Ecological risk assessment
The pollution index (I-geo) provides a useful tool to evaluate potential
environmental contamination. On considering the I-geo (Table 3) values
it can be observed that all values fall in the 0 class, which indicates
the absence of contamination, i.e. almost all of the elements are of
natural origin or from natural weathering processes. Only Cu, Ni and Co
fall into the class 1 category and these elements are therefore
influenced slightly by human activity.