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| ===Health effects of Cadmium, Cd=== | | ===Health effects of Cadmium, Cd=== |
− | [[File:UNN_Medical_Geology_Fig_8.png|thumb|400px|{{figure number|8}}Distribution of Cadmium in the central districts of Jamaica (after Wright et al, 2010).]]
| + | <gallery mode=packed heights=300px widths=300px> |
| + | UNN_Medical_Geology_Fig_8.png|{{figure number|8}}Distribution of Cadmium in the central districts of Jamaica (after Wright et al, 2010). |
| + | UNN_Medical_Geology_Fig_9.png|{{figure number|9}}Correlation between yam Cd concentration and soil Cd concentration (Wright et al, 2010). |
| + | </gallery> |
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| Cadmium has great affinity for sulphides and is therefore associated with sulphide deposits. It has very similar tetrahedral covalent radius to that of zinc; thus, it can displace zinc from sphalerite (ZnS). | | Cadmium has great affinity for sulphides and is therefore associated with sulphide deposits. It has very similar tetrahedral covalent radius to that of zinc; thus, it can displace zinc from sphalerite (ZnS). |
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| [[TABLE 5]] | | [[TABLE 5]] |
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− | Amongst the above plant species, yam and carrot show the greatest ability to store cadmium. The concentration of cadmium in yam increases as the soil Cd level increases; it, however, decreases at low levels indicating toxicity as shown in Fig. 9. | + | Amongst the above plant species, yam and carrot show the greatest ability to store cadmium. The concentration of cadmium in yam increases as the soil Cd level increases; it, however, decreases at low levels indicating toxicity as shown in [[:File:UNN_Medical_Geology_Fig_9.png|Figure 9]]. |
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− | [[File:UNN_Medical_Geology_Fig_9.png|thumb|400px|{{figure number|9}}]] | |
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| Toxicity effects of cadmium occurred in Jamaica as a result of food intake from Cd- contaminated food crops, legumes and vegetables. The mean Cd intake was 9.3 μg/kg bodyweight/week above WHO guideline of 7 μg/kg bodyweight/week while the drinking water standard for cadmium is 5μg l-1 (Wright et al, 2010). | | Toxicity effects of cadmium occurred in Jamaica as a result of food intake from Cd- contaminated food crops, legumes and vegetables. The mean Cd intake was 9.3 μg/kg bodyweight/week above WHO guideline of 7 μg/kg bodyweight/week while the drinking water standard for cadmium is 5μg l-1 (Wright et al, 2010). |