Cumulative impact assessment on air quality from multiple open pit mines.
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Data
2016
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Resumo
Both open pit mine and smelter projects can
have significant impacts on a variety of environmental
resources. Among these, air quality of the surroundings is a
key issue. Additionally, the environmental assessment of
projects demands integrated approach taking in account all
pollution sources. Therefore, specific focus has been put on
the methodology for assessing impacts on air quality. This
paper proposes an integrated index of environmental
impact aiming to quantify the air quality impact of industrial
operations around an urban area, in case of scarcity of
in situ acquired data. This proposed pollution index is
demonstrated by a case study conducted in the municipality
of Congonhas, Brazil, in which contributions of five open
pit mines and two smelters were studied. To achieve the
pollution index, the wind rose and distances from the
centroids of effective areas to the urban nucleus itself were
considered, taking into account the wind projection areas
from windward impacting sources on the leeward impacted
urban site. The proposed index also includes the squared
wind speed (proportional to the kinetic energy transferred
in uplifting dust from ground surface). The method proposed
is considered suitable for impact assignment for each
one of the air pollution sources in the neighborhood of
studied area. Some fluid dynamic aspects of airborne particulate
matter are also studied by proposing a new equation
for threshold saltation speed.
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Palavras-chave
Integrated impact, Dust generation, Open pit mines, Smelters, Saltation velocity
Citação
ANDRADE, P. C. C. et al. Cumulative impact assessment on air quality from multiple open pit mines. Clean Technologies and Environmental Policy, v. 18, n. 2, p. 523-532, fev. 2016. Disponível em: <https://link.springer.com/article/10.1007/s10098-015-1027-5>. Acesso em: 10 jul. 2017.