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Previous issue date: 2017-02-22 / Para compreender os processos de emiss?o de poluentes para a atmosfera, assim como consequentes transforma??es qu?micas e eventual contamina??o da atmosfera, ? importante monitorar o ar buscando identificar e quantificar as diferentes esp?cies qu?micas presentes, principalmente em ?reas influenciadas pela a??o do homem, atrav?s das atividades industriais, transporte e gera??o de energia. Estes setores geram emiss?es massivas de gases e material particulado para a atmosfera. Este trabalho teve como objetivo caracterizar o material particulado suspenso no ar em um local representativo do Vale do A?u exposto, entre outros, a emiss?es de queima de biomassa, onde foi quantificado o material particulado total atrav?s de an?lise gravim?trica, e a composi??o qu?mica e a an?lise morfol?gica do material particulado foi feita atrav?s da Microscopia Eletr?nica de Varredura (MEV) equipada com detectores de Energia Dispersiva de Raios-X (EDS). A coleta das amostras foi realizada no Instituto Federal de Educa??o Ci?ncias e Tecnologia do Rio Grande do Norte, campus Ipangua?u, por um per?odo de dois meses (25/05/2016 ? 25/06/2016 e 01/11/2016 ? 30/11/2016), cada m?s referente ? esta??o seca e ?mida, respectivamente. Para a coleta foram utilizados dois amostradores, um de material particulado grosso (AGV-MP10) e outro de part?culas totais em suspens?o (HANDI-VOL). As coletas foram realizadas de acordo com as Normas da Associa??o Brasileira de Normas T?cnicas (ABNT), descrita para o Amostrador de Grande Volume (AGV) e para Part?culas Totais em Suspens?o (PTS). Posteriormente realizou-se an?lise de gravimetria durante a qual foi realizado o c?lculo de concentra??o desse material atrav?s da diferen?a entre a massa do filtro antes e ap?s a coleta. Os resultados mostram que as m?dias di?rias de concentra??o de massa do MP10 para o m?s de junho variaram de 10,13 a 86,48 ?g/m3. J? as concentra??es m?dias di?rias de PTS variaram de 29,86 a 146,05 ?g/m3 no per?odo de junho, em novembro essas concentra??es variaram de 44,37 a 81,25 ?g/m3. Os resultados das concentra??es dos poluentes foram relacionados estatisticamente com vari?veis meteorol?gicas para obter rela??o sobre os efeitos dessas vari?veis na concentra??o desses poluentes. A partir da an?lise por MEV (EDS), foi poss?vel identificar part?culas com forma de aglomerados, esf?ricas e placas, com os elementos qu?micos com maior concentra??o presentes nos filtros sendo: S, K, Si, Al, Cl, Fe, Ba, Ca, Na, Mg e Zn. Finalmente, foram feitas simula??es para identificar a origem deste material particulado, usando o modelo de retro-trajet?rias HYSPLIT. / To understand the emission processes of pollutants to the atmosphere, as well as their chemical transformation and, consequently, eventual contamination of the atmosphere ,monitoring is important to seek identifying and quantifying the present different chemical species, mainly in the anthropogenically influenced areas influenced by industrial and transportactivities, and generation of energy. These sectors produce massive emissions of gases and particulate matter into an atmosphere. This work aimed at characterizing the suspended particulate material at a representative location of the A?u Valley exposed, among others, to biomass burning emissions, where total particulate matter was analyzed through gravimetric analysis, and chemical and morphological analysis of the particulate material were assessed through Scanning Electron Microscopy (SEM) equipped with X-ray Dispersive Energy (EDS) detectors. Sampling was carried out by the Institute of Science and Technology of Rio Grande do Norte, Campus Ipangua?u, for a period of two months (May 25, 2016 to June 26,2016 and November 1-30, 2016), each month referring to the dry and humid season, respectively. Two samplers were used: one for coarse particulate matter (HVS-MP10) and one for Total suspended Particulate Matter (HANDI-VOL). Samples were taken according to the Brazilian Association of Technical Standards (ABNT), describing the High Volume Sampler (HVS) and Total Suspended Particles (PTS). Subsequently, the gravimetric analysis was carried out, where the concentration of material was calculated through the difference between the filter massbefore and after collection. The results show that average daily PM10 mass concentrations for the month of June ranged from 10.13 to 86.48 ?g/m3. Mean daily mass concentrations of PTS varied from 29.86 to 146.05 ?g/m3 in June, while in November mass concentrations ranged from 44.37 to 81.25 ?g/m3. The pollutants concentration results were statistically related to meteorological variables to obtain a relation of the effects of those variables on pollutant concentrations. By the SEM analysis, it was possible to identify particles in agglomerated, spherical, and plaque formats. The major chemical elements of the collected samples were: S, K, Si, Al, A, S, K, Si, Al, Cl, Fe, Ba, Ca, Na, Mg and Zn. Finally, simulations of the area of origin of this particulate material were performed by using the HYSPLIT backward trajectory model.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23455 |
| Date | 22 February 2017 |
| Creators | Soares, Cynthia Gabriella Cunha da Silva |
| Contributors | 23182367803, http://lattes.cnpq.br/6590472437235971, Bezerra, Bergson Guedes, 99210703472, http://lattes.cnpq.br/1901216516407999, Spyrides, Maria Helena Constantino, 79203183434, http://lattes.cnpq.br/5023632543506327, Fernandes, Glauber Jos? Turolla, 72074442491, http://lattes.cnpq.br/6067867622712912, Bezerra, Diogo Pereira, Hoelzemann, Judith Johanna |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIAS CLIM?TICAS, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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