Journal ArticleDOI
Selective chemical extraction of Cu from selected mineral and soil samples: enhancement of Cu geochemical anomalies in Southern Portugal
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In this paper, a kinetic study of the selectivity of partial chemical extractions applied to Cu minerals has been carried out in order to establish a systematic procedure (reagents, extraction plateau, etc.) which could be recommended for soils of the two study zones.About:
This article is published in Journal of Geochemical Exploration.The article was published on 1992-06-01. It has received 8 citations till now. The article focuses on the topics: Atacamite & Oxalate.read more
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Application of selective extraction techniques in metal-bearing phases identification: a South European case study
TL;DR: In this paper, the application of selective extraction techniques on metal-bearing phases identified in gossan samples has been discussed, focusing on the detection of Zn and Pbbearing phases in Balsa-Portel area (southern Portugal).
Journal ArticleDOI
Mobilisation of arsenic at the Talhadas old mining area—Central Portugal
TL;DR: In this paper, the authors describe the As geochemical character at the former Talhadas old mine (Central Portugal) and investigate the mechanisms controlling the mobility of the element in tailings and the consequent impact on surface water downstream of tailing location.
Journal ArticleDOI
Geochemical signatures and mechanisms of trace elements dispersion in the area of the Vale das Gatas mine (Northern Portugal)
TL;DR: A geochemical survey involving the collection and analysis of 170 stream sediment samples was carried out in the Vale das Gatas area in order to delineate geochemical signatures and to detect pollution hazards due to mining.
Journal ArticleDOI
Improvement of mineralogical and chemical characterization to predict the acid leaching of geometallurgical units from Mina Sur, Chuquicamata, Chile
TL;DR: In this article, chemical and mineralogical changes were studied during experimental sulphuric acid leaching of oxide copper ores from Mina Sur, Chuquicamata, Chile, to validate predictive tools for the heap leaching process.
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Experimental leaching of atacamite, chrysocolla and malachite: Relationship between copper retention and cation exchange capacity
Sonia Helle,Ursula Kelm +1 more
TL;DR: Copper retention due to chemical and physical interaction with reactive gangues has been studied during sulphuric acid leaching of atacamite, chrysocolla and malachite, using a synthetic rock (57% quartz, 42% reactive gangue and 1% ore) as discussed by the authors.
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Journal ArticleDOI
Use of partial dissolution techniques in geochemical exploration
TL;DR: Partial dissolution techniques are classified as single dissolution or sequential multiple dissolution depending on the number of steps taken in the procedure, or as nonselective extraction and as "selective" extraction in terms of the relative specificity of the extraction as mentioned in this paper.
Journal ArticleDOI
The selective extraction of Pb and Zn in selected mineral and soil samples, application in geochemical exploration (Portugal)
E. Cardoso Fonseca,Henri Martin +1 more
TL;DR: In this article, a kinetic study of partial chemical extractions applied to minerals of Pb and Zn was undertaken in order to establish a systematic procedure (reagents, time of extraction, etc.) which could be recommended for the soils of the study area in Portugal.
Journal ArticleDOI
Potassium chlorate—hydrochloric acid: a sulphide selective leach for bedrock geochemistry
M. Olade,K. Fletcher +1 more
TL;DR: In this article, the authors compared the performance of potassium chlorate-hydrochloric acid and ascorbic acid-hydrogen peroxide, aqua regia, and nitric perchloric as a sulphide-selective leach for bedrock geochemistry, and concluded that the procedure is probably more selective than the other leaches and has the advantages of rapidity and simplicity.
Related Papers (5)
The selective extraction of Pb and Zn in selected mineral and soil samples, application in geochemical exploration (Portugal)
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Speciation of the most soluble phases in a sequential extraction procedure adapted for geochemical studies of copper sulfide mine waste
Bernhard Dold,Bernhard Dold +1 more