The role of hydroxy aluminium sulfate minerals in controlling Al3+ concentration and speciation in acidic soils

• Authors: Igor Povar , Oxana Spinu
• Languages of publication: EN

Abstracts

EN

A thermodynamic approach for the complex chemical equilibria investigation of two-phase systems containing hydroxy aluminium sulfate (HAS) minerals in soils has been developed. This approach utilizes thermodynamic relationships combined with original mass balance constraints, where the HAS mineral phases are explicitly expressed. The factors influencing the distribution and concentrations of various soluble aluminium species have been taken into account. The new type of diagrams, based on thermodynamic, graphical and computerized methods, which quantitatively describe the distribution of soluble and insoluble inorganic, and organic, monomeric and polymeric aluminium species in acidic soil solutions in a large range of pH values has been used. The thermodynamics of equilibria of different natural HAS in soils, the conditions under which solids involving common ions can coexist at equilibrium, the acid-base and mineral equilibria and complex formation have been examined. It has been proved that the presence of sulfate ion dramatically alters the HAS mineral solubility under acidic conditions. The obtained data regarding the factors influencing Al speciation, based on the constructed diagrams of heterogeneous chemical equilibria, are in good agreement with the current experimental and theoretical evidence. The proposed approach is intended to determine the dominant processes that are responsible for the Al3+ concentration levels and its speciation in acidic soils.

Keywords

EN

Aluminium heterogeneous speciation; Chemical heterogeneous equilibria; Complex formation; Gibbs energy; Hydroxyl aluminium sulfate thermodynamic stability

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2014
• Volume: 12
• Issue: 8
• Pages: 877-885

Dates

published

1 - 8 - 2014

online

1 - 5 - 2014

Contributors

author

Igor Povar

• Academy of Sciences

author

Oxana Spinu

• Academy of Sciences

References

• [1] T. Larssen et al., Water, Air, Soil Pollut. 101, 137 (1998) http://dx.doi.org/10.1023/A:1004985209931[Crossref]
• [2] W. Stumm, J.J. Morgan, Aquatic chemistry: An introduction emphasizing chemical equilbria in natural waters (Wiley, New York, 1981)
• [3] C.T. Driscoll, W.D. Schecher, Environ. Biochem. Health 12, 28 (1990) http://dx.doi.org/10.1007/BF01734046[Crossref]
• [4] A. M. Jones, R. N. Collins, T. D. Waite, Geochim. Cosmochim. Acta 75, 965 (2011) http://dx.doi.org/10.1016/j.gca.2010.12.001[Crossref]
• [5] F. Adams, Y. Rawajfih, Soil Sci. Soc. Am. J. 41, 686 (1977) http://dx.doi.org/10.2136/sssaj1977.03615995004100040013x[Crossref]
• [6] J. Sánchez-España, I. Yusta, M. Diez-Ercilla, Appl. Geochem. 26, 1752 (2011) http://dx.doi.org/10.1016/j.apgeochem.2011.06.020[Crossref]
• [7] R.E. Stoffregen, G.L. Cydan, Amer. Min. 75, 209 (1990)
• [8] C.A.J. Appelo, D. Postma, Geochemistry, Groundwater and Pollution (A. A. Balkema, Rotterdam, 1993)
• [9] A.D. Karathanasis, V.P. Evangelou, Y.L. Thompson, J. Environ. Quality 17, 534 (1988) http://dx.doi.org/10.2134/jeq1988.00472425001700040003x[Crossref]
• [10] T. Delfosse, F. Elsass, B. Delvaux, Eur. J. Soil Sci. 56, 281 (2005) http://dx.doi.org/10.1111/j.1365-2389.2004.00675.x[Crossref]
• [11] I. Povar, V. Rusu, Can. J. Chem. 90, 326 (2012) http://dx.doi.org/10.1139/v2012-003[Crossref]
• [12] I. Povar, J. Anal. Chem. 53, 1113 (1998)
• [13] I. Povar, Russ. J. Gen. Chem. 70, 501 (2000)
• [14] I. Povar, Can. J. Chem. 79, 1166 (2001) http://dx.doi.org/10.1139/v01-065[Crossref]
• [15] I. Povar, Russ. J. Inorg. Chem. 42, 607 (1997) (Engl. Transl.)
• [16] I. Fishtik, I. Povar, I. Vataman, Zh. Obshch. Khim. 56, 739 (1986) (In Russian)
• [17] I. Fishtik, I. Povar, Zh. Obshch. Khim. 57, 31 (1987) (In Russian)
• [18] I. Fishtik, I. Povar, I. Vataman, Zh. Obshch. Khim. 57, 736 (1987) (In Russian)
• [19] I. Povar, I. Fishtik, I. Vataman, Izv. Akad. Nauk Mold. SSR, Ser. Biol. Khim. Nauk 5, 57 (1989) (In Russian)
• [20] I. Povar, Ukr. Khim. Zh. 60, 371 (1994) (In Russian)
• [21] D.K. Nordstrom, Geochim. Cosmochim. Acta 46, 681 (1982) http://dx.doi.org/10.1016/0016-7037(82)90168-5[Crossref]
• [22] S. Bi et al., Environ. Geol. 41, 25 (2001) http://dx.doi.org/10.1007/s002540100381[Crossref]

Identifiers

DOI

10.2478/s11532-014-0540-4