A Kinetic Study of the Dissociation of Aluminum Bound to an Aquatic Fulvic Acid
Public Deposited- Last Modified
- February 28, 2019
- Creator
-
Luor, Yi-Taih
- Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
- Abstract
- The disssociation kinetics of alximinum-fulvic acid (Al-FA) as a function of the concentration of fulvic acid, pH, and ionic strength were studied with a fluorescence ligand exchange method using lumogallion. A graphical method and statistical non-linear regression were used for analyzing kinetic data. A two component, five parameters model appeared to fit the data best. For a fixed aluminum concentration, dissociation rates decreased as the concentration of fulvic acid increased and a greater fraction of the total aluminum appeared in the most slowly dissociating component. Increasing pH slightly decreased the dissociation rate. Ionic strength appeared to have no effect. The estimated pseudo-first-order dissociation rate constants for the two components were about 0.1 and 0.01 min(superscript)-1 respectively.
- Date of publication
- January 1989
- DOI
- Resource type
- Rights statement
- In Copyright
- Advisor
- Kuenzler, Edward J.
- Shuman, Mark S.
- Aitken, Michael
- Degree
- Master of Science in Public Health
- Academic concentration
- Environmental Chemistry and Biology
- Degree granting institution
- University of North Carolina at Chapel Hill
- Graduation year
- 1989
- Language
- Deposit record
- ad7e9272-7c4f-43e0-afeb-7a5f2526ad76
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