Abstract
The effects of mineral acid deposition on chemical properties of leachates of three granitic forest soils and pine O1-litter were investigated under controlled laboratory conditions. Of the array of organic acids released from litter and SOM as detected by HPLC analysis, nine compounds were identified and six compounds have been quantified. Organic acids possessing certain functional group arrangements, such as di- and tri-carboxylic acids containing β-hydroxyl groups, and phenolic acids with ortho-hydroxyls were about three to ten times faster in dissolving Al than similar organics with other functional group combinations or mineral acids at comparable pH and concentration levels. There was little correlation between the initial pH of chelating organic acid input solution and rate of metal dissolution. On a mole metal-leached per gram basis, dissolution of metals from Shaver soil followed the order Al>Mn>Fe in both organic and mineral acids.
Similar content being viewed by others
References
Cronan, C. S. and Schofield, C. L.:1979, ‘Aluminum Leaching Response to Acid Precipitation: Effects on High Elevation Watersheds in the North-East’, Science 204, 304.
Cronan, C. S. and Aiken, G. R.: 1985, ‘Chemistry and Transport of Soluble Humic Substances in Forested Watershed of the Adirondack Park, New York’, Geochim. et Cosmochim. Acta 49, 1697.
DeWalde, D. R., Ribblett, G. C., Helvey, J. D., and Kochenderfer, J.: 1985, ‘Laboratory Investigation of Leachate Chemistry from Six Appalachian Forest Floor Types, Subjected to Simulated Acid Rain’, J. Environ. Qual. 14, 234.
Driscoll, C. T., van Breeman, N., and Mulder, S.: 1985, ‘Aluminum Chemistry in a Forested Spodosol’, Soil Sci. Soc. Am. J. 49, 437.
Holmgren, G. G. S., Juve, L., and Geschwender, R. C.: 1977, ‘A Mechanically Controlled Variable Rate Leaching Device’, Soil Sci. Soc. Am. J. 41, 1207.
Iskander, I. K. and Syers, J. K.: 1972, ‘Metal-Complex Formation by Lichen Components, J. Soil Sci. 23, 254.
Jayman, T. C. Z. and Sivasubramanian, S.: 1974, ‘The Use of Ascorbic Acid to Eliminate Interference from Iron in the Aluminon Method for Determining Aluminum in Plant and Soil Extracts’, Analyst 99, 256.
Johnson, N. M., Driscoll, C. T., Eaton, J. S., Likens, G. E., and McDowell, W. H.: 1981, ‘Acid Rain, Dissolved Aluminum and Chemical Weathering at the Hubbard Brook Experimental Forest, New Hampshire’, Geochim. Cosmochim. Acta 45, 1421.
Johnson, D. W., Richter, D. D., van Miegroet, H., and Cole, D. W.: 1983, ‘Contributions of Acid Deposition and Natural Processes to Cation Leaching from Forest Soils: A Review’, J. Air Pollution Control Assoc. 33, 1036.
Martell, A. E. and Calvin, M.: 1952, Chemistry of the Metal Chelate Compounds., Prentice-Hall, Inc., N. Y.
Pohlman, A. A. and McColl, J. G.:1985, ‘Kinetics of Metal Dissolution from Forest Soils by Soluble Organic Acids’, J. Env. Qual. 15, 86.
Razzaghe-Karimi, J. and Robert, M.: 1975, ‘Alteration des Micas et Geochimie de L'aluminum: Role de la Configuration de la Molecule Organique sur la Complexation’, C. R. Acad. Sci., Paris 2800, 2645.
Schnitzer, M. and Kodama, H.: 1976, ‘The Dissolution of Micas by Fulvic Acid’, Geoderma 15, 381.
Schalascha, E. B., Appelt, H. and Schatz, A.: 1967, ‘Chelation as a Weathering Mechanism:I. Effect of Complexing Agents in the Solubilization of Iron from Minerals and Gianodiorite’, Geochim. Cosmochim. Acta 31, 587.
Toy, A. D., Smith, T. D., and Pilbrow, S. R.: 1973, ‘Al-27 Nuclear Magnetic Resonance in Aqueous Solutions of its Chelates with Hydroxy-Carboxylic Acids’, Aust. J. Chem. 27, 1889.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
McColl, J.G., Pohlman, A.A. Soluble organic acids and their chelating influence on Al and other metal dissolution from forest soils. Water, Air, and Soil Pollution 31, 917–927 (1986). https://doi.org/10.1007/BF00284237
Issue Date:
DOI: https://doi.org/10.1007/BF00284237