Geochemistry, mineralogy and environmental impact of precipitated efflorescent salts at the Kabwe Cu–Co chemical leaching plant in Zambia

Šráček, Ondra; Veselovský, František; Křı́bek, Bohdan; Malec, Jan; Jehlička, Jan

doi:10.1016/j.apgeochem.2010.09.008

Cited by 27 publications

(12 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The obtained lines in the IR and Raman spectra of natural chalcanthite showed good agreement with the known experimental data [29,[40][41][42][43][44][45][46][47][48][49]. In Fig.…”

Section: Description Of the Samplesupporting

confidence: 86%

Low-temperature heat capacity and thermodynamic functions of natural chalcanthite

Bissengaliyeva¹,

Bekturganov

Gogol³

et al. 2017

The Journal of Chemical Thermodynamics

View full text Add to dashboard Cite

“…The obtained lines in the IR and Raman spectra of natural chalcanthite showed good agreement with the known experimental data [29,[40][41][42][43][44][45][46][47][48][49]. In Fig.…”

Section: Description Of the Samplesupporting

confidence: 86%

Low-temperature heat capacity and thermodynamic functions of natural chalcanthite

Bissengaliyeva¹,

Bekturganov

Gogol³

et al. 2017

The Journal of Chemical Thermodynamics

View full text Add to dashboard Cite

“…Suspended particles settle during low discharge (dry) periods, but they can be re-suspended during high discharge in rainy periods. Furthermore, efflorescent salts precipitated in dry periods may dissolve at the beginning of a rainy period with a resulting acid pulse and high concentrations of metals (Sracek et al, 2010c). Another source of contamination in the rainy season in the Copperbelt is leaching of atmospheric deposited particles (Petterson et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Mining-related contamination of surface water and sediments of the Kafue River drainage system in the Copperbelt district, Zambia: An example of a high neutralization capacity system

Šráček

Křı́bek

Mihaljevič

et al. 2012

Journal of Geochemical Exploration

View full text Add to dashboard Cite

“…Alunite is a common alteration mineral in these types of deposits, and alum is a common mineral formed from sulfide mineral oxidation (Szakáll et al, 1997). Espomite is a secondary mineral that is often found growing on the walls of metal mines through sulfide oxidation (Jambor et al, 2000;Steiger et al, 2011;Sracek et al, 2010;Matýsek et al, 2014;Buckby et al, 2003;Jamieson et al, 2015) Figure Hexahydrite is a monoclinic sulfate with water content and was observed as encrustations in the field and its occurrence is a result of sulfide mineral oxidation (Jambor et al, 2000). Starkeyite is a dehydrated version of hexahydrite.…”

Section: In-rmatrmentioning

confidence: 99%

“…Loweite and blodite may both occur in evaporitic environments and from sulfidic mine waste (Leduc, 2010;Stoilova and Wildner, 2004;Lottermoser, 2010c). Bonattite may form as a dehydration product of chalcanthite (Sracek et al, 2010).…”

Section: In-rmatrmentioning

confidence: 99%

Geochemical Characterization of Coexisting Precipitates and Waters From High-Sulfidation Epithermal Gold Deposits

Manoukian¹

2016

Geological Society of America Abstracts With Programs

View full text Add to dashboard Cite

Water management and treatment at closed mine sites have become primary concerns for mining companies due to their costly nature, potential commitment of decades of water treatment, and impact on the environment. The long-term objective of this research investigates methods of extracting metals from acid mine waste in order to minimize the environmental impact of the drainage and decrease the financial burden on mining companies. However, understanding the mechanism of element mobility in mine waste requires a comprehensive assessment of the composition of the water and co-existing minerals at studied mines El Indio, Lagunas Norte and Pierina, which is the primary goal of this thesis. No study has previously provided a detailed analysis of the secondary precipitates at these mines or their role in storing trace elements.Water samples were analyzed by inductively coupled mass spectrometry and inductively coupled optical emission spectrometry. Coexisting mineral samples were characterized using an environmental scanning electron microscope, X-ray diffraction and synchrotron-based microanalysis. The pH of waters is acidic with values of 2.24 to 4.5. Major elements in waters include Ca, Al, Fe and SO4; minor elements include Cu, Mg, Mn, Zn, K, Na and trace elements consisted of As, Co, Ni, Sr, Pb and Cd. This study has identified previously unreported phases that may be placed into 3 broad groups: 1) hydrous Na-, Mg-, Ca, Cu-and other metal-sulfates such as blodite group minerals, hexahydrite and gypsum 2) Fe-oxides, oxyhydroxides and oxyhydroxysulfates such as ferrihydrite, goethite, scorodite and jarosite 3) other metal-rich, poorly crystalline Al phases. Synchrotron microanalysis has shown that these minerals sequester Cu, Mn, Zn, Cd, As, Ni and other trace elements. This research has improved the understanding of the mobility of elements by identifying the trace elements associated with minerals and by characterizing the relationship between chemistry of precipitates and solution. The occurrence of secondary precipitates stands as evidence purporting that sulfide oxidation at these mine sites is ongoing. Barrick Gold Corporation can consider capturing the sulfate-rich secondary precipitates by mechanically enhanced pond-evaporation and precipitation of efflorescent salts, methods which may allow to efficiently capture elements of interest.

show abstract

Geochemistry, mineralogy and environmental impact of precipitated efflorescent salts at the Kabwe Cu–Co chemical leaching plant in Zambia

Cited by 27 publications

References 27 publications

Low-temperature heat capacity and thermodynamic functions of natural chalcanthite

Low-temperature heat capacity and thermodynamic functions of natural chalcanthite

Mining-related contamination of surface water and sediments of the Kafue River drainage system in the Copperbelt district, Zambia: An example of a high neutralization capacity system

Geochemical Characterization of Coexisting Precipitates and Waters From High-Sulfidation Epithermal Gold Deposits

Contact Info

Product

Resources

About