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Effects of dissolved organic carbon and sulfate on aluminum mobilization in forest soil columns

Effects of dissolved organic carbon and sulfate on aluminum mobilization in forest soil columns

Soil Science Society of America Journal 50(6): 1576-1578

A column study was conducted using a Cecil soil that was leached with various combinations of .**GRAPHIC**. and dissolved organic carbon (DOC), with the eluent pH adjusted to 4.6. Aluminum mobilization increased in the order .**GRAPHIC**. < DOC + .**GRAPHIC**. < DOC with Al being present primarily as Al in the 1000 to 2500 molecular aggregate range (MAR). The addition of .**GRAPHIC**. to the soil resulted in a reduction in DOC in the < 1000 (MAR) with a corresponding increase in the 1000 to 2500 and 2500 to 5000 (MAR). Subsequent leaching with .**GRAPHIC**. after DOC treatment reduced Al mobilization. The number of pore volumes of eluent required for .**GRAPHIC**. breakthrough decreased with elevated DOC levels in solution. Preliminary results suggest that .**GRAPHIC**. and organic species < 1000 (MAR) compete for similar adsorption sites.

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Accession: 001580540

Download citation: RISBibTeXText

DOI: 10.2136/sssaj1986.03615995005000060038x

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