Open AccessRelationship Between Exchangeable Alumunium and Phosphorus Sorption Parameters of Indonesian Acid Soils
Author(s) -
Arief Hartono
Publication year - 2004
Publication title -
jurnal ilmu tanah dan lingkungan/jurnal ilmu tanah dan lingkungan (journal of soil science and environment)
Language(s) - English
Resource type - Journals
eISSN - 2549-2853
pISSN - 1410-7333
DOI - 10.29244/jitl.6.2.70-74
Subject(s) - sorption , soil water , chemistry , phosphorus , adsorption , langmuir adsorption model , langmuir , langmuir equation , environmental chemistry , geology , soil science , organic chemistry
In acid soils, phosphorus (P) sorption is generally attributed to hydrous oxides of Fe and Aluminum (AI) particularly intropical soils with low pH. However, reports concerning the role of exchangeable AI in P sorption mechanism are very liltle.Phosphorus (P) sorption isotherms were studied in fifteen acid upland soils containing different amount of exchangeable AI. Psorption characteristics were satisfactorily described by the Langmuir equation. which was used to determine P sorptionmaxima and bonding energies, with r values ranging from 0.97 to 0.99. The soils varied widely in their capacities to sorb P.P sorption maxima rangedfrom 303 to 1429 mg kg-I (mean 627 mg kg-I) and bonding energies from 0.65 to 8.00 L mtl (mean 2.39 L mg-I). Exchangeable AI was found not correlated with P sorption maxima (r = -0.11) but significantly correlated with P bonding energies (r = 0.68**). This was clearly shown by clayey soils from Java and Sumatra but not in sandy soils fromKalimantan. The results suggested that in general. reaction of exchangeable AI with P increased P bonding energy butexchangeable AI was not the main component in P sorption maximum