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Titolo:
Controlling mechanisms of aluminium in soil solution - an evaluation of 180 podzolic forest soils
Autore:
van Hees, P; Lundstrom, U; Danielsson, R; Nyberg, L;
Indirizzi:
Mid Sweden Univ, Dept Chem & Proc Technol, S-85170 Sundsvall, Sweden Mid Sweden Univ Sundsvall Sweden S-85170 hnol, S-85170 Sundsvall, Sweden Uppsala Univ, Dept Analyt Chem, S-75121 Uppsala, Sweden Uppsala Univ Uppsala Sweden S-75121 Analyt Chem, S-75121 Uppsala, Sweden Univ Karlstad, Dept Environm Sci, S-65188 Karlstad, Sweden Univ Karlstad Karlstad Sweden S-65188 ronm Sci, S-65188 Karlstad, Sweden
Titolo Testata:
CHEMOSPHERE
fascicolo: 6-7, volume: 45, anno: 2001,
pagine: 1091 - 1101
SICI:
0045-6535(200111)45:6-7<1091:CMOAIS>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLUTION CHEMISTRY; SOLUBILITY CHARACTERISTICS; ACID DEPOSITION; ORGANIC-MATTER; SPECIATION; HORIZONS; ACIDIFICATION; EQUILIBRIA; STABILITY; COMPLEXES;
Keywords:
aluminium; soil solution; forest soil; solubility control;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: van Hees, P Mid Sweden Univ, Dept Chem & Proc Technol, S-85170 Sundsvall, Sweden Mid Sweden Univ Sundsvall Sweden S-85170 0 Sundsvall, Sweden
Citazione:
P. van Hees et al., "Controlling mechanisms of aluminium in soil solution - an evaluation of 180 podzolic forest soils", CHEMOSPHERE, 45(6-7), 2001, pp. 1091-1101

Abstract

To monitor the level of soil acidification in the county of Varmland in the middle west of Sweden 180 podzolic forest soils were investigated. Soil solutions from four horizons were obtained by centrifugation and the soil was sampled for a determination of the exchangeable pool by extraction. The concentrations of inorganic At and its fraction of the total Al in solution were greater in the south of the county (up to 50%). The factors influencing the total Al and free inorganic Al3+ in the soil solutions were evaluated. Saturation indices (ST) for five different mineral phases were calculatedbut none implied equilibrium conditions. The relationships between pAl(3+)and pH (in the pH range 4-6.2) gave slopes of about 1, which indicated that ion exchange/complexation reactions may be important for determining the Al3+ concentration in the B and C horizons. In the E horizon solutions complexation with soluble organic acids seemed to be the major factor which influenced the Al3+ activity, The influence of organic matter on At solubilitywas supported by partial least square (PLS) regressions. (C) 2001 ElsevierScience Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 15:23:07