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Aluminum Studies: II. The Extraction of Aluminum from Some Florida Soils
Author(s) -
Yuan T. L.,
Fiskell J. G. A.
Publication year - 1959
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1959.03615995002300030015x
Subject(s) - triethanolamine , chemistry , reagent , hydroxide , loam , extraction (chemistry) , fractionation , phosphate , fluoride , soil water , inorganic chemistry , nuclear chemistry , environmental chemistry , chromatography , geology , organic chemistry , analytical chemistry (journal) , soil science
A study of soil Al extraction by various chemical reagents has been conducted. Using N NH 4 OAc solutions buffered at six different pH levels, it was found that the lower the pH of the solution the more Al was extracted. Neutral normal solutions of BaCl 2 , CaCl 2 , KCl, NH 4 Cl, and a solution of BaCl 2 in triethanolamine buffered at pH 8.1 extracted more Al than neutral N NH 4 OAc. Among neutral salts the bivalent cations seemed to be more efficient. BaCl 2 in triethanolamine extracted much more Al than any of the neutral salts, probably due to the complexing capacity of triethanolamine. Three alkaline reagents—NaOH, NaF, and Na pyrophosphate—commonly used for organic matter extraction, were also tested. Each of these reagents extracted much more Al from sandy and sandy loam soils than the previous reagent group. This Al was believed to originate from various Al compounds in soils including aluminum hydroxide and phosphate and even aluminum silicates. In order to investigate the relationship between Al and phosphate release, a P‐fractionation procedure was used on a Red Bay fine sandy loam. In the extract of each fraction a high amount of Al was found, except with NH 4 Cl. Al hydroxide seemed to be the main source contributing to the high Al value obtained from alkalis and fluoride extractions.