Abstract
Due to the growth of man-caused pollution, there is a need to use modern methods of water purification. It is advisable to use sorption methods for the extraction of heavy metals, which are considered to be particularly dangerous. It is established that sorbents based on magnetite are quite effective in the extraction of copper ions. It is shown that the sorption capacity of magnetite-based sorbents towards copper ions depends on the ratio of concentrations of Fe2+ and Fe3+ ions in the reaction mixture, and increases with increasing this indicator from 1/2 to 2. The sorption capacity of the sorbent towards copper ions increases by 4.4 times. It is shown that the efficiency of copper ions removal onto magnetite increases for sorbent modified with sodium sulfide. The proposed scheme provides the possibility of sorption treatment of large volumes of water from copper ions to the norms for the discharge of wastewater into fishery reservoirs. Post-productional magnetite is dehydrated and supplied to metallurgical enterprises for processing. The developed technology of water purification from copper ions is environmentally safe and energy efficient.
Highlights
The end of the XX and the beginning of the XXI century were marked by both scientific and technical achievements and a significant deterioration of the environment as a result of massive pollution
Magnetite obtained at a ratio of iron (II) and iron (III) ions in the reaction mixture of 1 : 2 is used, it is known that with increasing iron (II) content, magnetite has a more amorphous structure, which should affect its sorption capacity
Magnetite was used in this work, at a ratio of Fe (II) / Fe (III) 1 : 2; 1 : 1 and 2 : 1. To increase the sorption capacity of magnetite, sodium sulfide was added at a concentration of 1 and 2 %
Summary
The end of the XX and the beginning of the XXI century were marked by both scientific and technical achievements and a significant deterioration of the environment as a result of massive pollution. The problem of protection of hydro-ecosystems from pollution in Ukraine is especially acute, where, despite the decline in industrial production, the intensity of natural water pollution is growing [1–4]. The problem of pollution of water bodies with pollutants of various natures is arising in many countries around the world. Heavy metals come to natural sources with effluents from various enterprises (galvanic, instrument-making and chemical industries, mining and processing plants and thermal power plants). A significant increase in the allowable discharges of heavy metal ions is observed in the discharges of nuclear power plants [5–9]
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