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| Titel: |
Phosphorus adsorption characteristics in paraiba state argisols, plinthite soils and cambisols, Brazil |
| Auteur: |
Lucia Helena Garófalo Chaves Iêde de Brito Chaves Ana Kelliane Silva de Nascimento Antonio Evami Cavalcante Sousa |
| Verschenen in: |
Engenharia ambiental |
| Paginering: | Jaargang 6 (2009) nr. 2 pagina's 130-139 |
| Jaar: |
2009 |
| Inhoud: |
The objective of this paper was to determine the phosphorus (P) adsorption characteristics using the Langmuir isotherm and its relation with some chemical and physical properties of soils. The study was carried out in laboratory of Universidade Federal de Campina Grande, Paraiba State (PB), Brazil, with Argisols (PVAd; PVAe; PVd), two Plinthite soil (FTd-1 e FTd-2) and three Cambisols (CXbd-1; CXbd-2; CXbe) surface (0-20 cm) samples from Paraíba State. In these soils, remaining phosphorus was determined with a solution containing 60 mg L-1 of P. The phosphorus doses used were defined based on the remaining P values and corresponded to 10; 30; 50; 100 e 150 mg L-1 of P. To available the maximum P adsorption capacity (MPAC), the data of adsorbed P and the concentrations of equilibrium solutions were adjusted to Langmuir isotherm. Langmuir model offered a good fit for the experimental data. The highest MPAC value was observed in PVd soil. The CMAP and adsorption energy were negatively correlated with base saturation. The attributes closest correlated with soil of the same class MPAC were soil clay and organic matter content and pH value. Available P influenced the adsorption of the element in PVAe.Key-words: Langmuir, adsorption isotherm. |
| Uitgever: |
Environmental Engineering Course / UNIPINHAL (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 70 van 93 gevonden artikelen
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