Surface complexation model for the heavy metal adsorption on natural sediment
Article Abstract:
The surface properties and adsorption behavior of natural aquatic sediment was characterized in a study using the surface complexation model (SCM) approach. While SCMs have been successfully employed to characterize metal ion adsorption on pure mineral materials, the approach has been rarely applied to model adsorption on natural materials. In the study, all the model parameters were ascertained on the basis of the experimental data of the potentionmetric titration and the metal adsorption isotherm using sediment from Le An River, China. It was found that all the three typical versions of the surface complexation model used in the study can simulate the experimental results very well. The results denote that SCMs can be utilized to successfully model natural materials.
Comment:
China: Surface properties/adsorption behavior of natural aquatic sediment is described via surface complexation model approach
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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Temporal trends in the isotope signature of air-borne sulfur in Central Europe
Article Abstract:
In Central Europe, the concentration of atmospheric sulfates has decreased much more slowly than industrial emissions. This study, conducted in the Czech Republic, tests the theory that biological emissions may significantly add to the concentration of airborne sulfates. Soil samples show that the biological emission of sulfur is isotopically light at summer temperatures and isotopically heavy during winter conditions, following the overall trend for atmospheric sulfer concentrations.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 2001
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Sulfur isotope signals in forest soils of Central Europe along an air pollution gradient
Article Abstract:
The dynamics of sulfur adsorption in forest soils and the topsoil sulfur concentrations were analyzed from selected sites in Czech Republic by utilizing stable isotopes of delta34S. High concentrations of delta34S were detected from forest topsoil and mineral soils indicating conditions that are suitable for bacterial sulfate reduction. Furthermore, the concentration of sulfur isotopes in forests moss varied significantly with the delta34S concentrations of forest topsoils.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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