International team of researchers develops new method for removing textile dyes from wastewater

Researchers from the South Ural State University, a partner of TV BRICS, have developed and tested an electrochemical water treatment system designed to remove persistent textile dyes from wastewater. The study was carried out in collaboration with international scientists and focuses on improving the purification of industrial effluents, as reported by the university's website.

Textile dyes are widely used in fabric production due to their strong adhesion to fibres. However, once they enter wastewater, they remain stable in the environment, reduce light penetration in water bodies, and pose risks to aquatic ecosystems because of their resistance to natural degradation.

The researchers proposed an electrochemical approach in which 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 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 young researcher at South Ural State 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 colourless 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 believe 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 further improving the design.