New “green” water purification technologies: combined filtration systems using higher aquatic plants with deep electrochemical purification and oxidation with chlorine dioxide

This study presents an innovative green water purification technology that combines electrochemical oxidation and biological treatment methods for the effective removal of contaminants and water disinfection.A key feature of the system is the autonomous synthesis of chlorine dioxide using a diaphragm electrolyzer.Chlorine dioxide acts as a powerful oxidizing agent capable of neutralizing a wide range of pathogenic microorganisms without generating harmful by-products, which is a major limitation of traditional chlorination processes.The proposed system also incorporates higher aquatic plants for the phytoremediation of nitrogenous compounds, phosphorus, and other complex pollutants, providing a natural and sustainable approach to water treatment.The integrated modular system includes multiple purification stages: preliminary mechanical filtration, filtration through the rhizomes of higher aquatic plants, electrochemical treatment, and a final stage of bioengineered phytodesalination.The hydroponic bioplateau filter not only purifies water but also ensures its ongoing regeneration and partial desalination by absorbing excess minerals.The entire process is autonomous, does not require chemical reagents, and is powered by renewable natural resources and solar energy.Field experiments confirm the system's efficiency, demonstrating up to 67% reduction in salt content and complete microbial disinfection of brackish water with a salinity of 2.5-3.5 g/dm.These results highlight the high potential of the proposed technology for decentralized, environmentally safe, and sustainable water purification in various settings, including remote or ecologically sensitive areas.The technology represents a promising direction in the development of low-impact, energy-efficient, and reagent-free water treatment systems.Key words: chlorine dioxide