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Publication Type
Conference Proceedings
Author, Analytic
Mandal, Arpita; Voutchkov, Mitko; Maharaj, R.; Madourie, M.
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Paper/Section Title
Geochemistry of soils around the Cement Factory in Kingston, Jamaica.
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Proceedings Title
8th Conference Faculty of Pure and Applied Sciences
Date of Meeting
February 26-28, 2008.
Place of Meeting
UWI, Mona Campus
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Date of Publication
2008
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Abstract
The Caribbean Cement Company (Carib Cement), located in Rockfort, Kingston, has been producing a consistently high quality of Portland cement using one hundred percent Jamaican raw materials since 1952. The raw materials used in the manufacturing process are all mined within ten miles of the plant. There are a number of environmental hazards from the cement industry, mainly emission of dust from the stack attached with a) raw kiln, b) clinker cooler and c) stack attached with the coal mill. This dust settles in due course on the top soil, vegetation cover and in nearby residential communities. Chemically the cement kiln dust (CKD) consists of calcium oxide, silicates, carbonates, potassium oxide sulphates, chlorides, sodium oxide and various trace metals including toxic and radioactive elements. The heavy metals in the dust, when deposited on the surface soil may move to the plant-food chain. The dust from the cement industry gets washed out by the rain and flows as surface run-off into the sea, thus polluting the sea water. Preliminary field work has been conducted and surface soil samples have been collected from specific locations. The samples have been crushed, ground and sieved to 45 microns and analysed for their mineralogical content by XRD. Elemental analysis of the soils for As, Cd, Ni, Co, Cu, Cr, Pb and Zn, have been done by XRF and NAA. The elemental analysis of the collected top soil samples show significant higher concentration of calcium, lead, strontium and zinc than the standard certified values for soil as provided by the NIST-2709 standard reference. Mineralogically most of the analysed soils show presence of quartz, calcite, albite and aluminosilicates.....
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