Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-27T14:18:43.552Z Has data issue: false hasContentIssue false
  • English
  • Français

Interaction of Hg(II) with kaolin-humic acid complexes

Published online by Cambridge University Press:  09 July 2018

M. Arias ,
M.T. Barral ,
J . Da Silva–Carvalhal ,
J .C. Mejuto  and
D. Rubinos
M. Arias*
Affiliation:
Area de Edafoloxía e Química Agrícola, Facultade de Ciencias de Ourense, Universidade de Vigo, 32004, Ourense
M.T. Barral
Affiliation:
Departamento de Edafoloxía e Química Agrícola, Facultade de Farmacia, Universidade de Santiagode Compostela, 15706, Santiago de Compostela
J . Da Silva–Carvalhal
Affiliation:
Departamento de Química Física, Facultade de Ciencias de Ourense, Universidade de Vigo, 32004, OurenseSpain
J .C. Mejuto
Affiliation:
Departamento de Química Física, Facultade de Ciencias de Ourense, Universidade de Vigo, 32004, OurenseSpain
D. Rubinos
Affiliation:
Departamento de Edafoloxía e Química Agrícola, Facultade de Farmacia, Universidade de Santiagode Compostela, 15706, Santiago de Compostela
*
E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

The adsorption and desorption of Hg(II) by humic acid (HA) previously adsorbed on kaolin was studied. In the range of HA concentration investigated (0.0 –26.9 mg g–1), the Hg(II) adsorption capacity of kaolin at pH 4 is enhanced by the presence of HA. For the complexes with the highest HA concentration and for low Hg(II) initial concentrations, adsorption was lower, i.e. as HA concentration on the complexes increases, Hg(II) equilibrium concentration also increases. This behaviour is due to the increasing presence of dissolved organic matter as the HA concentration on the complexes increases. The dissolved organic matter is able to form a soluble complex with Hg, thus decreasing adsorption. Hg(II) adsorption from a 2.5×10–5 MHg(II) solution was influenced by pH. For kaolin, a pHmax (pH where maximum adsorption occurs) of 4.5 was observed. At pH values >pHmax retention decreased with increasing pH. This same behaviour was observed for the kaolin- HA complex containing the lowest HA concentration (6.6 mg g –1). For the other kaolin-HA complexes there was little effect of pH on Hg(II) adsorption between pH 2.5 and pH 6.5. The presence of HA increased the adsorption of Hg(II) on kaolin all along the pH range studied. Desorption experiments showed that the amount of Hg(II) desorbed was quite low (<1%) for all the HA and Hg(II) concentration range studied, except for the kaolin at acid pH (pH 2.5) where the Hg(II) released was >50% of Hg(II) previously adsorbed. The presence of HA dramatically reduced this percentage of desorption to values of <3%, indicating reduced risk of toxicity problems in surface and subsurface waters. The addition of Cu(II) did not favour any Hg(II) desorption, even though Cu exhibits a strong affinity for organic matter.

Keywords

mercuryhumic acidkaolinadsorptiondesorption
Type
Research Article
Information
Clay Minerals , Volume 39 , Issue 1 , March 2004 , pp. 35 - 45
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Allard, B. & Arsenie, I. (1991) Abiotic reduction of mercury by humic substances in an aquatic system – an important process for the mercury cycle. Water, Air, and Soil Pollution, 56, 457–464 CrossRefGoogle Scholar
Allison, J.D., Brown, D.S. & Novo-Gradac, K.J. (1991) MINTEQA2/PRODEFA2: A geochemical assessment model for environmental systems (Version 3.0). USEPA, Athens, Georgia.Google Scholar
Anderson, A. (1979) Mercury in soil. Pp. 79–112 in: The Biogeochemistry of Mercury in the Environment(Nriagu, J.O., editor). Elsevier, North-Hollan d Biomedical Press, Amsterdam, The Netherlands.Google Scholar
Arias, M., Barral, M.T. & Díaz-Fierros, F. (1996) Effects of associations between humic acids and iron or aluminium on the flocculation and aggregation of kaolin and quartz. European Journal of Soil Science, 47, 335–343 Google Scholar
Arias, M., Núnez, A., Rubinos, D., Barral, M.T. & Diaz-Fierros, F. (2001a) Contamination of soils near a road const ruct ion si te cause d by mine runoff, s. Agrochimica, 45, 134–146 Google Scholar
Arias, M., Soto, B. & Barral, M.T. (2001b) Interaction of cadmium with organo -mineral associ ations. Agrochimica, 45, 218–227 Google Scholar
Arias, M., Barral, M.T. & Mejuto, J.C. (2002) Enhancement of copper and cadmium adsorption on kaolin by the presence of humic acids. Chemosphere, 48, 1081–1088 Google Scholar
Baes, C.F. & Mesmer, R.E. (1976) The Hydrolysis of Cations. Wiley-Interscience, New York.Google Scholar
Barrow, N.J. (1999) The four laws of soil chemistry: the Leeper lecture 1998. Australian Journal of Soil Research, 37, 787–829 Google Scholar
Barrow, N.J. & Cox, C. (1992) The effects of pH and chloride concentration on mercury sorption. I. By a soil. Journal of Soil Science, 43, 305–312 Google Scholar
Cavallaro, N. & McBride, M.B. (1984) Zinc and copper sorption and fixation by an acid soil clay: Effect of selective dissolutions. Soil Science Society of America Journal, 48, 1050–1054 Google Scholar
Conde-Pumpido, R. (1986) Caolines de Galicia. Estudio de sus propiedades reológicas. Doctoral thesis, Univesity of Santiago de Compostela, Spain.Google Scholar
Drexel, R.T., Haitzer, M., Ryan, J.N., Aiken, G.R. & Nagy, K. (2002) Mercury(II) sorption to two Florida Everglades peats: Evidence for strong and weak binding and competition by dissolved organic matter released from the peat. Environmental Science and Technology, 36, 4058–4064 Google Scholar
Farrah, H. and Pickering, W.F. (1978) The sorption of mercury species by clay minerals. Water, Air, and Soil Pollution, 9, 23–31 CrossRefGoogle Scholar
Galán, E. & Martín, J.L. (1975) Caolines españoles. Geología, mineralogía y génesis. Parte VIII. Depósitos residuales y volcánicos. Boletín de la Sociedad Española de Cerámica y Vidrio, 24, 351–370 Google Scholar
Garcia Sanchez, A., Alvarez Ayuso, E. & Jiménez de Blas, O. (1999) Sorption of heavy metals from industrial waste water by low-cost mineral silicates. Clay Minerals, 34, 469–477 Google Scholar
Greenland, D.J. (1965) Interactions between clays and organic compounds in soils. Soils Fertilizers, 28, 415–425 Google Scholar
Guitián, F. & Carballas, T. (1976) Técnicas de análisis de sue los. Edi toria l Pico Sac ro, Sant iago de Compostela, Spain.Google Scholar
Haitzer, M., Aiken, G.R. & Ryan, J.N. (2002) Binding of Mercury(II) to dissolved organic matter: The role of the Mercury- to-DOM Concentration rat io. Environmental Science and Technolog y, 36, 3564–3570 Google Scholar
Hesterberg, D., Chou, J.W., Hutchinson, K.J. & Sayers, D.E. (2001) Bonding of Hg(II) to reduced organic sulphur in humic acid as affected by S/Hg ratio. Environmental Science and Technolog y, 35, 2741–2745 Google ScholarPubMed
James, R.O. & Healy, T.W. (1972) Adsorption of hydrolizable metals ions at the oxide-water interface: III. A thermodynamic model of adsorption. Journal of Colloid and Interface Science, 40, 65–80 Google Scholar
Kabata-Pendias, A. & Pendias, H. (2001) Trace Elements in Soils and Plants, 3rd edition. CRC Press LLC, Florida, USA.Google Scholar
McBride, M., Martínez, C.E. & Sauvé, S. (1998) Copper(II) activity in aged suspensions of goethite and organic matter. Soil Science Society of America Journal, 62, 1542–154 Google Scholar
Sarkar, D., Essington, M.E. & Misra, K.C. (1999) Adsorption of mercury(II) by variable charge surfaces of quartz and gibbsite. Soil Science Society of America Journal, 63, 1626–1636 Google Scholar
Sarkar, D., Essington, M.E. & Misra, K.C. (2000) Adsorption of mercury(I I) by kaolinite. Soil Science Society of America Journal, 64, 1968–1975 Google Scholar
Schnitzer, M. (1978) Humic Substances: Chemistry and Reactions. Pp. 1–64 in: Soil Organic Matter(Schnitzer, M. & Khan, S.U., editors). Elsevier Publishing, Amsterdam, The Netherlands.Google Scholar
Schnitzer, M. (1982) Organic matter characterization. Pp. 581–594 in: Methods of Soil Analysis. Part II. Chemical and Microbiological Properties(Page, A.L., Miller, R.H. & Keeney, D.R., editors). Soil Science Society of America, Madison, Wisconsin, USA.Google Scholar
Schnitzer, M. (1986) Binding of humic substances by soil mineral colloids. Pp. 78 – 102 in: Interactions of Soil Minerals with Natural Organics and Microbes(Huang, P.M. & Schnitzer, M., editors). Special Publication 17, Soil Science Society of America, Madison, Wisconsin, USA.Google Scholar
Schultz, M.F., Benjamin, M.M. & Ferguson, J.F. (1987) Adsorption and desorption of metals on ferrihydrite: Reversibility of the reaction and sorption properties of the regenerate solid. Environmental Science and Technology, 21, 863–869 Google Scholar
Schuster, E. (1991) The behavior of mercury in the soil with special emphasis on complexation and adsorption processes – A review of the literature. Water, Air, and Soil Pollution, 56, 667–680 CrossRefGoogle Scholar
Steinnes, E. (1995) Mercury. In: Heavy Metals in Soils. (Alloway, B.J., editor). Blackie Academic & Professional, Chapman & Hall, Glasgow, UK.Google Scholar
Stumm, W. & Morgan, J.J. (1981) Aquatic Chemistry. John Wiley, New York.Google Scholar
Thanabalasingam, P. & Pickering, W.F. (1985) Sorption of me rc ury( I I ) by manganese( IV) oxide. Environmental Pollution, Series B, 10, 115–128 Google Scholar
Tiffreau, C., Lutzerkinchen, J. & Behra, P. (1995) Modeling the adsorpt ion of mercury( II) on (Hydr)oxides. I. Amorphous iron oxide and alphaquartz. Journal of Colloid and Interface Science, 172, 82–93 Google Scholar
Tipping, E. (1994) WHAM – A chemical equilibrium model and computer code for waters, sediments and soils incorporating a discrete site/electrostatic model of ion-binding by humic substances. Computers and Geoscience, 20, 973–1023 Google Scholar
Tipping, E. & Hurley, M.A. (1992) A unifying model of cation binding by humic substances. Geochimica et Cosmochimica Acta, 56, 3627–3641 Google Scholar
Viraraghavan, T. & Kapoor, A. (1994) Adsorption of mercury from wastewater by bentonite. Applied Clay Science, 9, 31–49 Google Scholar
Xia, K., Skyllberg, U.L., Bleam, W.F., Bloom, P.R., Nater, E.A. & Helmke, P.A. (1999) X-ray absorption spectroscopic evidence for the complexation of Hg(II) by reduced sulfur in soil humic substances. Environmental Science and Technology, 33, 257–261 CrossRefGoogle Scholar
Yin, Y., Allen, H.E., Li, Y., Huang, C.P. & Sanders, P.F. (1996) Adsorption of mercury(II) by soil: Effects of pH, chloride, and organic matter. Journal of Environmental Quality, 25, 837–844 Google Scholar
Yin, Y., Allen, H.E., Li, Y., Huang, C.P. & Sanders, P.F. (1997) Adsorption/desorption isotherms of Hg(II) by soil. Soil Science, 162, 35–45 CrossRefGoogle Scholar