Organic pollutant sorption onto dissolved and sorbed humics, fulvics and humin
- Univ. of Texas, Austin, TX (United States)
An investigation was performed on the importance of adsorption and desorption of neutral organic pollutants onto solids and onto the natural humic and fulvic dissolved organic materials which reversibly partition onto solids. The partitioning of dichlorobenzene onto humin attached to soils, fulvic and humic acids adsorbed to solids, arid fulvic and humic acids in solution was used to explain the non-ideal behavior of apparent sorption coefficient as determined by batch equilibrium experiments. The sorption of fulvic acid and sorption of humic acids onto soils were found to follow Langmuir isotherms. The sorption isotherms of dichlorobenzene onto dissolved humics and fulvics and particulate humic, fulvic, and humin materials were found to be linear, and greatest for sorption onto the fulvic fractions. The true sorption coefficient of dichlorobenzene to these five types of natural organic matter was found to be both linear and reversible. Modeling of the transport of pollutants facilitated by sorption onto dissolved natural organic materials should include the non-linear sorption of the humic and fulvic materials onto solids.
- OSTI ID:
- 40057
- Report Number(s):
- CONF-9410273--
- Country of Publication:
- United States
- Language:
- English
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