Environmental Problems. – 2021. – Vol. 6, No. 1

Permanent URI for this collectionhttps://ena.lpnu.ua/handle/ntb/57997

Науковий журнал

Засновник і видавець Національний університет «Львівська політехніка». Виходить двічі на рік з 2016 року.

Environmental Problems = Екологічні проблеми : [науковий журнал] / Lviv Polytechnic National University ; [editor-in-chief M. Malovanyy]. – Lviv : Lviv Politechnic Publishing House, 2021. – Volume 6, number 1. – 59 р. : ill.

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Content (Vol. 1, No 6)


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    Apparatus-technological scheme of tin cans scrap recycling with obtaining technical products
    (Видавництво Львівської політехніки, 2021-03-03) Dmitrikov, Valerii; Vakal, Serhii; Vakal, Viktoriia; Pliatsuk, Leonid; Poltava State Agrarian Academy; Scientific-Research Institute of Mineral Fertilizers and Pigments of Sumy State University
    The article is devoted to the study of reducing the technogenic load on the environment due to the integrated processing of household metal scrap. A waste-free, resource saving, and environmentally safe method is proposed for extracting technical products from tin cans scrap – iron (III) oxide, tin (II) complex, suitable for further use, a mixture of ammonium and sodium nitrates as fertilizer for agriculture. As a result of theoretical and experimental studies, the direction of cans scrap recycling was selected with an assessment of the parameters and factors affecting the reagent process of scrap disposal. To verify the proposed method for can scrap processing in experimental studies, the reagent method and physical modeling were used together. The processes of the reagent can scrap recycling were studied in a laboratory installation. The results of studies on the reagent can scrap processing with the individual component allocation in the form of their derivatives are presented. A block diagram and a hardware-technological scheme for scrap processing with the receipt of technical products have been developed. The possibility of processing other metal-containing wastes according to the proposed scheme is shown.
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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.