Synthesis of a simplified iron(III) tetraamido macrocyclic ligand (Fe^III-TAML) catalyst and its catalytic activity for degradation of dye wastewater by H₂O₂

Abstract

To reduce the cost of water treatment reagents, a simplified iron(III) tetraamido macrocyclic ligand compound (Fe^III-TAML) was synthesized with a total yield of 53.3%. For comparison, two second generation Fe^III-TAML catalysts were synthesized. The synthetic route was optimized, and the total yield increased from 30.1% to 49.5%. The catalytic activity of the simplified catalyst for degradation of dye wastewater by hydrogen peroxide was tested and compared with that of the second generation Fe^III-TAML catalysts. The experimental results show that the simplified catalyst has good catalytic activity. At 25 °C, pH = 8, C_Fe-TAML = 50 mg/L, and C_{hydrogen peroxide} = 1.5 g/L, the decolorization and chemical oxygen demand removal of methylene blue, methyl orange, neutral red, and Rhodamine B dye wastewater were 74.8%–96.1% and 46.9%–63.7%, respectively.

Graphical Abstract

Keywords:

• Tetraamido macrocyclic ligand
• water treatment
• dye degradation
• COD

Disclosure statement

There are no conflicts of interest to declare.

Acknowledgement

The authors gratefully acknowledge Professor Wang Qing for her contribution to this project.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (No. 21272022).