Researchers at Russia’s South Ural State University have developed an electrochemical water treatment system designed to remove persistent textile dyes from wastewater. The study, done in collaboration with international scientists, focuses on improving the purification of industrial effluents, the university said.

Textile dyes, while essential in fabric production, pose significant environmental challenges. Once discharged into wastewater, these compounds remain persistent, reducing light penetration in water bodies and threatening aquatic ecosystems due to their resistance to natural degradation.

The team proposed an electrochemical approach: The contaminated water flows through a treatment system while an electric current generates reactive particles on the surface of a specially designed electrode. These particles break down the dye molecules, enabling efficient purification without the need for additional chemical reagents.

"The main feature of this development is its flow-through design. The water isn’t simply contained in a laboratory vessel; it flows through the reactor. This brings the system closer to the real-world conditions of industrial effluent treatment," explained Vladislav Fadeev, a researcher at the university.

The team also employed a multilayer electrode incorporating a holmium-modified active layer, enhancing both purification efficiency and durability during repeated use.

Laboratory tests showed that the dye solution became completely colorless within 90 minutes. The system maintained almost unchanged performance after 15 consecutive treatment cycles, demonstrating its stability and potential for long-term operation.

The researchers think the technology could support the development of compact water treatment systems for removing persistent organic pollutants. Future work will focus on testing the approach with real industrial wastewater and improving the design.