2009
DOI: 10.1590/s0100-06832009000500004
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Composição química da solução do solo nas diferentes classes de poro do solo

Abstract: RESUMOA composição química da solução do solo pode ser considerada indicadora da presença de nutrientes ou contaminantes no solo. Para analisar a variação dessa composição nos poros do solo, utilizou-se um sistema de extração sequencial da solução do solo em diferentes classes de diâmetro de poro. Colunas de PVC foram construídas e preenchidas com terra fina seca ao ar de um Cambissolo Háplico distrófico, e irrigadas com água destilada (T1), efluente de estação de tratamento de esgoto sanitário EETE (T2) e EET… Show more

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Cited by 7 publications
(7 citation statements)
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“…Therefore, for this group of soils, it is plausible to assume that the activity of Al 3+ in the solution was controlled by the amorphous polymers from EHE and HEV that maintained the equilibrium of this species in the solution, restraining its toxic potential, as also verified by Dahlgren & Walker (1993) despite the high activity of the basic cations in the solution of these soils (Table 3). Furthermore, the intense agitation of the samples for soil solution simulation (soil:solution extraction in a Limestone doses x H + Al (t ha -1 ) AC9 TDM = 17.55 -12.37x + 13.13x 2 r 2 = 0.76 PE TDM = 1.41 + 14.13x -6.83x 2 r 2 = 0.99 RS TDM = 16.64 + 19.93x -18.83x 2 r 2 = 0.99 BR TDM = 1.33 + 41.03x -26.98x 2 r 2 = 0.98 CB TDM = 5.29 + 31.39x -26.56x 2 r 2 = 0.99 9/10 1:1 ratio) may have destroyed the natural arrangement of the soil:solution porous system (Gloaguen et al, 2009), favoring the dissolution of amorphous species of Al, what may have contributed to the solubilization and increase of the concentration of Al 3+ and also of the cationic and anionic species in their solution.…”
Section: Relationship Between Cations and Anions Activity With Aluminmentioning
confidence: 99%
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“…Therefore, for this group of soils, it is plausible to assume that the activity of Al 3+ in the solution was controlled by the amorphous polymers from EHE and HEV that maintained the equilibrium of this species in the solution, restraining its toxic potential, as also verified by Dahlgren & Walker (1993) despite the high activity of the basic cations in the solution of these soils (Table 3). Furthermore, the intense agitation of the samples for soil solution simulation (soil:solution extraction in a Limestone doses x H + Al (t ha -1 ) AC9 TDM = 17.55 -12.37x + 13.13x 2 r 2 = 0.76 PE TDM = 1.41 + 14.13x -6.83x 2 r 2 = 0.99 RS TDM = 16.64 + 19.93x -18.83x 2 r 2 = 0.99 BR TDM = 1.33 + 41.03x -26.98x 2 r 2 = 0.98 CB TDM = 5.29 + 31.39x -26.56x 2 r 2 = 0.99 9/10 1:1 ratio) may have destroyed the natural arrangement of the soil:solution porous system (Gloaguen et al, 2009), favoring the dissolution of amorphous species of Al, what may have contributed to the solubilization and increase of the concentration of Al 3+ and also of the cationic and anionic species in their solution.…”
Section: Relationship Between Cations and Anions Activity With Aluminmentioning
confidence: 99%
“…Although knowledge of the chemical composition of the soil solution is important, this has only been determined in scientific studies due to methodological difficulties (Cancés et al, 2003). This difficulty arises from changes in the chemical composition of ions in the solution as a function of the acid-base balance, ionic complexation, precipitation and dissolution of oxides, oxidation, reduction and exchange of cations, time of the year, soil moisture, variation between the equilibrium existing between the components of the solution and the other phases of the soil, as well as their interaction with the soil, with microfauna and microflora that alter their composition along the soil profile (Zambrosi et al, 2008;Gloaguen et al, 2009). In addition to these factors, the liming used to correct soil acidity also influences the composition of the soil solution due to the rapid equilibrium of the solid with the liquid phase, changing the dynamics of ions in solution (Spera et al, 2014).…”
Section: Introductionmentioning
confidence: 99%
“…A variação composicional, em função da porosidade do solo, ocorre por vários fatores, tais como superfície específica, atividade da fração sólida (argila > silte > areia), grau de intemperismo dos minerais, matéria orgânica em suspensão na água gravitacional, diferença entre a taxa rápida de liberação e de retenção das espécies químicas (absorção, adsorção e atividade microbiana) e os processos mais lentos de difusão e de convecção entre os micro e macroporos, resultando num gradiente de concentração. A soma dos fenômenos deveria resultar numa distribuição complexa e altamente variável dos íons na porosidade do solo (GLOAGUEN et al, 2009). As taxas de infiltração de água no solo são diretamente afetadas pela quantidade e a maneira como os poros estão distribuídos no solo.…”
Section: Porosidade Do Solounclassified
“…O método comumente utilizado consta da agitação de certa quantidade de solo com uma solução extratora, em dada proporção e por determinado tempo. Várias críticas têm sido impostas a este procedimento, a principal delas por envolver a completa destruição do arranjo natural do sistema poroso solo-solução do solo (GLOAGUEN et al, 2009).…”
Section: Introductionunclassified