Zinc adsorption–desorption isotherms: possible effects on the calcareous vertisol soils from Jordan
| Autor: | Muhanned A. Hararah, Farah Al-Nasir, Tayel El-Hasan, Ala’a H. Al-Muhtaseb |
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| Rok vydání: | 2011 |
| Předmět: |
Global and Planetary Change
Soil Science Langmuir adsorption model Geology Soil science Vertisol Soil type Pollution symbols.namesake Adsorption Environmental chemistry Desorption Soil water symbols Environmental Chemistry Freundlich equation Calcareous Earth-Surface Processes Water Science and Technology |
| Zdroj: | Environmental Earth Sciences. 65:2079-2085 |
| ISSN: | 1866-6299 1866-6280 |
| DOI: | 10.1007/s12665-011-1188-4 |
| Popis: | Calcareous vertisol soil is the dominant agricultural soil type and covers over 80% of the agricultural cultivated land in Jordan. This type of soil is characterized by its high pH and CaCO3 content, which made the heavy metals including Zn to be oxidized and adsorbed onto soil. Therefore, this type of soil is regarded as potentially Zn deficient. The effect of Zn initial concentration and average rainfall on the Zn adsorption and desorption from three types of calcareous vertisol soils has been examined. The amount of Zn adsorbed and desorbed at equilibrium increased with increasing Zn initial concentration for each of the three investigated soils. However, the percentage of adsorption and desorption decreased as the initial concentration of Zn ions increased. Moreover, results showed that rainfall has no influence on the behavior of Zn in the calcareous vertisol soils. Freundlich and Redlich-Peterson models provide the best representation of the experimental data, followed by the Langmuir model. |
| Databáze: | OpenAIRE |
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