The change of structural parameters of nanoporous activated carbons under the influence of ultrasonic radiation

Ptashnyk, Vadym; Bordun, Ihor; Malovanyy, Myroslav; Chabecki, Piotr; Pieshkov, Tymofii

doi:10.1007/s13204-020-01393-z

Cited by 14 publications

(5 citation statements)

References 14 publications

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“…where N c 1 , N c 2 , N q 1 , N q 2 -constants; Equation (7) shows that, as for the Langmuir model, there must be a linear relationship between time t and the dependence can be constructed and the tangent of the angle of inclination, which is equal to the…”

Section: Resultsmentioning

confidence: 99%

“…To purify wastewater from ammonia nitrogen, the following methods have become widespread: blown free ammonia, chlorination, ozonation, conversion of ammonium nitrogen NH4 + to molecular nitrogen N2 biologically, removal of ammonium nitrogen by ion exchange, adsorption of ammonium ions, natural dispersions sorbents synthesized from plant raw materials [7,8]. Analysis and comparison from the technical and economic point of view of methods extraction from aqueous solutions allows us to state that the method of ion exchange using natural dispersed sorbents is one of the most effective [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Integrated Process of Ammonium Ion Adsorption by Natural Dispersed Sorbents

Malovanyy

Chornomaz

Bordun

et al. 2022

KEM

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The process of adsorption treatment of effluents from ammonium ions is considered as an integrated two-stage process consisting of the stage of adsorption of contaminants by natural sorbents in the apparatus with a stirrer and the liquid separation stage and solid phases. Mathematical models of ammonium ions adsorption from effluents by natural dispersed sorbents are proposed, based on the assumption that the process is described by Langmuir and Friendlich isotherms. The values of ion exchange equilibrium constants for different types of natural sorbents have been established by identifying experimental data for theoretical dependences. The obtained constants can be used to calculate the average concentration of ammonium ions in the solution and in the grain of the sorbent in the process of integrated adsorption process. Based on the analysis of the research results, the optimum method of the spent sorbent separation was selected - separation of the suspension of purified ammonium-containing effluents - spent sorbent under the action of gravity. Indicators of optimization of complex process of sewage treatment from ammonium ions are offered.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integrated Process of Ammonium Ion Adsorption by Natural Dispersed Sorbents

Malovanyy

Chornomaz

Bordun

et al. 2022

KEM

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“…It is known that biochar has a great potential for intensification of sorption properties after certain improvement operations [24][25][26]. Another factor which increases the attractiveness of the practical use of biochar for the purification of aquatic environments is the prospect of environmentally friendly utilization of the spent sorbent (enriched with organic substances) to increase soil fertility [19].…”

Section: Discussionmentioning

confidence: 99%

Treatment of Real Wastewater from Organic Contaminants by Using Biochar

Baltrėnaitė-Gedienė

Iurchenko

Lebedeva

et al. 2021

MSF

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In a number of water use schemes (water and wastewater treatment), physicochemical treatment methods, in particular adsorption, have been successfully used. However, widespread adoption of these methods is hindered by the high cost of sorbents. One of the promising solutions to these problem of sorption treatment is the use of biochar. Due to its high specific surface area, well-developed porous structure, and surface functionality, biochar has been used as inexpensive adsorbent. The purpose of the laboratory experiments is to determine the sorption properties of biochar obtained from pine – sorption capacity, sorption rate, and purification effect – while removing organic contaminants from real paper mill wastewater. The sorption properties of biochar were studied under static and dynamic conditions, varying the size of the fractions, and processing time. The sorption characteristics of biochar of all the studied fractions were established and it was shown that the most effective sorbent in removing organic contaminants is the 1-biochar’s fraction of (sorption capacity of 11.9 mg of COD per of sorbent). The data obtained enable theoretically substantiate the presence of certain functional groups on the surface of the researched biochar, as well as to develop technological regimes for the treatment of natural and waste waters of a certain composition with its help.

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“…The main threat of eutrophication comes from municipal wastewater, the wastewater from livestock complexes, and the wastewater from some chemical industries. Quite often, biological (Malovanyy et al, 2016b or adsorption (Ptashnyk et al, 2020 methods are used for the final treatment of such waters before discharge into water bodies. However, in the case of biological treatment, there is a problem with the disposal of the resulting activated sludge (Tymchuk et al, 2020 According to both European and Ukrainian legislation, water disposal standards are developed and approved for wateruser-enterprises.…”

Section: Introductionmentioning

confidence: 99%

Standardizing the Wastewater Composition in Order to Minimize the Eutrophication Risk for the Reservoir

Proskurnin,

Tsapko,

Ivashchenko

et al. 2024

J. Ecol. Eng.

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The article strives to determine the allowable content of nutrients in the wastewater that is being discharged into a reservoir, with the end goal of minimizing the risk of eutrophication. It was noted that the methodology currently used in Ukraine and most European countries to control pollutant discharge in wastewater is designed to simply not exceed the permissible pollution level in natural water based on sanitary indicators, which does not guarantee the absence of the eutrophication risk to the water bodies. The article describes a developed method for determining the allowable composition of wastewater based on biogenic indicators. The proposed method takes into account the consecutive transformation of nutrients, the probabilistic nature of the factors that determine the quality of water in water bodies, as well as the cost of purifying wastewater from various pollutants. The problem was considered for the case of wastewater discharge into a reservoir through a watercourse. This research is a practical scientific basis for further improving the methodology for standardization of the wastewater composition in order to protect water bodies from eutrophication.

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The change of structural parameters of nanoporous activated carbons under the influence of ultrasonic radiation

Cited by 14 publications

References 14 publications

Integrated Process of Ammonium Ion Adsorption by Natural Dispersed Sorbents

Integrated Process of Ammonium Ion Adsorption by Natural Dispersed Sorbents

Treatment of Real Wastewater from Organic Contaminants by Using Biochar

Standardizing the Wastewater Composition in Order to Minimize the Eutrophication Risk for the Reservoir

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