Development of Technology for Obtaining Sorbents Based on Bentonite Clays for Ater Purification Systems

Koshelev, Аleksey Vasilievich; “GosNIIOKhT”, Fsue; Vedeneeva, N. V.; Zamatyrina, Valentina Alekseevna; Tikhomirova, E. I.; Skidanov, Eugeniy Viktorovich; “Lisscon”, Llc Lns

doi:10.23968/2305-3488.2018.20.2.32-39

Cited by 7 publications

(6 citation statements)

References 3 publications

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“…The heat treatment of the obtained particulates took 2 hours at 550 0 С -600 0 С. Due to the optimal heat treatment mode it is possible to obtain particulates with a developed surface and water resistant in a wide рН range [14].…”

Section: Methodsmentioning

confidence: 99%

Development of Innovative Filtration System for Natural Water Treatment in the Chechen Republic

Ataeva¹,

Abubakarova²,

Тихомирова³

et al. 2019

Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" Dedicated to the

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There is a pressing need for high-quality water supply to the population of Grozny. This is due to a specific mixture of salts of heavy metals and lithium, and microbial contamination in the surface water reservoirs. To ensure effective purification of severely polluted surface water, it is necessary to improve filtration systems with a disinfecting effect. The paper describes a method for producing bentonite-and brucite-based sorbent with improved adsorption properties to provide effective water treatment in the Chechen Republic. The authors propose some solutions for combined multilayer filtration systems. The paper presents a method for adsorption water treatment, which implies adsorbing chemical contaminants on mineral granules of high absorption capacity, with a disinfectant to provide an antimicrobial effect. The treatment effectiveness of water from the surface water reservoirs in the city of Grozny, particularly Chernorechensky, Goyta and Sunzha, is assessed in the laboratory with the developed filtration systems. The paper justifies a decrease in color by 96%, turbidity by 99% and 100% iron absorption as well as microbial pollutant extraction using the developed filtration system with improved adsorption properties.

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Section: Methodsmentioning

confidence: 99%

Development of Innovative Filtration System for Natural Water Treatment in the Chechen Republic

Ataeva¹,

Abubakarova²,

Тихомирова³

et al. 2019

Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" Dedicated to the

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“…Currently, research is being actively conducted on the development of sorption materials based on natural aluminosilicates: bentonite, montmorillonite, cambrian clay, etc. [4,5].…”

Section: Introductionmentioning

confidence: 99%

Development of composition and study of sorbent properties based on saponite

Zubkova

Pyagay

Pankratieva

et al. 2023

PMI

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The development of a comprehensive approach to preventing the pollution of natural objects is necessary due to the high requirements of environmental legislation for the discharge of industrial wastewater. Adsorbents are used in various industries to extract heavy metals from wastewater. In this study the possibility of using saponite clay as a raw material for the production of sorbent for the extraction of copper ions Cu2+ from industrial wastewater is considered, a recipe and technology of sorbent production are developed, and its chemical composition is established. It has been established that the optimum temperature for heat treatment of the sorbent and corresponds to 550 ºC, since at this temperature saponite extrudates acquire strength (strength 34.1 kg/mm2) and textural properties (specific surface area of pellets 22.803 m2/g), allowing them to be used as sorbents. The kinetics of molecular adsorption was studied using model solutions of copper (II) sulfate. The extraction efficiency of copper (II) ions from the model solutions is 93 %. Extraction efficiency of copper (II) ions from copper plating wastewater reaches 94 %. SEM results confirm the presence of metal on the sorbent surface.

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“…Bentonites are authigenic mineral formations of sedimentary rocks belonging to the class of aluminosilicates [1]. The main mineral component of bentonite is a layered two-dimensional dioctahedral smectitemontmorillonite (ММT) Мx/n n+ [Al4-xMgx](Si8)O20(OH)4, which has an elementary structural layer of the 2:1 type, consisting of two tetrahedral and an octahedral meshes located between them [2]. Due to isomorphic substitutions of cations in the octahedral and tetrahedral positions of the MMT meshes, a negative charge of the layer of 0.4-0.6 e.u.…”

Section: Introductionmentioning

confidence: 99%

“…In this regard, increasing the adsorption properties of bentonites is an urgent task, the solution of which will expand the directions of their use as inexpensive natural adsorbents. For example, for the purification of industrial wastewater from heavy metal ions after their treatment with special reagents, since chemical precipitation is not productive enough when pollutants are in trace amounts [2,5].…”

Section: Introductionmentioning

confidence: 99%

Transformation of the structure and adsorption properties of bentonite during physical and chemical treatment

Buntin

Agliullin

2022

J. Phys.: Conf. Ser.

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The paper presents the results of studies of the effect of electromagnetic, ultrasonic and acid treatments on the structure and the adsorption index of alkaline-earth bentonite modified with nanoparticles of silicon oxide and aluminum. Studies have shown that electromagnetic, ultrasonic and acid treatments contribute to an increase in the adsorption capacity of bentonite modified with nanoparticles of silicon oxide by 5, 10, and 25%, respectively. Modification of bentonite with stabilized nanodispersed hydrosols of amorphous silicon oxide (6-10.5 nm) and crystalline boehmite (3.5-4 nm) of 0.1-0.5 wt. % with subsequent ultrasonic and microwave treatments allows to increase its adsorption index for methylene blue and the cation exchange capacity up to 40%. And during the combining with preliminary activation in suspension with sodium carbonate it allows to increase up to 80%. The increase in the adsorption properties of bentonite is due to a double increase in the homogeneity of the structure, dispersion and specific surface area of aluminosilicate particles and transformations of the phase composition. As a result, through the use of advances in the field of nanotechnology, a combining of physical and chemical effects, the technology of modifying natural aluminosilicates based on bentonite has been improved, which makes it possible to significantly increase the adsorption characteristics of materials based on it.

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Development of Technology for Obtaining Sorbents Based on Bentonite Clays for Ater Purification Systems

Cited by 7 publications

References 3 publications

Development of Innovative Filtration System for Natural Water Treatment in the Chechen Republic

Development of Innovative Filtration System for Natural Water Treatment in the Chechen Republic

Development of composition and study of sorbent properties based on saponite

Transformation of the structure and adsorption properties of bentonite during physical and chemical treatment

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