Avaliação do nível da vulnerabilidade do solo devido à presença de termelétrica a carvão (Figueira, PR- Brasil)


Autoria(s): Flues,Marlene; Hama,Patrícia; Fornaro,Adalgiza
Data(s)

01/08/2003

Resumo

Rainwater samples were analyzed during a one-year period (June 1999 - June 2000) and presented concentration of pH = 4.9 (volume weight mean). The ions concentrations results showed a high sulfate concentration (35 µmol L-1), followed by the cations concentration of sodium, calcium and ammonium (35, 16 and 30 µmol L-1, respectively). Due to the great contribution of these cations in the sulfate neutralization action, the rainwater of this region had only a light acid characteristic. The soil characteristic was acid and the bioavailable concentration of the alkaline cations (Ca, Mg and K) presented high calcium concentrations (1001 ± 357 mg kg-1) compared with the other cations. The determination of soil sensitivity to acid rain was calculated by the ratio BC/Al3+ (BC = Ca2+ + Mg2+ + K+) and presented the average value of 5.1 ± 3.3. This preliminary evaluation of soil susceptibility by the ratio BC/Al3+ showed that the local soil and vegetation type (tropical Savannah) were sensitive to acid deposition. The long term of this impacting condition (acid rain, high sulfate deposition) could be harmful to the soil and vegetation quality.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422003000400006

Idioma(s)

pt

Publicador

Sociedade Brasileira de Química

Fonte

Química Nova v.26 n.4 2003

Palavras-Chave #soil #critical load #acid rain
Tipo

journal article