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Гальванотехника и обработка поверхности №3 за 2018

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Выпуск № 3 за 2018 год

     Российское общество гальванотехников и специалистов в области обработки поверхности

Содержание журнала №3 за 2018 год

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Раздел/SectionЭкология и ресурсосбережениеEnvironment and Resources Saving

Методы удаления ионов Fe(II) из воды: теория и практика

Surway. Removal of Fe (II) ions from water: theory and practice

Авторы/AuthorsХарламова Т.А., Алафердов А.Ф., Маслова О.В., Петренко Д.Б.Kharlamova T.A., Alaferdov A.F., Maslova O.V., Petrenko D.B.
Ключевые слова
ионы Fe (II), обезжелезивание, аэрация, озонирование, электрохимические методы, адсорбционный метод, биологический метод, Fe (II) ions, removal of iron ions, aeration, ozonation, electrochemical methods, adsorption method, biological method
Настоящий обзор посвящен очистке природных вод от ионов Fe(II). Рассмотрены теоретические и практические аспекты современного состояния данного вопроса на основе анализа литературы за последние 7-10 лет. Обсуждаются новые данные научных исследований, включая комбинированные способы, направленные на повышение эффективности процесса.This article is a surway of publications on the purification of natural waters from Fe (II) cations, which considers the theoretical and practical aspects of the current state of this problem on the basis of literature analysis for the last 7-10 years. One of the important tasks in the processes of water preparation for the needs of drinking and technical water supply is the removal of dissolved iron compounds, which can exist as dissolved, colloidal and suspended particles depending on the degree of oxidation, pH, and their chemical nature. The increased content of iron ions in water may worsen the quality of rinsing operations in plating shops and has a harmful effect on humans. According to "Hygienic requirements and standards of drinking water quality" the concentration of iron in water should not exceed 0.3 mg / l. The article discusses the data of the latest scientific research, including combined methods aimed at increasing the efficiency of the process, since the removal of the dissolved form of iron from water is a complex technological process and consists of several stages. The use of traditional methods of deironing, primarily with the use of reagents-oxidants (oxygen, ozone, hypochlorite, etc.) has its advantages and disadvantages. Therefore, methods for intensifying oxidation-reduction reactions in the processes of removing Fe (II) ions have been developed: aerating, using membranes with a certain porosity, cavitation, oxidation of iron (II) on ruthenium-titanium oxide anodes, using high-frequency ultrasound together with hydrogen peroxide and etc. It has been established that the rate of oxidation of iron (II) in water depends significantly on the pH, water composition, and decreases with decreasing impurity content in it. .Perspective directions of electrochemical technologies include electroflotation, electrocoagulation, discharge technologies. Electrochemical technologies have many advantages. Recent research includes also adsorption technologies with the use of agricultural waste as adsorbents, as well as biosorbents and nanomaterials. Methods of biological oxidation, biological removal of iron ions are associated with oxidation by microorganisms. The method of biochemical oxidation is one of the cheapest and safest, but the use of microorganisms requires compliance with a certain temperature regime and increased control over their vital activity. Despite the fact that many methods have been successfully used on an industrial scale, scientific and design work is continuing in order to improve them.
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