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Journal of Medical Sciences
  Year: 2015 | Volume: 15 | Issue: 1 | Page No.: 1-9
DOI: 10.3923/jms.2015.1.9
 
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Geophagy and Heavy Metals (Pb, Cd and Hg) Content of Local Kaolin Varieties in the Cameroon Market: Assessment Indices for Contamination and Risk of Consumption or Toxicity to the Population

J. N. Bonglaisin, C. M.F. Mbofung and D. N. Lantum

Abstract:
This study was conducted to profile the mining distribution, sale and consumption of most common kaolin in Cameroon, to determine the levels of Pb, Cd and Hg in local kaolin varieties at the sale points and to observed contamination possibilities. Preliminary questionnaires were administered to 1102 individuals from cosmopolitan cities, to determine some anthropometric parameters and consumption rate. A more detailed questionnaire was also administered to 122 vendors in the markets visited. Information requested included: Market situation of kaolin and consumption rate, source of procurement, awareness of the ban passed on kaolin, reasons for kaolin consumption, quantity consumed per day and most common variety. Results show that varieties (pink, white, yellow, grey, green and multicoloured) of kaolin are contaminated with Pb, Cd and Hg in a disproportionate manner, with the grey kaolin being the commonest and the most widely consumed variety. Additional contamination occurs for Pb and Cd as the grey variety is conveyed from the mining sites to the markets. Differences in Pb, Cd and Hg contents amongst the mining sites of kaolin were statistically insignificant. These differences were statistically significant for markets (p = 0.0007). Differences between Pb and Cd mean values at mining sites and markets are significant while that for Hg were insignificant. Post mining contamination, health risk and potential toxicity indices revealed that grey kaolin is contaminated by Pb and Cd after mining and consumers of kaolin will have high risk to toxicity of Pb, Cd and Hg.
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How to cite this article:

J. N. Bonglaisin, C. M.F. Mbofung and D. N. Lantum, 2015. Geophagy and Heavy Metals (Pb, Cd and Hg) Content of Local Kaolin Varieties in the Cameroon Market: Assessment Indices for Contamination and Risk of Consumption or Toxicity to the Population. Journal of Medical Sciences, 15: 1-9.

DOI: 10.3923/jms.2015.1.9

URL: https://scialert.net/abstract/?doi=jms.2015.1.9

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