The study was conducted in order to assess the pollution due to the transport of mining products and to know if the dust from ores and mining discharges are loaded with MTE and to assess their impact on the environment.

The results of the qualitative analysis on the dust in the air highlighted the metallic elements in traces. This made it possible to identify the elements Cu, Cd, Co, Pb, As, Cr, Se, Sn, Ni and Zn, which elements are also found in mining and ore waste. This proves that there is transposition of MTE from mining and ore discharges to the air breathed by the inhabitants of the neighborhoods crossed by this mining transport.

The results of quantitative analysis showed that copper has the highest contents of all determined MTE followed by cobalt and zinc. The soil analysis results show that during the dry season the MTE are much more concentrated on the surface of the soil and infiltrate with difficulty, whereas during the rainy season rainwater and the acidity of mining discharges are at the basis of the mobility of MTE that infiltrate soils.

The samples taken 5 m from the road show very high Cu, Cd, Pb and Zn contents which even far exceed the standard values ​​than those taken 15 m away. This reveals that the soil near the road is indeed more exposed to receiving pollutants from mining transport.

Determining the levels of MTE in the air makes it possible to assess the risks of contamination of the trophic chain on the one hand and on the other to develop appropriate remediation techniques.