Use of activated carbon filter in infiltration well for retention of metallic contaminants present in the urban environment
DOI:
https://doi.org/10.5902/2179460X68821Keywords:
Flooding, Infiltration well, FilteringAbstract
In cities, flooding negatively impacts the lives of its residents and passersby, who are unable to move during the phenomenon of heavy rain, with potential loss of human and material goods, coexisting with the risk of contamination through direct or indirect contact with the water retained in the pavement. With the premise of addressing this issue, this research brings, as a structural alternative, the use of an infiltration well, adapted to mitigate flooding, adjunct in parallel to the public rainwater drainage system, and capable of promoting the restitution of the water resource to the water table through infiltration and, notably, free from external pollutants. Thus, the use of granular activated carbon as filtering material in this structure was foreseen, for the retention of contaminants present in the impermeable urban surface. These contaminants include heavy metals such as Lead (Pb), Chromium (Cr), Cadmium (Cd) and Nickel (Ni). The efficiency of this filter was evaluated through a comparison with the results obtained in samples of runoff water, corresponding to the rainy season for an urban environment delimited in Cuiabá City. It was concluded that each gram of filtering material has a capacity to retain contaminants such as Pb and Cd, respectively of 12,05 mg and 30,58 mg, above the concentrations observed in the field. Therefore, such material has the potential for removal of even more metallic compounds, providing greater safety to human health and the environment. Regarding the elements Cr and Ni, these were not found in significant concentrations, thus not offering any risk to groundwater or requiring a filtering process.
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