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Updated: Jul 9, 2026
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Quantification of Humic and Fulvic Acids in Humate Ores, DOC, Humified Materials and Humic Substance-Containing Commercial Products
Published on: March 18, 2022
Interaction between carbamazepine and humic substances: a fluorescence spectroscopy study
Yingchen Bai1, Fengchang Wu, Congqiang Liu
1State Key Laboratory of Organic Geochemistry, Institute for Geochemistry, Chinese Academy of Sciences, People's Republic of China.
Environmental Toxicology and Chemistry
|December 21, 2007
Summary
Carbamazepine interacts with humic substances in aquatic environments. This study quantifies carbamazepine binding to humic and fulvic acids, offering insights into its environmental fate.
Area of Science:
- Environmental Chemistry
- Aquatic Ecosystems
- Pharmaceuticals
Background:
- Carbamazepine is a widely used pharmaceutical detected in natural waters.
- Its biogeochemical cycling and environmental impact in aquatic ecosystems are poorly understood.
- Humic substances, including fulvic and humic acids, are major organic components in aquatic environments.
Purpose of the Study:
- To investigate the interaction between carbamazepine and humic substances.
- To determine the binding parameters and mechanisms of this interaction.
- To understand the factors influencing carbamazepine's fate in aquatic ecosystems.
Main Methods:
- Three-dimensional excitation-emission matrix fluorescence spectroscopy.
- Synchronous-scan fluorescence spectroscopy.
- Ryan-Weber nonlinear theory for estimating binding parameters.
Main Results:
- Carbamazepine addition quenched the intrinsic fluorescence of humic substances.
- Static quenching was identified as the primary interaction mechanism.
- Conditional binding constants (log K) ranged from 3.41 to 5.04 L/mol at 25°C and pH 7.0.
Conclusions:
- The study elucidates carbamazepine's binding behavior with humic substances.
- Findings contribute to understanding the environmental fate of carbamazepine and other pharmaceuticals.
- This research aids in assessing the biogeochemical cycling of contaminants in aquatic ecosystems.
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