Aluminum precipitation and dissolution rates in Spodosol Bs horizons in the northeastern USA

R. A. Dahlgren, C. T. Driscoll, D. C. McAvoy

Research output: Contribution to journalArticle

71 Scopus citations

Abstract

The kinetics of Al precipitation/dissolution reactions in Spodosol Bs horizons from sites at Hubbard Brook, NH and Bear Brook, ME were examined. A mechanical vacuum extractor was employed to draw solutions through soil columns at solution/soil residence times between 0.3 and 100 h. Equilibrium was approached from conditions of both undersaturation and oversaturation to determine if a particular soil mineral controlled Al3+ activity. Column, leachates were analyzed for major solutes followed by chemical speciation and calculation of mineral saturation indices. Our results showed that apparent equilibrium with respect to Al(OH)3 solubility was readily obtained from both conditions of undersaturation and oversaturation within 0.3 h. The laboratory results compared favourably with saturation indices calculated from stream and soil solutions at these sites. -from Authors

Original languageEnglish (US)
Pages (from-to)1045-1052
Number of pages8
JournalSoil Science Society of America Journal
Volume53
Issue number4
DOIs
StatePublished - Jan 1 1989

ASJC Scopus subject areas

  • Soil Science

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