Activated Carbon Modifications for Heterogeneous Fenton-Like Catalysis
P Compton1, N R Dehkordi1, P Larese Casanova1
1Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, USA.
Journal of Chemical Engineering and Catalysis
|April 17, 2023
Summary
This study introduces a cost-effective manganese dioxide-activated carbon catalyst (AC-Mn5) for advanced oxidation processes. This heterogeneous catalyst efficiently degrades pollutants by generating hydroxyl radicals, offering a promising alternative to traditional Fenton chemistry.
Area of Science:
- Environmental Chemistry
- Materials Science
Background:
- Advanced oxidation processes (AOPs) are crucial for degrading persistent pollutants in hazardous waste and water remediation.
- Fenton chemistry, an AOP, can be improved using heterogeneous catalysts to overcome limitations of traditional methods.
Purpose of the Study:
- To optimize heterogeneous catalysts for Fenton-like chemistry using activated carbon and nanomaterials.
- To develop a cost-effective and technically viable AOP for pollutant degradation.
Main Methods:
- Synthesized heterogeneous catalysts by doping activated carbon with Fenton-like nanomaterials.
- Tested catalyst performance in generating hydroxyl radicals and degrading benzoic acid in the presence of H2O2.
- Evaluated catalyst efficiency under varying H2O2 concentrations, synthesis methods, pH, and after simulated aging.
Main Results:
- Activated carbon impregnated with 5% manganese dioxide (AC-Mn5) showed high hydroxyl radical formation and pollutant removal.
- The AC-Mn5 catalyst demonstrated effectiveness across various conditions, including acidic pH, and maintained performance after aging.
- This catalyst offers a low-cost, easily synthesized alternative to traditional iron-based Fenton reagents.
Conclusions:
- The AC-Mn5 catalyst is a promising heterogeneous material for efficient and cost-effective pollutant degradation via advanced oxidation processes.
- This approach offers a scalable solution for removing persistent pollutants, potentially replacing conventional Fenton chemistry.
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