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Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 CONT

Modern heap leach pads are large engineered structures, lined with an impermeable layer of plastic (referred to as a geosynthetic membrane) and placed over a prepared surface that is typically a compacted soil layer. Ore is placed (heaped) on the lined pad and treated with chemicals to dissolve (leach) a metal of interest while protecting the environment. The plastic liner placed at the bottom and around the sides of the pad prevents chemicals from leaking into the soil and contaminating groundwater. The plastic utilized for these liners must be capable of withstanding the excessive weight of stacked ore, the continuous application of corrosive chemicals, and harsh weather conditions over the long term.  3, fiche 1, Anglais, - heap%20leach%20pad

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 CONT

Un aspect important, dans un contexte de risques, de nombreuses mines métalliques, a trait à l'extraction de métal sur des aires de lixiviation en tas. Cette technique est utilisée pour l'extraction dans le cas de l'or, du cuivre, de l'argent, de l'uranium, du nickel ainsi que de plusieurs autres métaux et métalloïdes [...] Une aire de lixiviation en tas consiste de manière schématique en une barrière composite [...] sur laquelle est placé le minerai destiné à être lixivié à l'aide, soit d'un acide fort (de l'acide sulfurique dans le cas du cuivre et du nickel), ou alors d'une solution diluée de cyanure (cas de l'or et de l'argent).  3, fiche 1, Français, - aire%20de%20lixiviation%20en%20tas

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

A solution in hydrometallurgical treatment from which all possible valuable constituents have been removed.  4, fiche 2, Anglais, - barren%20leach%20solution

Record number: 2, Textual support number: 1 CONT

Heap leaching is often the most cost-effective way to extract value from gold or copper ores. Heap leaching involves placing ore-grade material on an impermeable liner foundation with a solution collection system of drainpipes and irrigating the surface with either cyanide solution(for gold) or acid(for copper). Within the heap, chemical reactions occur which liberate the payable metal from the rock. The resultant solution, called pregnant leach solution(PLS), reaches the liner and the collection pipes, and then reports to a storage facility(pond) for processing where the metal is removed, the solution conditioned, and re-applied to the HLP [heap leach pad] as barren leach solution(BLS).  1, fiche 2, Anglais, - barren%20leach%20solution

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Dans un procédé de lixiviation, solution à partir de laquelle les métaux dissous ont été extraits.  2, fiche 2, Français, - solution%20st%C3%A9rile

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 CONT

The Materiel Group Home Loan Program...has been designed to offer ADM (Mat) employees an opportunity to enhance their computer skills at their own pace in their own home.  1, fiche 3, Anglais, - Home%20Loan%20Program

Fiche 3,  Justifications,  Français

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Français

Fiche 4,  Justifications,  Espagnol