Isotermas de adsorción de fósforo en sedimentos del estuario de Maracaibo (Lago de Maracaibo)
Eight sediment samples from Maracaibo's estuary (Lago de Maracaibo) were assessed for their capacity to sorb different amounts of added phosphate, the results were studied according with the Langmuir, Freundlich and Temkin adsorption models. The experimental information adjusted Freundlich isotherm in the whole range of concentration used (0-250 ppm). Langmuir model, although convenient at lower concentration, desviate from linearity at higher P level used, presumably due to inter actions occurring among the highly charged orthophosphate already sorbed Temkin's isotherm do not describe as well the interrelationships between surface-solution as previously found in agricultural soils. The time of equilibrium was found to be dependent on reactive surfaces, particularly those related to amorphous forms of aluminium.
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Format: | Artículo biblioteca |
Language: | Spanish / Castilian |
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Instituto Interamericano de Cooperación para la Agricultura (IICA)
1984-07
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Subjects: | FOSFORO, SEDIMENTO, ESTUARIOS, ADSORCIÓN, Sede Central, |
Online Access: | https://repositorio.catie.ac.cr/handle/11554/11934 |
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dig-catie-11554-119342022-08-30T16:42:31Z Isotermas de adsorción de fósforo en sedimentos del estuario de Maracaibo (Lago de Maracaibo) Phosphate sorption isotherms in sediments of Maracaibo's Estuary ("Maracaibo Lake") López-Hernández, D Rotondo, F Herrera, T FOSFORO SEDIMENTO ESTUARIOS ADSORCIÓN Sede Central Eight sediment samples from Maracaibo's estuary (Lago de Maracaibo) were assessed for their capacity to sorb different amounts of added phosphate, the results were studied according with the Langmuir, Freundlich and Temkin adsorption models. The experimental information adjusted Freundlich isotherm in the whole range of concentration used (0-250 ppm). Langmuir model, although convenient at lower concentration, desviate from linearity at higher P level used, presumably due to inter actions occurring among the highly charged orthophosphate already sorbed Temkin's isotherm do not describe as well the interrelationships between surface-solution as previously found in agricultural soils. The time of equilibrium was found to be dependent on reactive surfaces, particularly those related to amorphous forms of aluminium. Ocho muestras de sedimentos del estuario de Maracaibo (Lago de Maracaibo) fueron evaluadas por su capacidad de sorber diferentes cantidades de fosfato añadido, los resultados fueron estudiados de acuerdo con los modelos de adsorción de Langmuir, Freundlich y Temkin. La información experimental ajustó la isoterma de Freundlich en todo el rango de concentración utilizado (0-250 ppm). El modelo de Langmuir, aunque es conveniente a bajas concentraciones, se desvía de la linealidad a los niveles de P más altos utilizados, presumiblemente debido a las interacciones que ocurren entre el ortofosfato altamente cargado ya sorbido La isoterma de Temkin no describe tan bien las interrelaciones entre la superficie-solución como las encontradas previamente en los suelos agrícolas. Se encontró que el tiempo de equilibrio dependía de las superficies reactivas, en particular las relacionadas con las formas amorfas del aluminio. 2022-08-29T21:34:40Z 2022-08-29T21:34:40Z 1984-07 Artículo https://repositorio.catie.ac.cr/handle/11554/11934 openAccess es Turrialba; Vol. 34, no. 3 6 páginas application/pdf Instituto Interamericano de Cooperación para la Agricultura (IICA) |
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Spanish / Castilian |
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FOSFORO SEDIMENTO ESTUARIOS ADSORCIÓN Sede Central FOSFORO SEDIMENTO ESTUARIOS ADSORCIÓN Sede Central |
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FOSFORO SEDIMENTO ESTUARIOS ADSORCIÓN Sede Central FOSFORO SEDIMENTO ESTUARIOS ADSORCIÓN Sede Central López-Hernández, D Rotondo, F Herrera, T Isotermas de adsorción de fósforo en sedimentos del estuario de Maracaibo (Lago de Maracaibo) |
description |
Eight sediment samples from Maracaibo's estuary (Lago de Maracaibo) were assessed for their capacity to sorb different amounts of added phosphate, the results were studied according with the Langmuir, Freundlich and Temkin adsorption models. The experimental information adjusted Freundlich isotherm in the whole range of concentration used (0-250 ppm). Langmuir model, although convenient at lower concentration, desviate from linearity at higher P level used, presumably due to inter actions occurring among the highly charged orthophosphate already sorbed Temkin's isotherm do not describe as well the interrelationships between surface-solution as previously found in agricultural soils. The time of equilibrium was found to be dependent on reactive surfaces, particularly those related to amorphous forms of aluminium. |
format |
Artículo |
topic_facet |
FOSFORO SEDIMENTO ESTUARIOS ADSORCIÓN Sede Central |
author |
López-Hernández, D Rotondo, F Herrera, T |
author_facet |
López-Hernández, D Rotondo, F Herrera, T |
author_sort |
López-Hernández, D |
title |
Isotermas de adsorción de fósforo en sedimentos del estuario de Maracaibo (Lago de Maracaibo) |
title_short |
Isotermas de adsorción de fósforo en sedimentos del estuario de Maracaibo (Lago de Maracaibo) |
title_full |
Isotermas de adsorción de fósforo en sedimentos del estuario de Maracaibo (Lago de Maracaibo) |
title_fullStr |
Isotermas de adsorción de fósforo en sedimentos del estuario de Maracaibo (Lago de Maracaibo) |
title_full_unstemmed |
Isotermas de adsorción de fósforo en sedimentos del estuario de Maracaibo (Lago de Maracaibo) |
title_sort |
isotermas de adsorción de fósforo en sedimentos del estuario de maracaibo (lago de maracaibo) |
publisher |
Instituto Interamericano de Cooperación para la Agricultura (IICA) |
publishDate |
1984-07 |
url |
https://repositorio.catie.ac.cr/handle/11554/11934 |
work_keys_str_mv |
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