2007
DOI: 10.1590/s0100-06832007000500007
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Efeito da natureza do eletrólito e da força iônica na energia livre da reação de adsorção de níquel em solos

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Cited by 3 publications
(6 citation statements)
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References 23 publications
(34 reference statements)
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“…The adsorption reaction of metallic elements by the organic and inorganic surfaces of pure or isolated systems is usually spontaneous. The spontaneity of the Cd (Dias et al, 2003;, Cu (Silveira et al, 1999;Mouta et al, 2008), Ni (Iglesias et al, 2007), and Zn adsorption reaction by weathered soils was also characterized by negative free energy values. Negative ∆G values (Fig.…”
Section: Thermodynamic Parameters Of Ni Adsorption Reaction Separatiomentioning
confidence: 99%
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“…The adsorption reaction of metallic elements by the organic and inorganic surfaces of pure or isolated systems is usually spontaneous. The spontaneity of the Cd (Dias et al, 2003;, Cu (Silveira et al, 1999;Mouta et al, 2008), Ni (Iglesias et al, 2007), and Zn adsorption reaction by weathered soils was also characterized by negative free energy values. Negative ∆G values (Fig.…”
Section: Thermodynamic Parameters Of Ni Adsorption Reaction Separatiomentioning
confidence: 99%
“…This aspect is of particular interest for Ni adsorption, because there is no consensus yet on its retention mechanism by the soil. Nickel adsorption has been studied in pure systems, such as Fe, Al and Mn hydrated oxides (McKenzie, 1980;Beukes et al, 2000), clay minerals (Mattigod et al, 1979;Echeverría et al, 2003;Sen Gupta and Bhattacharyya, 2006) and organic matter (Mellis et al, 2004), and in complex systems such as the soil, under natural and agricultural conditions or with residue application (Camargo et al, 1989;Pombo et al, 1989;Mellis et al, 2004;Iglesias et al, 2007). However, sufficient data have not yet been gathered on Ni adsorption by weathered soils of the wet tropics to assure the implementation of efficient prevention techniques and remediation of soil contamination.…”
Section: Introductionmentioning
confidence: 99%
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“…Quanto maior a magnitude da energia livre, maior a força de reação do soluto pela superfície adsorvente (IGLESIAS et al, 2007 Caso este solo venha ser utilizado para prática agrícola e receber periodicamente cuidados agrícolas, haverá a necessidade do monitoramento de metais pesados, pois tais íons metálicos podem ser adicionados ao solo por meio da fertilização. O presente estudo foi importante para estabelecer os parâmetros da adsorção do Cádmio ao solo e concluir que este íon metálico quando em quantidades superiores à capacidade adsortiva do solo, está sujeito à lixiviação para cursos d'água ou à biodisponibilização às plantas.…”
Section: Relação Da Energia Livre (∆Gº) Com a Capacidade De Adsorção unclassified
“…Few studies have examined the behavior of heavy metals in acric soils (Iglesias;Alleoni, 2007). These soils cover approximately 170,000 ha of São Paulo State, Brazil, and consist of mostly iron (Fe) and aluminum (Al) oxides and kaolinite, which results from high silica loss.…”
Section: Introductionmentioning
confidence: 99%