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→Health effects of Cadmium, Cd
===Health effects of Cadmium, Cd===
===Health effects of Cadmium, Cd===
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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>
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).
[[TABLE 5]]
[[TABLE 5]]
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]].
[[File:UNN_Medical_Geology_Fig_9.png|thumb|400px|{{figure number|9}}]]
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).