Recently, Professor Cai Yaqi from the State Key Laboratory of Environmental Chemistry and Ecotoxicology of the Center for Ecological Environment Research of the Chinese Academy of Sciences published the title of "Superoxide ion radiols mediated degradation of tetrachlorotropic acid in biochars-FexP@Fe-FexC /The article "O2 system with excellent reactivity durability" reports a novel iron-based catalyst（ SL-FexP@Fe-FexC ）Through the degradation reaction mediated by superoxide anion radicals (O2-), the difficult to degrade organic pollutant 3,4,5,6-tetrachloropyridinecarboxylic acid (TCPA) in water is removed. This study used the Shenghan CLC-3200 high-performance liquid chromatography system to determine the degradation efficiency of TCPA, detect degradation intermediates, and evaluate the stability of the catalyst, providing important data support for the experiment.

Research background

Zero valent iron (ZVI) technology has been widely used in wastewater treatment and soil remediation due to its low cost, high efficiency, and non toxicity. Zero valent iron (ZVI) activates oxygen to generate reactive oxygen species (ROS) in situ, providing a promising low-carbon and "green" technology for water purification. However, the low production and easy deactivation of ROS limit its engineering application in the elimination of organic pollutants.

PART2 Process and Conclusion

This study successfully prepared a novel iron-based catalyst（ SL-FexP@Fe-FexC ）It has a core/shell structure and Fe (II) regeneration ability, which can efficiently degrade organic pollutants in water (such as 3,4,5,6-tetrachloropyridinecarboxylic acid, TCPA). This catalyst exhibits excellent degradation efficiency and stability in a wide pH range (pH 3-10) and different salt solutions, and maintains high activity even after multiple cycles of use. Through EPR and electrochemical experiments, it has been confirmed that O2- radicals are the main active species for TCPA degradation, and the rapid electron transfer of Fe (II)/O2 reaction and the strong affinity of O2 are the key factors for the efficient performance of the catalyst. In addition, the dual coating of biochar and FexP effectively slows down the consumption of active Fe and FexC, further enhancing the durability of the catalyst. It can serve as an ideal catalyst for efficient degradation of organic pollutants and is of great significance for the detection and treatment of organic pollutants in water environments.

During the research process, the Shenghan CLC-3200 high-performance liquid chromatography system and ultraviolet detector were used to quantitatively analyze the concentration changes of TCPA (3,4,5,6-tetrachloropyridinecarboxylic acid), in order to evaluate its effectiveness SL-FexP@Fe-FexC The degradation effect of catalysts on TCPA provides key data support for evaluating the degradation performance of catalysts, studying reaction kinetics, and optimizing experimental conditions.

The SHINE CLC-3200 high-performance liquid chromatography series has the characteristics of high sensitivity, high stability, and flexible configuration, and is widely used in various fields such as environmental monitoring, food safety, life sciences, chemical engineering, and materials science.

This study not only developed an efficient and stable iron-based catalyst, but also provided new insights into the degradation mechanism of organic pollutants and catalyst design, which has important environmental, economic, and social significance.

Water Research

Water Research is an international top tier journal in the field of environmental science and engineering (published by Elsevier), renowned for its high impact (2022 Impact Factor 13.4), rigorous academic standards, and extensive disciplinary coverage, consistently ranking among the top journals in the environmental field. It focuses on research directions such as water treatment technology, pollutant degradation, and water quality monitoring. The published results need to be innovative and have practical value. The acceptance rate is low and the citation rate of papers is extremely high,.