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Researchers of Peter the Great St. Petersburg Polytechnic University (SPbPU) have developed a unique device for complex water purification that can improve or, in some cases, replace disinfection with chlorine.
The researchers report an electrolysis unit producing an innovative reagent of sodium ferrate. Researcher Ani Petkova explained that sodium ferrate is capable of decomposing many toxic chemicals into less toxic products and destroying microorganisms, providing the disinfectant effect. According to the researchers, unlike chlorine, the new reagent does not form toxic substances in the process of water purification.
Scientists - Equipment - Cost - Water - Treatment
Scientists believe that the equipment will significantly reduce the cost of water treatment processes. "To disinfect one liter of drinking water in summer, only 0.5 grams of sodium ferrate is required, compared with 4.5 grams of chlorine. In the cold season, 0.2 grams of ferrate are needed, compared with two grams of chlorine," said Petkova. She added that the necessary dose of reagent is reduced approximately to 10 times. The equipment can be used both for the drinking water preparation and for disinfection of industrial and domestic wastewater.
"The water drained into natural water reservoirs can't be treated with chlorine, as it has a long-term effects and forms toxic compounds while interacting with organic matter in rivers and water reservoirs. There is no such problem with...
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