Characterization of urban aerosol in Campinas, São Paulo, Brazil

Miranda, Regina Maura de; Tomaz, Edson

doi:10.1016/j.atmosres.2007.08.002

Cited by 31 publications

(23 citation statements)

References 13 publications

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“…65%. Similar studies were also performed for Campinas 16 and São Paulo Cities. 17,18 In a recent study, 13 TSP and PM 10 samples were collected at the Major José Carlos Lacerda Bus Station in Duque de Caxias City (Rio de Janeiro Metropolitan Area) where buses were the only significant emission sources, representing ca.…”

Section: Introductionsupporting

confidence: 59%

Trace metals in the urban aerosols of Rio de Janeiro city

Loyola

Arbilla

Quitério

et al. 2012

J. Braz. Chem. Soc.

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De janeiro a abril de 2009, amostras de partículas suspensas (TSP) e de materiais particulados (PM 10 e PM 2.5 ) foram coletadas de uma área urbana característica altamente impactada pelo tráfego de veículos. As concentrações de metais nestas amostras foram determinadas por ICP-OES (espectroscopia de emissão por plasma indutivamente acoplado). Ca, Mg, Fe e Al foram os metais mais abundantes presentes em TSP e PM 10 , com concentrações maiores que 427 ng m -3 . Em PM 2.5 , os metais mais abundantes foram Fe e Ca (307 e 60 ng m -3 , respectivamente), enquanto que as concentrações de Mg, Zn e Cu foram aproximadamente 20 ng m -3 . Para PM 10 e PM 2,5 , correlações elevadas foram obtidas para Ca, Mg e Al, enquanto a correlação de Ca e Mg com Fe mostrou-se pobre, indicando assim que Ca, Mg e Al provavelmente se originam principalmente da resuspensão de poeira, enquanto Fe pode ser também proveniente de uma fonte adicional, como o desgaste de freio. Elementos antropogênicos (Zn e Cu) tiveram fatores de correlação baixos, sugerindo fontes de emissões diferentes. A presença de Cu pode estar relacionada com o desgaste dos freios e a de Zn pode ser atribuída ao desgaste do pneu. Em partículas finas, Ca, Mn, Fe, Zn e Cu estavam presentes em razões mais elevadas do que em material da crosta. Uma vez que estas partículas são observadas principalmente devido aos processos de combustão, elas podem estar presentes na gasolina, óleo e lubrificantes. Fe foi correlacionado com Mn, enquanto fatores de correlação entre Ca e Mg foram relativamente baixos.From January to April 2009, samples of suspended particles (TSP) and particulate matters (PM 10 and PM 2.5 ) were collected from a well-characterized urban area that is highly impacted by vehicular traffic. The metal concentrations in these samples were determined using ICP-OES (inductively coupled plasma-optical emission spectroscopy). Ca, Mg, Fe and Al were the most abundant metals present in TSP and PM 10 , with concentrations higher than 427 ng m -3 . In PM 2.5 , the most abundant metals were Fe and Ca (307 and 60 ng m -3 , respectively), while the concentrations of Mg, Zn and Cu were approximately 20 ng m -3 . For PM 10 and PM 2.5 , high correlations were obtained for Ca, Mg and Al, while the correlation of Ca and Mg with Fe was poor, thereby indicating that Ca, Mg and Al probably originate mainly from the resuspension of dust, while Fe may also be originated from an additional source, such as brake wear. Anthropogenic elements (Zn and Cu) had low correlation factors, suggesting different emission sources. The presence of Cu may be linked to the abrasion of brakes, and Zn may be attributed to tire wear. In fine particles, Ca, Mn, Fe, Zn and Cu were present in higher ratios than in crustal material. Because these particles are mainly observed due to the combustion processes, they may be present in gasoline, oil and lubricants. Fe was correlated with Mn, while correlation factors between Ca and Mg were relatively lower.Keywords: total particulate matter, PM 10 , PM 2.5 , trace meta...

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Section: Introductionsupporting

confidence: 59%

Trace metals in the urban aerosols of Rio de Janeiro city

Loyola

Arbilla

Quitério

et al. 2012

J. Braz. Chem. Soc.

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“…Soils derived from basic rocks naturally have more heavy metals (including Cu, Ni and Zn) than those derived from sandstone, siltstone or gneiss (Wilson et al 2008, Nagajyoti et al 2010). In the Campinas region, Miranda & Tomaz (2008) reported that the soil was the main source of aluminum, while for zinc, copper and sulphur the main sources were industries and vehicle emissions. Monaci et al (2000) found high concentrations of aluminum, iron, copper, manganese and zinc in the particulate material originated from vehicular emissions.…”

Section: Discussionmentioning

confidence: 99%

Soil chemical and physical status in semideciduous Atlantic Forest fragments affected by atmospheric deposition in central-eastern São Paulo State, Brazil

Lopes¹,

Santos²,

Camargo³

et al. 2015

iForest

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© iForest -Biogeosciences and Forestry IntroductionThe Brazilian Atlantic biome is recognized as one of the hotspots for the conservation of biodiversity (Forzza et al. 2012), though it is severely affected by diverse human interferences, particularly in the State of São Paulo, southeastern Brazil (Domingos et al. 2003). The semideciduous Atlantic Forest is highly fragmented in central-eastern São Paulo because of the expansion of agriculture and urban and industrial growth (Nalon et al. 2008). Besides the reduction of forest cover, human activities bring about a variety of pollutants from combustion of fuels, waste disposal, long-term sewage sludge and fertilizer application and other sources, which may be toxic to the plant community and modify the chemical status of soil, depending on its original chemical and physical conditions (Nriagu 1990, Sharpley 1995, Schaaf et al. 2004, Pouyat et al. 2008, Lucas et al. 2011. Soil nutrients are among the main factors that regulate plant growth and play an important role in the sustainable use of soils; however, their excess due to pollution from human sources may damage the soils and affect the soil-plant relationships. Air pollution may also disrupt other nutrient cycling processes in natural ecosystems, such as the decomposition of litter (Cotrufo et al. 1995).Most anthropogenic pollutants deposited in forest ecosystems accumulate in the soil surface layers (Ruan et al. 2008), where pollutants are typically immobilized for long periods (Hawkins et al. 1995, Verstraeten et al. 2012. However, these accumulations are considered a "chemical time bomb" (Kabala & Szerszen 2002, Hovmand et al. 2008, because pollutants will eventually be leached into waterways (Miller & Friedland 1994).Increased deposition of sulfur and nitrogen compounds (SO2, NOx and NH3) in natural communities induces soil acidification (Falkengren-Grerup & Tyler 1993, Akselsson et al. 2013, Gao et al. 2013. Soil acidification depletes the basic nutrient cations, causes a decrease of pH, lowers the quality of humus, and accelerates the mobilization of aluminum (Boruvka et al. 2005, Miller & Watmough 2009). The depletion of basic cations from the forest floor alters the mineral nutrition of trees, modifies tree growth patterns (Klumpp et al. 2002, Högberg et al. 2006, Sebesta et al. 2011) and affects the distribution of roots (Joslin & Wolfe 1992). As a consequence, biodiversity, vegetation productivity and dynamics of the soil carbon pool are affected (Binkley et al. 2000).Altogether, such negative effects contribute to the forest decline observed in the Atlantic Rain Forest on the coastal mountain range named Serra do Mar (region of Cubatão, São Paulo State, Brazil). This forest is affected by air pollution from an industrial complex that caused destabilization of the land surface, disturbance of soil processes and landslides (Leitão Filho et al. 1993, Mayer et al. 2000a, 2000b. Furthermore, the large metropolitan regions of the São Paulo State (SE Brazil) are responsible for the intense fragmentation of...

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“…In the city of Campinas, São Paulo, studies show that PM 2.5 is made up of 48% elemental carbon and 22% organic carbon 100 . The main organic element was BC, representing 18% to 31% of PM 2.5 in Rio de Janeiro 103 .…”

Section: Physical and Chemical Characteristics Of Pollutants From Indmentioning

confidence: 99%

“…In metropolitan areas, PM is made up of mainly organic elements 95,100 . In the city of Campinas, São Paulo, studies show that PM 2.5 is made up of 48% elemental carbon and 22% organic carbon 100 .…”

Section: Physical and Chemical Characteristics Of Pollutants From Indmentioning

confidence: 99%