Bibliographic Citation
| Document | For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field. For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability. |
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| Title | Soluble organics from forest litter and their role in metal dissolution |
| Creator/Author | Pohlman, A.A. ; McColl, J.G. |
| Publication Date | 1988 Jan 01 |
| OSTI Identifier | OSTI ID: 6999485 |
| Other Number(s) | CODEN: SSSJD |
| Resource Type | Journal Article |
| Resource Relation | Soil Sci. Soc. Am. J. ; Vol/Issue: 52:1 |
| Research Org | Univ. of California, Berkeley (USA) |
| Subject | 510100 -- Environment, Terrestrial-- Basic Studies-- (-1989); ALUMINIUM-- SOLUBILITY;FOREST LITTER-- ENVIRONMENTAL EFFECTS;FOREST LITTER-- ORGANIC MATTER;IRON-- SOLUBILITY;MAGNESIUM-- SOLUBILITY;MANGANESE-- SOLUBILITY;ORGANIC MATTER-- SOLUBILITY; BENCH-SCALE EXPERIMENTS;CHELATES;FRACTIONATION;GALLIC ACID;LEACHING;MALIC ACID;OXALIC ACID;SOILS |
| Related Subject | ALKALINE EARTH METALS;BIOLOGICAL MATERIALS;CARBOXYLIC ACIDS;COMPLEXES;DICARBOXYLIC ACIDS;DISSOLUTION;ELEMENTS;HYDROXY ACIDS;MATERIALS;METALS;ORGANIC ACIDS;ORGANIC COMPOUNDS;SEPARATION PROCESSES;TRANSITION ELEMENTS |
| Description/Abstract | The effect of soluble organics from O/sub 1/ and O/sub 2/ litter of seven overstory and understory forest species on dissolution of Al, Fe, Mg, and Mn from two forest soils was investigated.^Litter was leached in absence and presence of soil under controlled laboratory conditions, and the leachates were analyzed.^In absence of soil, different litters varied widely in their ability to release dissolved organic carbon (DOC) and metals.^No significant correlations between photons consumed and DOC, Al, Mg, and Mn released from litter were found.^In the presence of soils there was a direct relationship between organics released from litters and Al and Fe dissolved from soils but not for the other two metals.^The predominant class of organics found in all litter leachates were acids and neutrals, and their contents were directly proportional to total organics dissolved.^Thus, hydrophobic plus hydrophilic acid, base, and neutral content of little leachates corresponded to mean values of 49.6, 8.8, and 41.1%, respectively, for all litters.^Total acid content was composed of 30.6% hydrophobics and 18.5% hydrophilics.^A good correlation was obtained between soil dissolved Al and hydrophobic acids, Al and Fe, and hydrophilic acids.^Polyphenolics constituted from 10 to 23% of the DOC content of both O/sub 1/ and O/sub 2/ litter extracts.^Polyphenolic content was highly correlated with dissolved Al and with dissolved Fe.^Five aliphatic acids and six aromatic acids were detected and quantified.^Free-organic acids with high chelating abilities such as oxalic, malic, gallic, and protocatechuric acids made up 60 to 80% of the identified free-acid content of six litter leacheates.^Significant correlation was obtained between total free-organic acid content and dissolved Al and Fe from soils. |
| Country of Publication | United States |
| Language | English |
| Format | Pages: 265-272 |
| System Entry Date | 2001 May 13 |
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