2003
DOI: 10.1639/0044-7447(2003)032[0047:mitmgu]2.0.co;2
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Mercury in the Moji-Guaçu River Basin, S.P—Brazil: The Link between Marginal Lagoons and River Contribution, Assessed by 210Pb Dating Profiles

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Cited by 5 publications
(8 citation statements)
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“…In Brazil, as in many developing countries, the volume of anthropogenic activities considered as Hg sources to the environment have been significantly increasing in the last few years, especially in urban areas (Lacerda, 1997), emphasizing the necessity of more studies about Hg contamination in urban and industrialized regions. São Paulo State is the most industrialized and crowded of Brazil and, although problems associated with water quality degradation have been documented for some rivers (Krusche et al, 1997;Ballester et al, 1999;Martinelli et al, 1999a,b;Daniel et al, 2002), there are only a few studies about heavy metal contamination (Boldrini et al, 1983;Tomazelli et al, in press;Tavares et al, 2003;Nascimento, 2003). Among the most polluted areas of the São Paulo State, the Piracicaba River Basin can be highlighted.…”
Section: Introductionmentioning
confidence: 99%
“…In Brazil, as in many developing countries, the volume of anthropogenic activities considered as Hg sources to the environment have been significantly increasing in the last few years, especially in urban areas (Lacerda, 1997), emphasizing the necessity of more studies about Hg contamination in urban and industrialized regions. São Paulo State is the most industrialized and crowded of Brazil and, although problems associated with water quality degradation have been documented for some rivers (Krusche et al, 1997;Ballester et al, 1999;Martinelli et al, 1999a,b;Daniel et al, 2002), there are only a few studies about heavy metal contamination (Boldrini et al, 1983;Tomazelli et al, in press;Tavares et al, 2003;Nascimento, 2003). Among the most polluted areas of the São Paulo State, the Piracicaba River Basin can be highlighted.…”
Section: Introductionmentioning
confidence: 99%
“…Tabela 1 -Valores de 210 Pb e 226 Ra (bq.g -1 ) e cronologia do perfil de sedimento da Lagoa Rio das Pedras, obtida através da técnica da datação pelo 210 Pb Camadas do perfil (cm) 210 Pb (Bq.g -1 ) 226 Ra (Bq.g -1 ) 210 Pb exc. (Bq.g -1 ) 210 Pb exc.m área (mBq/cm 2 ) Anos 0 a 1 0,180 0,027 0,153 18,64 0 1 a 2 0,085 0,027 0,058 9,33 1,9 2 a 3 0,082 0,025 0,057 10,9 2,9 3 a 4 0,109 0,030 0,079 16,2 4,2 4 a 5 0,100 0,028 0,072 14,5 6,1 5 a 6 0,112 0,034 0,078 14,8 7,9 6 a 7 0,084 0,035 0,049 9,1 9,8 7 a 8 0,087 0,037 0,050 10,0 11,1 8 a 9 0,148 0,032 0,116 24,4 12,5 9 a 10 0,121 0 Os resultados de taxas de deposição observados (entre 0,6 e 0,1 cm ano -1 ) são semelhantes aos verificados em outras lagoas marginais localizadas nas proximidades da área de estudo (GATTI, 1997;TAVARES et al, 2003), indicando que o perfil de 25 cm de profundidade representou cerca de 135 anos de história da deposição de material em suspensão na lagoa Rio das Pedras.…”
Section: Resultsunclassified
“…Rio Mogi-Guaçu (SP) --140 2 Boldrini et al, 1983 Lagoas da Bacia do rio Mogi-Guaçu (SP) --35 -56 Tavares et al, 2003 Bacia do rio Piracicaba (SP) 0,200 -0,600 60,0 93 ± 26 2 Falótico, 2001 Reservatório Billings (SP) 6,7 ± 0,4 143 ± 1 - . Os sedimentos são responsáveis em grande parte pelo transporte e estoque de metais e outros contaminantes, os quais podem não estar biodisponíveis em determinado momento mas, devido às mudanças nas condições físico-químicas e biológicas locais, tornam-se disponíveis aos organismos (Birch et al, 2001 (Phillips & Rainbow, 1994).…”
Section: Sedimento De Fundounclassified
“…Na bacia do rio Piracicaba, Fostier et al (op. cit.,p.19) Hurley et al, 1995 Rio Fox (EUA) até 36,0 Hurley et al, 1998 Rio Tapajós (AM) 0,28 -13,13 Roulet et al, 1998a Rio Madeira (AM) 9,49 -10,86 Maurice-Bourgoin et al, 2000 Rio Pedra Preta (AP) 2 ± 2 a 18 ± 21 b Fostier et al, 2000 Rio Mogi-Guaçu (SP) 1,14 -5,92 Tavares et al, 2003 Lagoas da bacia do rio Negro (AM) Tributários do rio Negro (AM) 4,9 -8,0 2,3 -15,0 Lagoa Óleo (SP) 1,3 ± 0,6 Fadini & Jardim, 2001 Rio Piracicaba (SP) <1,1 to 24,0 Fostier et al,op. cit.,p.19 Bacia do Alto Paranapanema <3,5 -9,23 (Hurley et al, 1998).…”
Section: áGuaunclassified
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