An Investigation of Long-Term Sorption Phenomena
Public Deposited- Last Modified
- February 28, 2019
- Creator
-
Bethea, John H., III
- Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
- Abstract
- Many of the current attempts at predicting the fate and transport of chemicals in the subsurface rely on several questionable assumptions involving the effects of sorption on solute transport: (1)linear isotherms; (2) instantaneous equilibrium; (3) no competitive effects between cosolutes. For accurate predictions to be made, the impact of these phenomena must be understood. Sorption rate and equilibrium experiments were conducted in completely mixed batch reactors for single and bisolute systems of naphthalene and phenanthrene on a native and pulverized version of a subsurface material. In the bisolute system, the concentration of naphthalene was varied while the concentration of phenanthrene was kept constant. Isotherms were best fit with a nonlinear Freundlich model. A suppression of the sorption of naphthalene was observed in the presence of phenanthrene in isotherm data. However, these effects were not evident in rate data. A significant amount of sorption continued over the duration of the 3 month study. Pulverizing the subsurface material resulted in an increased rate of sorption followed by a gradual approach to convergence of the sorption on the pulverized and native material.
- Date of publication
- January 1994
- DOI
- Resource type
- Rights statement
- In Copyright
- Advisor
- DiGiano, Francis A.
- Kamens, R. M.
- Miller, Cass T.
- Degree
- Master of Science in Environmental Engineering
- Academic concentration
- Water Resources Engineering
- Degree granting institution
- University of North Carolina at Chapel Hill
- Graduation year
- 1994
- Language
- Deposit record
- 043fb25a-cea5-4ac2-b0d3-5af4a220fe28
Relations
- Parents:
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