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Surface properties of bentonite and illite complexes with humus acids

  • A. Księżopolska (a1) and M. Pazur (a1)


In this study, the reaction between humus acids (humic acid and β-humus fulvic acid fraction) and bentonite and illite was studied at a variety of pH values. The degree of reaction was determined from the specific surface area and molar energy of adsorption. Characteristic parameters of adsorption isotherms for the formation of a mono-layer of the adsorbent, such as the constant C from the BET equation, mono-layer capacity (N m), and standard error square (R 2), were also included in the study. After the addition of humus acids, the specific surface area of illite and bentonite decreased at all pH values, reaching a minimum at pH 4. This indicates different degrees of reaction of humus acids with the clays and, probably, partial hydrophobization of the materials. The degree of reaction of humus acids with the minerals depended on the pH and, for certain combinations, it was highest at pH 4. This value is relatively close to that at which the humus acid fractions in question precipitate from solution.


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Akther, A., Hwang, J. & Lee, H. (2008) Sedimentation characteristics of two commercial bentonites in aqueous suspensions. Clay Minerals, 43, 449–457.
Allen, B.L. & Hajek, B.F. (1989) Mineral occurrence in soil environments. Pp. 199–278 in: Minerals in Soil Environments (J.B. Dixon & S.B. Weed, editors), 2nd Edition. SSSA Book Series 1, Madison, Wisconsin, USA.
Bantignies, J.L., Cartier dit Moulin, C. & Dexpert, H. (1997) Wettability contrast in kaolinite and illite clays: characterization by infrared and X-ray adsorption spectroscopies. Clays and Clay Minerals, 45, 184–193.
Berkheiser, C.E. (1981) Comparison of water adsorption by monovalent exchange ion forms of soil humic material and synthetic exchanges. Soil Science, 131, 172–177.
Borchardt, G. (1989) Smectites. Pp. 675–728 in: Minerals in Soil Environments (J.B. Dixon & S.B. Weed, editors). 2nd Edition, SSSA Book Series 1. Madison, Wisconsin, USA.
Braunauer, S., Emmet, P.H. & Teller, E. (1938) Adsorption of gases in multimolecular layers. Journal of the American Chemical Society, 60, 309–319.
Carter, D.L., Mortland, M.M. & Kemper, K.D. (1986) Specific surface. Pp. 413–423 in: Methods of Soil Analysis (A. Klute, editor) Part 1, 2nd ed. Agronomy Monograph, 9, Madison Wisconsin, USA.
Chiu, C.T., Lee, J.F. & Boyd, S.A. (1990) The surface area of soil organic matter, Environmental Science & Technology. 24, 1164–1166.
Christidis, G.E. (2009) Do bentonites have contradictory characteriristics? An attempt to answer unanswered questions. Clay Minerals, 43, 515–529.
Churchman, G.J. & Burke, C.M. (1991) Properties of subsoils in relation to various measures of surface area and water content. European Journal of Soil Science, 42, 463–478.
Cordorio, N., Silva, J., Gomes, C. & Rocha, F. (2010) Bentonite from Porto Santo Island, Maderia archipelago: surface properties studied by inverse gas chromatography. Clay Minerals, 44, 77–86.
Faghihian, H. & Nejati-Yazdinejad, M. (2009) Equilibrium study of adsorption of L-cysteine by natural bentonite. Clay Minerals, 44, 125–133.
Fanning, D.S., Keramidas, V.Z. & El-Desosky, M.A. (1989) Micas. Pp. 527–634 in: Minerals in Soil Environments (J.B. Dixon and S.B. Weed, editors) 2nd Edition SSSA Book Series 1. Madison, Wisconsin, USA.
Flis-Bujak, M., Księżopoolska, A., Stawiński, J. & Dąbek- Szreniawska, M. (1997) Microstructure of humic acid and b-humic acids from water and N2 adsorption. Pp. 121–126 in: The Role of Humic Substances in Ecosystems and in Environmental Protection (J. Drozd, S. Gonet & N. Senesi, editors), IHSS, Wrocław, Poland.
Greenland, D.J. (1971) Interactions between humic and fulvic acids and clays. Soil Science, 111, 34–41.
Hajnos, M. (1999) Surface energy and its components as parameters determining wettability and aggregation state of selected clay minerals and soils. Acta Agrophysica, 17, 1–116.
Jouany, C. (1991) Surface free energy components of clay-synthetic humic acid complexes from contact angle measurements, Clays and Clay Minerals, 39, 43–49.
Jouany, C. & Chassin, P. (1987) Determination of the surface energy of clay-organic complexes by contact angle measurements. Colloids and Surfaces, 27, 289–303.
Józefaciuk, G. (1998) Changes of surface properties of soils and clay minerals in acidification and alkalization processes. Acta Agrophysica, Monograph, 15, 115 pp.
Khojastehnazhand, M., Tabatabaeefar, A. & Omid, M. (2009) Determination of orange volume and surface area using image technique. International Agrophysics, 23, 237–242.
Kononowa, M.M. (1968) Organic Matter in the Soils; its Structure, Properties, and Methods of Study. PWRL, Warsaw, Poland.
Księżopolska, A. (1996) The Role of Humic Acid Fractions in the Formation Surface Phenomena of Soil Material, Ph.D. thesis, Institute of Agrophysics, Polish Academy of Sciences in Lublin, Poland, pp. 93 (in Polish).
Księżopolska, A. (2001) Assessment of the conditions for the formation of organic-mineral complexes in soils on the basis of surface properties. International Agrophysics, 15, 165–172.
Lackovic, K., Brunce, B., Johnson, B., Michael, J., Angove, T. & Wells, J.D. (2003) Modeling the adsorption of citric acid onto Muloorina illite and related clay minerals, Journal of Colloid and Interface Science, 267, 49–59.
Mackenzie, R.C. & Richtie, P.F.S. (1972) Proceedings 3rd ICTA , Davos. Basel-Stuttgart. Mortland M.M. (1970) Clay-organic complexes and interactions. Advances in Agronomy, 22, 75–117.
Ościk, J. (1982) Adsorption. PWS, Ellis Horwood, Chichester, UK.
Polish Standard PN-Z-19010-1, (1997) Soil Quality, Determination of the Specific Surface Area of Soils by Water Sorption (BET). Warsaw, Poland (in Polish).
Ruch, R.J. & Shen, M.S. (1971) The wetting of films of organo-bentonite complexes, Journal of Colloid and Interface Science, 37, 819–823.
Sampaio, E.P. & Sampaio, J.M. (2010) Advances in morphometry of soil macroporosity through simple techniques of mathematics. International Agrophysics, 24, 303–311.
Schnitzer, M. & Schluppli, P. (1989) The extraction of organic matter from selected soils and particle size fractions with 0.5 M NaOH and 0.1 M Na4P2O7 solutions. Canadian Journal of Soil Science, 69, 1418–1424.
Sokołowska, Z., Hajnos, M. & Dąbek-Szreniawska, M. (1999) Relation between adsorption of water vapour, specific surface area and soil cultivation. Polish Journal of Soil Science, 32/2, 3–11.
Somelar, P., Kirsimae, K. & Środoń, J. (2009) Mixed layer illite-smectite in the Kinnekulle K-bentonite, northern Baltic Basin, Clay Minerals, 44, 455–468.
Środoń, J. (2010) Quantification of illite and smectite and their layer charges in sandstones and shales from shallow burial depth. Clay Minerals, 44, 421–434.
Stawiń ski, J. (1977) Interrelationships between the specific surface area and some physico-chemical properties of soils. Zeszyty Problemowe Postępów Nauk Rolniczych, 197, 229–240.
Stawiński, J., Wierzchoś, J. & Garcia-Gonzalez, M.T. (1990) Influence of calcium and sodium concentration on the microstructure of bentonite and kaolin. Clays and Clay Minerals, 38, 617–622.
Stawiński, J., Gliński, J., Ostrowski, J., Stępniewska, Z., Sokołowska, Z., Bowanko, G., Jó zefaciuk, G., Księżopolska, A. & Matyka-Sarzyńska, D. (2000) Spatial characterization of specific surface area of arable soils in Poland, Acta Agrophysica, 33, pp. 43.
Stevenson, F.J. (1994) Humus Chemistry: Genesis, Composition, Reactions. John Wiley & Sons, New York.
Theng, B.G.K. (1974) The Chemistry of Clay-Organic Reactions. John Wiley Sons, New York.
Tombacz, E., Szekeres, M., Barangi, L. & Micheli, E. (1998) Surface modification of clay minerals by organic polyions, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 141, 379–384.
Varadachari, Ch., Mondal, A.H., Dulalc, N. & Ghosh, K. (1994) Clay-humus complexation: effect of pH and the nature of bonding. Soil Biology and Biochemistry, 26, 1145–1149.


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Surface properties of bentonite and illite complexes with humus acids

  • A. Księżopolska (a1) and M. Pazur (a1)


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