekowati Rahajeng Francesca Viliani Haripurnomo Kushadiwijaya Rachel M Amiya Michael J Bangs

OBJECTIVES Non-communicable diseases (NCDs) constitute an increasing slice of the global burden of disease, with the South-East Asia region projected to see the highest increase in NCD-related deaths over the next decade. Mining industry employees may be exposed to various factors potentially elevating their NCD risk. This study aimed to assess the distribution and 5-year longitudinal trends of...

Journal: :Acta Chimica Asiana 2023

Freeport Indonesia is one of Freeport-McMoRan Copper & Gold Inc. affiliate companies. conducted a series mining and exploration processes for ore containing gold, silver, copper. Grasberg the location in PT Freeport, Indonesia. This research aimed to determine distribution gold (Au) particles rock samples with relatively high content. The method used analyzing content was Fire Assay. result...

Journal: :Environmental toxicology and chemistry 2010
Juan P Pavissich Macarena Silva Bernardo González

Sulfate-reducing bacterial communities from coastal sediments with a long-term exposure to copper (Cu)-mining residues were studied in lactate enrichments. The toxicity of excess copper may affect sulfate-reducing bacterial communities. Sulfate reduction was monitored by sulfate and organic acid measurements. Molecular diversity was analyzed by 16S rRNA, dissimilatory sulfate reduction dsrAB, a...

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