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Effect of Soil Organic Matter on Arsenic Adsorption in the Hematite-Water Interface: Chemical Speciation Modeling and Adsorption Mechanism  

Ko, Il-Won (Arsenic Geoenvironment Laboratory (NRL), Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST))
Kim, Ju-Yong (Arsenic Geoenvironment Laboratory (NRL), Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST))
Kim, Gyeong-Ung (Arsenic Geoenvironment Laboratory (NRL), Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST))
An, Ju-Seong (Groundwater and Geothermal Resource Division, Korea Institute of Geoscience and Mineral Resources)
Davis, A. P. (Department of Civil and Environmental Engineering and Maryland Water Resources Research Center, University of Maryland)
Publication Information
Economic and Environmental Geology / v.38, no.1, 2005 , pp. 23-31 More about this Journal
Abstract
This study was performed to investigate the effect of humic acid on the adsorption of arsenic onto hematite and its binding mechanism through the chemical speciation modeling in the binary system and the adsorption modeling in the ternary system. The complexation modeling of arsenic and humic acid was suitable for the binding model with the basis of the electrostatic repulsion and the effect of bridging metal. In comparison with the experimental adsorption data in the ternary system, the competitive adsorption model from the binary intrinsic equilibrium constants was consistent with the amount of arsenic adsorption. However, the additive rule showed the deviation of model in the opposite way of cationic heavy metals, because the reduced organic complexation of arsenic and the enhanced oxyanionic competition diminished the adsorption of arsenic. In terms of the reaction mechanism, the organic complex of arsenic, neutral As(III) and oxyanionic As(V) species were transported and adsorbed competitively to the hematite surface forming the inner-sphere complex in the presence of humic acid.
Keywords
Arsenic; Humic acid; Hematite; Chemical speciation; Adsorption;
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1 Kinniburgh, D.G., Milne, C.J., Benedetti, N.F., Pinheiro, J.P., Filius, J., Koopal, L.K. and Van Riemsdjik,W.H.(1996) Metal ion binding by humic acid: application of the NICA-Donnan Model. Environ. Sci. Technol., v. 30, p. 1687-1698   DOI   ScienceOn
2 Waychunas, G.A., Rea, B.A., Fuller, C.C. and Davis, J.A. (1993) Surface chemistry of ferrihydrite: Part 1. EXAFS studies of the geometry of coprecipitated and adsorbed arsenate. Geochim. Cosmochim. Acta, v. 57, p. 2251-2269   DOI   ScienceOn
3 Vermeer, A.W.P., W.H. van Riemsdijk, and L.K. Koopal. (1998) Adsorption of humic acid to mineral particles. 1. Specific and electrostatic interactions. Langmuir. v. 14, p. 2810-2819   DOI   ScienceOn
4 Ko, I.W., Kim, J.Y. and Kim, K.W. (2004a) Arsenic speciation and sorption kinetics in the As-hematitehumic acid system. Colloids and Surfaces A: Physicochem. Eng. Aspects., v. 234, p. 43-50   DOI   ScienceOn
5 Christl, I. and Kretzschmar, R. (2001) Interaction of copper and fulvic acid at the hematite-water interface. Geochim. Cosmochim Acta, v. 65, p. 3435-3442   DOI   ScienceOn
6 Tipping, E. (1981) The adsorption of aquatic humic substances by iron oxides. Geochim. Cosmochim. Acta. v. 45, p. 191-199   DOI   ScienceOn
7 Ko, I.W., Kim, J.Y. and Kim, K.W. (2004b) Adsorption properties of soil humic and fulvic acid onto hematite. Chem. Spe. Bioavail., (in review)
8 Oliver, B.G., Beck, K.C. and Reuter, J.H. (1983) The contribution of humic substances to acidity of colored natural waters. Geochem. Cosmochim. Acta, v. 47, p.2031-2035   DOI   ScienceOn
9 Goldberg, S. and Johnston, C.T. (2001) Mechanisms of arsenic adsorption on amorphous oxides evaluated using macroscopic measurements, vibrational spectroscopy and surface complexation modeling. J. Colloid Interface Sci., v. 234, p. 204-216   DOI   ScienceOn
10 Dzombak, D.A. and Morel, F.M.M. (1990) Surface complexation modeling: Hydrous ferric oxide. John Wiley and Sons, New York
11 Christl, I. and Kretzschmar, R. (1999) Competitive sorption of copper and lead at the oxide-water interface: Implications for surface site density. Geochim. Cosmochim Acta, v. 63, p. 2929-2938   DOI   ScienceOn
12 Hsia, T.H., Lo, S.L. and Lin, C.F. (1992) As(V) adsorption on amorphous iron oxide: Triple layer modelling. Chemosphere, v. 25, p. 1825-1837   DOI   ScienceOn
13 고일원, 이상우, 김주용, 김경웅, 이철효 (2004) 나노크기 적철석 입자 피복 모래를 이용한 비소 3가와 비소 5 가의 제거. 지하수토양환경학회지, 9권, p. 63-69
14 Redman, A.D., Macalady, D.L. and Ahmann, D. (2002) Natural organic matter affects arsenic speciation and sorption onto hematite. Environ. Sci. Technol., v. 36, p. 2889-2896   DOI   ScienceOn
15 Sugimoto, T., Sakata, K. and Muramastu, A. (1992) Formation mechanism of monodisperse pseudo-hematite particles from condensed ferric hydroxide gel. J. Colloid Interface Sci., v. 159, p. 372-382   DOI   ScienceOn
16 O'Reilly, S.E., Strawn, D.G. and Sparks, D.L. (2001) Residence time effects on arsenate adsorption/desorptionmechanisms on goethite. Soil Sci. Soc. Am. J., v. 65, p.67-77   DOI   ScienceOn
17 Stevenson, F.J. (1994) Humus chemistry: Genesis, composition, reactions. Wiley
18 Fendorf, S., Eick, M.J., Grossl, P. and Sparks, D.L. (1997) Arsenate and chromate retention on goethite: I. Surface structure. Environ. Sci. Technol., v. 31, p. 315-320   DOI   ScienceOn