Modeling the adsorption of mercury(II) on (hydr)oxides. 1: Amorphous iron oxide and {alpha}-quartz

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Journal of Colloid and Interface Science

DOI:https://doi.org/10.1006/jcis.1995.1228· OSTI ID:63229

Tiffreau, C; Luetzenkirchen, J; Behra, P ^[1]

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1. Univ. Louis Pasteur, Strasbourg (France). Inst. de Mecanique des Fluides

In this study, the authors provide a single model capable of describing the behavior of mercury(II) at two different solid/water interfaces. Mercury(II) sorption on amorphous ferric oxide (HFO) and {alpha}-SiO{sub 2} can be simulated using the surface complexation approach. In both cases, experiments are best reproduced when ternary surface complexes between the surface ({triple_bond}S-OH{sup 0}), Hg{sup 2+}, OH{sup {minus}} or Cl{sup {minus}} are included in the model. Sorption of ternary surface complexes predominates in the case of {alpha}-SiO{sub 2}. In addition, in the case of HFO, additional precipitation reactions of a nonideal Hg(OH){sub 2}-Fe(OH){sub 3} solid solution are needed at high sorbate to sorbent ratios. The modeling leads to a new set of surface complexation constants for the interaction between Hg{sup 2+} and these oxide surfaces which are described herein.

• OSTI ID: 63229
• Journal Information: Journal of Colloid and Interface Science, Journal Name: Journal of Colloid and Interface Science Journal Issue: 1 Vol. 172; ISSN 0021-9797; ISSN JCISA5
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ACTIVATION ENERGY
ADSORPTION
CHEMICAL REACTIONS
ENVIRONMENTAL TRANSPORT
GROUND WATER
HYDROXIDES
IRON HYDROXIDES
IRON OXIDES
MATHEMATICAL MODELS
MERCURY
MERCURY COMPOUNDS
SILICON OXIDES
SOILS
SORPTIVE PROPERTIES
SURFACE WATERS