Journal
ACS OMEGA
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.2c04458
Keywords
-
Categories
Funding
- National Key Research and Development Program of China [2020YFC1807200]
- National Natural Science Foundation of China [41877504]
- Open Fund of National Engineering Laboratory for Site Remediation Technologies [NEL-SRT201902]
Ask authors/readers for more resources
This study used Fe-ZSM-5 zeolite as a catalyst in an electrochemical system to efficiently degrade chlorinated aromatic compounds. Fe-ZSM-5 significantly accelerated the degradation rate and expanded the working pH range. The degradation process was primarily mediated by reductive dechlorination and oxidation. Fe-ZSM-5 exhibited high stability and reusability.
Devising cost-effective electrochemical catalyst system for the efficient degradation of chlorinated aromatic compounds is urgently needed for environmental pollution control. Herein, a Fe-ZSM-5 zeolite was used as a suspended catalyst to facilitate the degradation of lindane as a model chlorinated pesticide in an electrochemical system consisting of the commercial DSA (Ti/RuO2-IrO2) anode and graphite cathode. It was found that the Fe-ZSM-5 zeolite greatly accelerated the degradation of lindane, with the degradation rate constant more than 8 times higher than that without Fe-ZSM-5. In addition, the Fe-ZSM5 zeolite widened the working pH range from 3 to 11, while efficient degradation of lindane in the absence of Fe-ZSM-5 was only obtained at pH <= 5. The degradation of lindane was primarily due to reductive dechlorination mediated by atomic H* followed by (OH)-O-center dot oxidation. Fe-ZSM-5 zeolite could enrich lindane, H*, and (OH)-O-center dot on its surface, thus provided a suitable local environment for lindane degradation. The Fe-ZSM-5 zeolite exhibited high stability and reusability, and reduced the energy consumption. This research provides a potential reduction-oxidation strategy for removing organochlorine compounds through a cost-efficient FeZSM-5 catalytic electrochemical system.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available