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Hydrogeochemical processes in the Kafue River upstream from the Copperbelt mining area
Luleå tekniska universitet.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0003-2276-0564
2000 (English)In: Aquatic geochemistry, ISSN 1380-6165, E-ISSN 1573-1421, Vol. 6, no 4, p. 385-411Article in journal (Refereed) Published
Abstract [en]

Frequent sampling during an annual cycle of dissolved(<0.45 μm) and suspended (>0.45 μm) elementshas been conducted in the Kafue River at Raglan'sFarm, upstream from the mining activities within theCopperbelt Province, Zambia. Additional sampling ofsediment and interstitial pore water was conductedduring low water discharge. The presence of carbonateswithin the drainage basin naturally gives rise to highelement concentrations in the dissolved phase(Ca = 626, Mg = 494, Na = 360 and K = 24 mmol l-1).During the rainy season the relative composition ofthe dissolved elements indicated a wash out ofaccumulated weathering products and mineralisedorganic material from the unsaturated zone of the soilprofile. High concentrations of dissolved Al, Fe andMn were measured during high water discharge. At lowwater discharge the sediment was a major source of Fe,Mn and associated Co and Cu to the water column.Enhanced concentrations of dissolved and suspended S,Co and Cu during the rainy season indicated thatatmospheric deposited particles from the mining areawere washed out into the river. Autochthonousformation of particles rich in Si indicated diatomproduction during low water discharge.

Place, publisher, year, edition, pages
2000. Vol. 6, no 4, p. 385-411
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-6408DOI: 10.1023/A:1009610327246ISI: 000165376600001Scopus ID: 2-s2.0-0034517978Local ID: 4a1cc230-1ba7-11dd-8c59-000ea68e967bOAI: oai:DiVA.org:ltu-6408DiVA, id: diva2:979293
Note
Validerad; 2000; 20080506 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Ingri, Johan

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