This study was conducted to determine phosphorus
sorption characteristics of five soils from contrasting parent materials in south-eastern
Nigeria. The soils were collected from Ikom (basalt), Akamkpa (basement complex),
Bende (shale), Amaeke (sand stone) and Umudike (coastal plain sand). The
standard P requirements for the soils were calibrated from the sorption curves,
and the values were very low ranging from 11.1 mg·kg﹣1 in
Bende to 60.2 mg·kg﹣1 in Ikom. The P maximum
sorption capacity determined by the Freundlich and Langmuir models varied with
the locations, and ranged from 65.7 mg·kg﹣1 in Akamkpa to 516 mg·kg﹣1 in
Bende for the Freundlich model and from 231 mg·kg﹣1 in
Akamkpa to 369 mg·kg﹣1 in Bende for the Langmuir
model. Similarly the P maximum buffering capacity was determined by using the
two models. The values varied from 993 mg·kg﹣1 in
Amaeke to 1180 mg·kg﹣1 in Akamkpa with a mean of 1087
mg·kg﹣1. The
highest bonding energy of P was in Akamkpa with a mean value of 6.05 ml/g and
lowest was in Bende with a mean value of 0.76 ml/g. From this study, the P
sorption data of the soils conformed better with the Freundlich model than the
Langmuir model. Freundlich model is therefore recommended for the soils.
Cite this paper
Umoh, F. O. , Osodeke, V. E. , Edem, I. D. and Effiong, G. S. (2014). Application of Langmuir and Freundlich Models in Phosphate Sorption Studies in Soil of Contrasting Parent Materials in South-Eastern Nigeria. Open Access Library Journal, 1, e989. doi: http://dx.doi.org/10.4236/oalib.1100989.
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