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Volume 2, 2007 - Number 1
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PHOSPHATE ADSORPTION ON SOILS IN THE GURGHIU
AND HARGHITA MOUNTAINS, ROMANIA
György FÜLEKY* & Sámuel JAKAB**
*Szent István University, 2103 Gödöllő, Páter Károly u. 1., Hungary fuleky.gyorgy@mkk.szie.hu **Sapientia EMT, Tg. Mureş, Romania jakab.bocskai@rdslink.ro PHOSPHATE ADSORPTION ON SOILS IN THE GURGHIU AND HARGHITA MOUNTAINS, ROMANIA Full text
Abstract:
Phosphate adsorption on soils in the Gurghiu and Harghita Mts., Romania. Ten soil profiles from the Mezőhavas region of the Gurghiu Mountains and ten from
the Vf. Madarasi Tető region of the Harghita Mountains were investigated by taking samples
from the various horizons of each profile, leading to a series of 39 soil samples from Gurghiu
and 37 from Harghita. In the course of the work the rate of phosphate adsorption on the soils
was determined, and correlations were sought between chemical soil properties and the rate of
adsorption. The maximum adsorption rate was calculated with the help of the Langmuir
isotherm, and numerous other soil properties were examined in order to determine which
parameters were correlated with the rate of phosphate adsorption. Among the soil properties,
the oxalate-soluble Al and Fe contents, i.e. the non-crystalline Al and Fe oxyhydroxides, proved
to be in close, positive, approximately linear correlation with the phosphate adsorption rate for
both groups of soils. In addition, phosphate adsorption exhibited a close, negative, exponential
correlation with the quantity of exchangeable cations, and a positive linear correlation with the
pyrophosphate-soluble Al, i.e. that bound to organic matter. |
(c) 2006 - 2024 , Publisher-Asociația Carpatică de Mediu și Științele Pământului (Carpathian Association of Environment and Earth Sciences) |