1998
DOI: 10.1006/jcis.1998.5549
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The Influence of Temperature on the Adsorption of Cadmium(II) and Cobalt(II) on Kaolinite

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Cited by 163 publications
(157 citation statements)
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“…Ion exchange on sites having permanent negative charges and complexation of Co 2+ to hydroxyl-edge groups of kaolinite were reported in earlier studies [8,9]. Another sorption mechanism that can be of importance is binding to coordinatively unsaturated O 2− groups that are exposed at the clay surface and that can complete their coordination sphere by holding the sorbed ion (M n+ ) as -O x M groups.…”
Section: Resultsmentioning
confidence: 76%
“…Ion exchange on sites having permanent negative charges and complexation of Co 2+ to hydroxyl-edge groups of kaolinite were reported in earlier studies [8,9]. Another sorption mechanism that can be of importance is binding to coordinatively unsaturated O 2− groups that are exposed at the clay surface and that can complete their coordination sphere by holding the sorbed ion (M n+ ) as -O x M groups.…”
Section: Resultsmentioning
confidence: 76%
“…Angove et al [36] studied the influence of temperature (283 to 343 K) on adsorption of Co(II) on kaolinite and reported that the experimental data fit the Langmuir model at all temperatures. Many other authors reported results supporting the assumption that a Langmuir monolayer adsorption isotherm describes heavy metal adsorption on clay [37,38].…”
Section: Effect Of Temperature and Bentonite Dose On The Values Of Lamentioning
confidence: 99%
“…3,[7][8][9]40 Os resultados dos cálculos das frações molares das espécies de Pb(II), efetuados a partir das substituições das concentrações finais de íons H + medidas nos processos de adsorção nas Equações 10 a 12, indicam que a espécie de Pb(II) predominante em solução é a de Pb 2+ e a menos expressiva é a Pb(OH) 2 …”
Section: Distribuição Do íOn Pb (Ii) Nas Interfaces Caulinitas-soluçõesunclassified
“…O Pb 2+ , assim como outros cátions metálicos M 2+ , pode ser adsorvido no sitio de carga negativa permanente na face tetraédrica, indicado como X -ou SiO -, e nos sítios de cargas variáveis nas bordas dos cristais e na face octaédrica da caulinita, dependentes do pH. 3,[7][8][9]40 Nos sítios de carga negativa permanente (face tetraédrica) os modelos de formação de complexos superficiais são indicados pelas reações: 7,8 SiO -+ M 2+ (SiO) 2 M K = 3,55 x 10 3…”
Section: Química Superficial Do Pb(ii) Nas Interfaces Caulinitas-soluunclassified
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