The effect of global warming on drybean and maize production on the highlands of Mexico
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Abstract
The pollution of the soil is a loss of this resource, besides the pollutants constitute a risk for the environment and the health of the persons. Lead (Pb) and cadmium (Cd) are very toxic elements for the alive organisms and some times arrive of waste industry mining. The objective of this study was to evaluate the level of pollution by Pb and Cd in the waste of a mining company out of service, in bordering areas to the company. The study was realized in the south-oriental zone of Chihuahua's city. 30 soil samples was taken of 0 to 10 cm of deep in areas with population and recreative bordering to the mining company. The concentration of Pb and Cd was obtained by spectrophotometry of atomic absorption. The results were analyzed in agreement to international standards. There were generated graphs of Batelle's environmental quality. The analysis of Pb shows very high levels in some adjacent sampling points to the source pollution and Cd appears in a more homogeneous way and with relative risk. The evaluation of environmental impact indicates that between 90 % and 60 % of the samples points exceed some standards for Pb and 80 % and 40 % for Cd. The south-east zone of Chihuahua's city is a pollution area by this mining company.
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