Open AccessFERRITATIVE WASTEWATER TREATMENT FROM CHROMIUM (VI) COMPOUNDS USING ELECTROMAGNETIC PULSE ACTIVATION
Author(s) -
D.V. Pakhomov,
Gennadii Kochetov,
Dmitry Samchenkо
Publication year - 2021
Publication title -
problemi vodopostačannâ, vodovìdvedennâ ta gìdravlìki
Language(s) - English
Resource type - Journals
ISSN - 2524-0021
DOI - 10.32347/2524-0021.2021.37.65-73
Subject(s) - chromium , electromagnetic field , wastewater , magnetite , materials science , magnetic field , pulse duration , metal ions in aqueous solution , pulse (music) , environmental pollution , analytical chemistry (journal) , chemical engineering , metal , metallurgy , environmental science , chemistry , environmental chemistry , environmental engineering , physics , voltage , laser , environmental protection , quantum mechanics , optics , engineering
Issues related to the prospects of implementing the latest technologies aimed at achieving energy efficiency in the field of water supply, resource conservation in material-intensive processes at industrial enterprises and prevention of environmental pollution are considered. A study of ferritative wastewater treatment from chromium compounds, which belong to the first class of danger. The efficiency of thermal and electromagnetic pulse activation of the process is compared. Appropriate experimental setups were developed and the main parameters of the purification process were studied and determined: the ratio of iron (II) and chromium (VI) ions, magnetic field strength, frequency of electromagnetic pulses, ferritization process duration, temperature and pH of the reaction mixture.
The expediency of using electromagnetic pulse activation of the reaction mixture by passing electromagnetic pulses through the reaction mixture has been studied and scientifically substantiated. Rational values of the strength and frequency of the electromagnetic field when using this method of activation, which are 0.01 - 0.14 Tl and 1 Hz, respectively, as well as the ratio of concentrations of heavy metal ions Fe2 + / Cr6 + = 10/1 for washing water chrome plating line . It is shown that purified water meets the requirements of category 1 when reused in production. The results of X-ray diffraction analysis of ferritization sediments showed that stable crystalline phases, such as chromium ferrites and magnetite, are formed with increasing magnetic field strength. The chemical resistance of sludge allows them to be safely disposed of. It is established that this method of electromagnetic pulse activation is not inferior to thermal, and the technical and economic calculations confirmed a significant reduction in industrial costs in its application