Recycling of iron-rich sediment for surface modification of filters for underground water deironing

Romanovski, Valentin; Romanovskaia, Elena; Moskovskikh, Dmitry; Kuskov, Kirill; Likhavitski, V. V.; Arslan, Mehmet Faruk; Beloshapkin, Sergey; Мацукевич, И. В.; Khort, Alexander

doi:10.1016/j.jece.2021.105712

Cited by 27 publications

(8 citation statements)

References 21 publications

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“…Waste recycling is one of the most important challenges for green chemistry, circular economies and sustainable development. 1,2 Wastes are often used in the production of materials for various purposes: modified materials for water treatment, [3][4][5] wastewater treatment, 6,7 recovery of metals, 8 pigments 9,10 as well as building materials, such as gypsum, [11][12][13] anhydrite, 14,15 binders, 16 bricks, 17,18 composites, [19][20][21][22] etc.…”

Section: Introductionmentioning

confidence: 99%

Paper industry slag for the production of building ceramics

Zalyhina

Cheprasova

Romanovski

2022

J of Chemical Tech & Biotech

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Background Re‐use of wastes as a part of sustainable development is one of the most important aspects of a healthy human life and environmental protection. This study examines the viability of using paper industry slag for the production of building ceramics. Results Paper industry slag was used in the production of ceramic bricks as a burnable additive in amounts of 5, 10 and 15 wt%. The slag was introduced without and after three different preparatory operations: dried, dried and ground, granulated and dried. Clay was used as a raw material and quartz sand as a lean additive. The samples were made by plastic molding. Drying was carried out at a temperature of 100 °C. To determine the optimal heat treatment temperature, firing was carried out at 900, 950, 1000 and 1050 °C with holding at the maximum temperature for 30 min, followed by determination of the properties of the samples. Conclusions It has been established that the samples obtained using the slag have good physical and mechanical properties and comply with current standards. At the same time, the use of slag in the production of ceramic bricks makes it possible to solve the problem of waste management, as well as to obtain a secondary material resource from the slag – a burnable additive, which leads to savings in raw materials and energy resources in the production of ceramic bricks. © 2022 The Authors. Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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Section: Introductionmentioning

confidence: 99%

Paper industry slag for the production of building ceramics

Zalyhina

Cheprasova

Romanovski

2022

J of Chemical Tech & Biotech

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“…Such approaches include the circulation of material flows and waste recycling [1][2][3] and metals recovery. [4][5][6][7] Enrichment of ores or slags in order to remove ballast substances from them and increase the content of the target component is an important process. 8 Titanium metal, titanium alloys and titanium dioxide are the most in-demand titanium-containing products on the world market.…”

Section: Introductionmentioning

confidence: 99%

A novel low‐energy approach to leucoxene concentrate desiliconization by ammonium bifluoride solutions

Смороков

Kantaev

Bryankin

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND: Despite the large reserves of titanium ores, their treatment by basic approaches to obtain titanium products is not always economically feasible due to various factors. One of these problems is the high content of silicon in the ores. RESULTS:The paper considers the desiliconization of a leucoxene concentrate with an aqueous solution of ammonium bifluoride. It was found that at 80 °C the main impurities, such as silicon and iron, pass into solution in the form of corresponding ammonium-fluorine complex compounds.CONCLUSIONS: The degree of desiliconization was up to 99%. Aluminium reacts with ammonium bifluoride, but is almost not leached into solution due to its low solubility. Titanium does not react due to its relatively higher reaction Gibbs energy among other metals in reaction with ammonium bifluoride. The content of titanium oxide in the calcined leaching residue was 85.52 wt%. The resulting residue corresponds to the raw material used in industry for the production of titanium dioxide pigment or titanium metal by the chlorine method. Iron and silicon can be precipitated from the leaching solution. Furthermore, the resulting filtrate can be evaporated in order to regenerate and reuse ammonium bifluoride.

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“…Воды в них характеризуются преимуще ственно повышенным содержанием железа, мар ганца, мышьяка в зависимости от состава пород, в которых они находятся. Очистка от данных катионов зачастую ограничивается упрощенной аэрацией и фильтрованием через зернистые за грузки [1][2][3].…”

Section: Introductionunclassified

Production of synthetic gypsum from water treatment wastes, i. e., incompletely burned lime

Комаров¹,

Романовский²

2022

Vodosnabzhenie I Sanitarnaia Tehnika

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Синтетический гипс – материал, который получается в результате взаимодействия серной кислоты и карбонатсодержащих материалов. Он является перспективным аналогом природного гипса для тех стран, у которых нет месторождений природного гипсового камня. Синтетический гипс, полученный на основе недопала извести, можно отнести к первому сорту гипса, однако существуют существенные отличия от природного гипса, что подтверждается результатами дифференциального термического анализа. Основные пики эффектов сдвинуты в меньшую сторону на 30–50 °С, что связано с более высокой реакционной способностью синтезированного материала. При производстве синтетического гипса образуется побочный продукт – фильтрат, который содержит в своем составе соли (сульфаты) натрия, калия, магния, что открывает возможность использования его в качестве комплексного микроудобрения. Synthetic gypsum is a material that is produced in the process of sulfuric acid interacting with carbonate-containing materials. It is a promising analogue of natural gypsum for those countries that do not have deposits of natural gypsum stone. Synthetic gypsum produced on the basis of incompletely burned lime, can be attributed to the first grade of gypsum; however, there are significant differences from natural gypsum confirmed by the results of differential thermal analysis. The main peaks of the effects are shifted down by 30–50°C owing to the higher reactivity of the synthesized material. In the production of synthetic gypsum, a by-product is generated, i. e., a filtrate that contains salts (sulfates) of sodium, potassium, magnesium, which opens up the possibility of using it as a complex micro fertilizer.

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Recycling of iron-rich sediment for surface modification of filters for underground water deironing

Cited by 27 publications

References 21 publications

Paper industry slag for the production of building ceramics

Paper industry slag for the production of building ceramics

A novel low‐energy approach to leucoxene concentrate desiliconization by ammonium bifluoride solutions

Production of synthetic gypsum from water treatment wastes, i. e., incompletely burned lime

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