Abstracts » Science and technology

Influence of molecular properties under anoxic solution conditions

Article Abstract:

Granular activated carbon's (GAC) adsorption of nine different natural and synthetic macromolecular dissolved organic materials (DOMs) was studied to understand the roles of DOM molecular size and chemical structure in the process. Adsorption of polystyrene sulfonate was noted to decrease as macromolecular size increases. The same was true for Laurentian, peat and Aldrich humic acids which were fractionated by ultrafiltration. Such similarity indicates a relative uniformity of the chemistry of humic macromolecules from one fraction to another. It also indicates that physical size effects are the main factor behind the differences in GAC uptake of different fractions.

Analysis, Activated carbon, Macromolecules, Carbon, Activated

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Adsorption of weak polyelectrolytes on metal oxide surfaces: a hybrid SC/SF approach

Article Abstract:

The surface complexation (SC) model was used in conjunction with the Scheutjens-Fleer framework in assessing the adsorption process that occurs between polyeltrolytes on metal oxide surfaces. It was established that solution chemistry and polyelectrolyte speciation both generate a profound effect on the interaction of functional groups and surface sites. It was further shown that the hybrid SC/SF model provides comprehensive information about adsorption over a wide range of conditions.

All Other Miscellaneous Chemical Product and Preparation Manufacturing, Primary Metal Manufacturing, PRIMARY METAL INDUSTRIES, Metals, Chemical preparations, not elsewhere classified, Polyelectrolytes, Metals (Materials), Metallic oxides, Metal oxides

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