**6. Conclusions**

**A**

of Hg2+ followed during 13 h of treatment, close to anode and cathode.

process in continues flow in presence of EDTA (D).

844 Environmental Risk Assessment of Soil Contamination

**B C**

**Figure 5.** Localization of Queretaro in Mexico (A) with satellite image from San Joaquin's Sierra Gorda, Queretaro (B) where there is the Mine "El Rincón" (C) with high concentration of Hg2+, which was removed with electroremediation

**Figure 6.** Electroremediation process in batch reactor assisted by EDTA (A), and its corresponding removal percentage

**D**

Mercury is a non-essential metal that can bioacumulated in living organisms, causing toxic effects of various kinds. Therefore, it is vital to understand how this metal is transmitted through the environment and the changes that occur due to contact with living organisms, or environmental conditions such as high temperatures or strong winds. A study of the reactions that form organic or inorganic compounds, which are even more toxic, is also necessary to limit mercury toxicity. This research gives a brief overview of the techniques commonly used for treatment of sediment and soil contaminated with mercury, mobilization and loadings the mobilized mercury across different matrixes of environment, in specially electroremediation of mercury polluted soil, facilitated by the use of complexing agents as EDTA, proved to be an attractive alternative treatment for the removal of mercury from polluted soil in mining areas.
