Browsing by Author "Gil, Zinaida"

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    Advanced technologies for processing liquid waste of galurgical productions
    (Видавництво Львівської політехніки, 2021-03-03) Mykhaylenko, Volodymyr; Yurchenko, Valentyna; Antonov, Oleksiy; Lukianova, Olha; Gil, Zinaida; A. Podgorny Institute for Mechanical Engineering Problems NAS of Ukraine; Kharkiv National Universityof Civil Engineering and Architecture
    The accumulation of highly mineralized waters and brines in the mining-industrial regions of Ukraine carry a threat of salt pollution of underground and surface water sources. Low-waste processing of these waters is prevented by iron compounds, hydrogen sulfide and sulfur-containing organic compounds. The process of accumulation of iron compounds in brines and groundwater in the presence of hydrogen sulfide has been studied. Comparative calculations of the thermodynamic potentials of the corresponding reactions have been carried out. The calculation results are confirmed by experiments on model solutions and brine of the Dombrovsky quarry. To remove iron compounds from brines and other highly mineralized waters, it is proposed to use electrolysis with inert anodes. It was found that 99.9 % of iron compounds pass into the precipitate of iron hydroxide (III). At the same time, the overwhelming amount of heavy metals also passes into the sediment.
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    Environmentally Safe Technology for Preparing Metal Oxide Anode
    (Видавництво Львівської політехніки, 2022-03-01) Mykhaylenko, Volodymyr; Gil, Zinaida; Lukianov, Yevgeniy; Lukianova, Olha; Khinevich, Oleksandr; Antonov, Oleksiy; National Academy of Sciences of Ukraine
    The article is devoted to the development of lowwaste environmentally safe technology for the production of combined metal oxide anodes. Low waste is realized due to recycling of nitrogen oxides and heavy metal compounds. It is established that the depth of purification of air from nitrogen oxides with water with neutralization of nitric acid with manganese carbonate exceeds 95 %. It was determined that the residual concentrations of heavy metals of lead and copper in treated wastewater do not exceed, respectively, 0.002 and 0.06 mg/m3. The resulting manganese nitrate and lead and copper hydroxides are returned to anode production.