| Full text | |
| Author(s): |
Freitas, Ana Carolina Vasques Freitas
;
Belardi, Rose -Marie
;
Barbosa, Henrique de Melo Jorge
Total Authors: 3
|
| Document type: | Journal article |
| Source: | ATMOSFERA; v. 35, n. 4, p. 22-pg., 2022-10-01. |
| Abstract | |
Itabira has in its territory the largest complex of opencast mining in the world, located close to residential areas of the city. The air quality monitoring network installed in the city is the main source of particulate matter (PM) emission data. However, these air quality stations only cover the areas near the mines and do not measure fine particulate matter (PM2.5). Thus, a first field campaign was carried out to characterize PM in the city and to compare high volume data from air quality stations with the dichotomous air sampler data. Results of trajectories' cluster analysis showed a long-range transport of aerosols during the sampling days from northeast (84% of the trajectories), east-southeast (12%), and south-southwest (3%) directions. Regard-ing the meteorological conditions during the sampling days, negative correlations were seen between coarse particulate matter (PM10) from mostly air quality stations and all meteorological parameters (but temperature). Results of the X-ray fluorescence and principal component analyses showed that the main trace elements in the coarse (PM2.5-10) and fine modes (PM2.5) are iron and sulfur, associated with emissions from mining activities, air mass transport from regional iron and steelmaking industry activities, vehicle emissions, local and regional biomass burning, and natural biogenic emissions. This work is the first assessment of source apportionment done in the city. Comparisons with other studies, for some large metropolitan areas, showed that Itabira has comparable contributions of sulfur, iron and elements such as copper, selenium, chromium, nickel, vanadium and lead. (AU) | |
| FAPESP's process: | 13/50510-5 - Brazil-USA collaborative research: modifications by anthropogenic pollution of the natural atmospheric chemistry and particle microphysics of the tropical rain forest during GoAmazon intensive operating periods |
| Grantee: | Henrique de Melo Jorge Barbosa |
| Support Opportunities: | Research Program on Global Climate Change - Regular Grants |
| FAPESP's process: | 09/54201-1 - Acquisition of an X-ray spectrometer for the measurement of trace elements in atmospheric aerosols |
| Grantee: | Paulo Eduardo Artaxo Netto |
| Support Opportunities: | Multi-user Equipment Program |
| FAPESP's process: | 17/17047-0 - Aerosol and clouds life cycles in Amazonia: biogenic emissions, biomass burning and impacts on ecosystem |
| Grantee: | Paulo Eduardo Artaxo Netto |
| Support Opportunities: | Research Program on Global Climate Change - Thematic Grants |