Photocatalytic Activity of the Iron-Containing Natural Composites in the Reaction of Oxidative Destruction of Oxalic Acid and Phenol

Naumova, L. B.; Горленко, Н. П.; Kurzina, Irina

doi:10.3390/environments5010016

Cited by 3 publications

(3 citation statements)

References 19 publications

(29 reference statements)

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“…The "−" sign corresponds to a unidirectional change of D 1 and D 2 relatively D 0 , i.e., D 1 and D 2 > D 0 or D 1 < D 0 , D 2 < D 0 . The "±" sign corresponds to a multidirectional change of D 1 and D 2 relatively D 0 , i.e., D 1 < D 0 and D 2 > D 0 or D 1 > D 0 , D 2 < D 0 [26].…”

Section: Modification Methodsmentioning

confidence: 99%

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Oxidative Destruction of Organic Pollutants on the Polypropylene Fiber Modified by Nanodispersed Iron

et al. 2018

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This study aims to solve the problem of deep destruction of organic pollutants in industrial effluents by creating new composite materials with prescribed functional properties. This paper researches the possibility of using composites based on a polypropylene fiber under conditions of photocatalytic degradation of organic pollutants in aqueous and aqueous-organic media. Dye that are water soluble (eosin, brilliant green, rhodamine C) and fat-soluble (blue, yellow and red) have been chosen as organic contaminants. Composites based on the polypropylene fiber have been obtained by introducing nanodispersed iron onto the surface of the initial polymer, using ion implantation and super high frequency irradiation methods. The obtained composites are characterized, and their photocatalytic activity is studied with respect to the pollutants under study in the conditions of the Fenton-like system and visible radiation. The results show that the obtained composite materials are effective catalysts for oxidative photodestruction of organic dyes in aqueous and aqueous-organic media, and their decolorization degree reaches 80-100%.

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Section: Modification Methodsmentioning

confidence: 99%

“…In our previous work [21][22][23][24][25][26], we showed that the composites, obtained by modifying natural sorbents (zeolites and peat) by metal ions (M n+ ), exhibited high catalytic activity in conditions of UVI and the Ruff-Fenton system during degradation of organic pollutants in aqueous media.…”

Section: Introductionmentioning

confidence: 99%

Oxidative Destruction of Organic Pollutants on the Polypropylene Fiber Modified by Nanodispersed Iron

et al. 2018

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“…Natural zeolites, or, more precisely, natural zeolite-bearing rocks such as zeolitic-rich tuffs, have been widely utilized in various fields pertaining agro-environmental topics [1][2][3][4][5][6][7][8], from the increasing of soil fertility lato sensu to the cleaning of contaminated sites [9][10][11][12][13][14][15][16]. A novel, interdisciplinary field of zeolites application deals with pedotechnologies [17][18][19][20][21][22][23][24][25][26], i.e., a specific branch of soil science devoted to improve or even ex novo restoring the whole soil functions [27,28].…”

Section: Introductionmentioning

confidence: 99%

Modelling the Kinetics of Elements Release from a Zeolitic-Rich Tuff

2020

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The present investigation aims at modeling the kinetics of elements (Fe, Mg, K, Ca, Na, Al, and Si) release from zeolitic-rich Phlegraean Yellow Tuff weathered by tannic acid solutions at different concentration. Three equations were tested—power function, the Weber–Morris model, and the Elovich equation. Power function was revealed to be an excellent empirical equation well fitted to the experimental data. Its numerical parameters were suitable predictive tools, highlighting both the intensity and modality of weathering processes. By paralleling the dissolution rates, it was possible to allow rock-sources from which elements were released during three distinct weathering stages—(i) the first stage was dominated by biotite and amorphous weathering, (ii) the second stage also started with the breakdown of zeolite framework; and (iii) in the third stage, the whole of weathering/release process approached a steady state. Finally, these outcomes may be used to forecast the pedogenic/nutritional potential of zeolitic-rich tuffs as pedotechnical matrices in restoration design.

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Non-Markovian processes in cement systems

Sarkisov

Naumova

Горленко

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Non-Markovian processes occur in nature in the form of the structural organization laws of space-time objects at different scale levels. Non-Markovian processes preserve the memory of the past state of the system, and its further evolution is largely predetermined by information about previous stages of development. This is typical for solid-phase processes, ceramics, metals and alloys, water and aqueous solutions, and other inorganic objects. Non-Markovian process indicators are the natural harmony numbers, Fibonacci numbers and golden ratio. The paper presents evidence of non-Markovian process occurred in cement systems. It is shown that during the formation of the fine-grained crystalline structure the cement system is capable to produce such elements and generate a low-frequency current, which simulates the intensity and duration of the processes. It is shown that the active phase of self-organization in cement systems is of temporary nature as the energy from outside sources is limited.

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Photocatalytic Activity of the Iron-Containing Natural Composites in the Reaction of Oxidative Destruction of Oxalic Acid and Phenol

Cited by 3 publications

References 19 publications

Oxidative Destruction of Organic Pollutants on the Polypropylene Fiber Modified by Nanodispersed Iron

Oxidative Destruction of Organic Pollutants on the Polypropylene Fiber Modified by Nanodispersed Iron

Modelling the Kinetics of Elements Release from a Zeolitic-Rich Tuff

Non-Markovian processes in cement systems

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