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