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Diclofenac removal by pyrite-Fenton process: Performance in batch and fixed-bed continuous flow systems
1Canakkale Onsekiz Mart University, Department of Environmental Engineering, 17020 Canakkale, Turkey.
The Science of the Total Environment
|February 16, 2019
Summary
The pyrite-Fenton process effectively degrades diclofenac, with removal efficiency influenced by reactant concentrations and iron dissolution. Optimizing conditions minimizes scavenging effects for sustained pollutant removal.
Area of Science:
- Environmental Chemistry
- Water Treatment Technologies
Background:
- Diclofenac is a persistent pharmaceutical pollutant in water bodies.
- The pyrite-Fenton process offers a potential method for its degradation.
Purpose of the Study:
- To investigate diclofenac degradation using the pyrite-Fenton process.
- To evaluate the impact of chemical conditions on degradation efficiency.
Main Methods:
- Batch and column studies were conducted.
- Variable concentrations of pyrite and hydrogen peroxide were tested.
- The effect of chelating agents and iron dissolution was analyzed.
Main Results:
- Diclofenac removal increased with higher pyrite and hydrogen peroxide concentrations.
- Chelating agents and excess Fe(II) reduced removal efficiency by scavenging hydroxyl radicals.
- Optimal conditions achieved 100% diclofenac removal.
Conclusions:
- Diclofenac degradation by pyrite-Fenton is primarily driven by hydroxyl radical attack.
- Controlling iron dissolution and minimizing scavenging effects are crucial for efficient diclofenac removal.
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