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The Changes of Specific Surface Area of Soils after Peroxidation and Its Implication for the Calculation of Critical toads of Soil Acidification  

Yeo, Sang-Jin (School of Earth and Environmental Sciences, Seoul National University)
Lee, Bumhan (School of Earth and Environmental Sciences, Seoul National University)
Soyoung Sung (School of Earth and Environmental Sciences, Seoul National University)
Kim, Soo-Jin (School of Earth and Environmental Sciences, Seoul National University)
Publication Information
Journal of the Mineralogical Society of Korea / v.15, no.3, 2002 , pp. 195-204 More about this Journal
Abstract
Mineralogy and the exposed surface area are two of the most important factors controlling dissolution and weathering rates of soils. The mixture of inorganic and organic materials of various size distributions and structures that constitute soils makes the calculation of weathering rates difficult. The surface area of soil minerals plays an important role in most of programs for calculating the weathering rates and critical loads. The Brunauer-Emmett-Teller (BET) measurement is recommended for the measurement of specific surface area. However, BET values measured without organic matter removal are in fact those far all the N2-adsorbed surface areas, including the surfaces covered and aggregated with organisms. Surfaces occupied by organisms are assumed to be more reactive to weathering by organic activities. Therefore, the BET surface area difference before and after organic removal depicts the area occupied by organisms. The present study shows that the BET values after organic matter removal using $H_2$O$_2$ are larger than those without removal by 1.68~4.87 $m^2$/g. This implies that BET measurement without organic removal excludes the reactive area occupied by organisms and that the area occupied by organisms in soils is much larger than expected. It is suggested that specific surface area measurement for calculating weathering rates of mineral soils should be made before and after organic matter removal. The results of a column experiment are presented to demonstrate the potential retarding influence that this organic matter may have on mineral dissolution and weathering.
Keywords
specific surface area; organic matter removal; weathering rates; potential retarding influence;
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  • Reference
1 Anbeek C. (1992) Surface roughness of minerals and implication for disso lution studies. Geochim. Cosmochim. Acta, 56, 1461-1469.
2 Douglas, L.A. and Fiessinger, F. (1971) Degradation of clay minerals by H$_2$O$_2$ treatment to oxidize organic matter. Clays and Clay Minerals, 19, 67-68.   DOI
3 Drosdoff, M. and Miles, E.F. (1938) Action of hydrogen peroxide on weathered mica. Soil Science , 46, 391-395.
4 Hodson M.E., Langan S.J., Kennedy F.M., and Bain D.C. (1998) Variation in soil surface aea in a chronosequence of soils from Glen Feshie, Scotland and its implications for mineral weathering rate calculations. Geoderma, 85, 1-18.   DOI   ScienceOn
5 Holdren , G.R. and Speyer P.M., 1987, Reaction rate-surface area relat ionships during the early stages of weathering. II. Data on eight additional feldspars. Geochim . Cosmochim . Acta, 51, 2311-2318.
6 Marschner, H. (1995) Mineral Nutrition of Higher Plants . London , Academic Press, 529pp.
7 Nilsson, J. and Grennfelt, P. (1988) Critical loads for sulphur and nitrogen . Report from a workshop held at Skokloster, Sweden March 1988. Nordic counci l of ministers and the United Nations Economic Commission for Europe (ECE) pp.418.
8 Theng, B.K.G., Ristori , G.G., Santi, C.A., and Percival , HJ. (1999) An improved method for determining the specific surface areas of top soils with varied organic matter content, texture and clay mineral composition. Eura. J. Soil Sci., 50, 309-316.
9 Vandevivere, P., Welch, S.A., Ullman, W.J., and Kirchman, D.L. (1994) Enhanced dissolution of silicate minerals by bacteria at near-neutral pH. Microb. Eco\., 27, 241-251.
10 Velbel, M.A. (1993) Constancy of silicate-mineral weathering-rate ratios between natural and experimental weathering: implications for hydrologic controls of differences in absolute rates. Chemical Geology, 105 89-99.
11 Webley, D.M., Henderson, M.E.K., and Taylor, I.F. (1963) The microbiology of rocks and weathered stones. J. Soil Sci., 14, 102-112.
12 Hodson , M.E., Langan , SJ., and Meriau, S. (1997) Determination of mineral surface area in relation to the calculation of weathering rates. Geoderma, 83, 35-54 .
13 Kutuzova, R.S. (1969) Release of silica from minerals as a result of microbial activity . Mikrobiologia, 38, 5596-602.
14 Berthelin, J. (1971) Alteration microbienne dune arene granitique: Note preliminaire. Science du Sol., I, 11 -29.
15 Brunauer, S., Emmett, P.H., and Teller, E. (1938) Adsorption of gases in multimolecular layers . J. Am. Chem. Soc., 60, 309-3 19.
16 Holdren G.R. and Speyer P.M. (1985) Reaction rate-surface area relationships during early stages of weathering - I. Initia l observations. Geochim. Cosmochim. Acta, 49, 675-681.
17 Williams, M.E. and Rudolf, E.D. (1974) The role of lichens and associated fungi in the chemical weathering of rock. Mycologia, 66, 648-660.
18 Avakyan, Z.A., Karavaiko , G.I., Melnikova, E.O.,Krustsko , V.S., and Ostroushko, Y.I. (1981) Role of microscopic fungi in weath ering of rocks and minerals from a pegmatite deposit. Mikrobiologia, 50, 115-120.