Sorption properties of plasma-modified flax fibers

Никифорова, Т. Е.; Bagrovskaya, N. A.; Козлов, В. А.; Natareev, S. V.

doi:10.1134/s1070427208070094

Cited by 8 publications

(6 citation statements)

References 3 publications

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“…Установлено, что в области низких равновесных концентраций ионов цинка в растворе (0,001-0,02 моль/дм 3 ) полученные изотермы с высокой достоверностью описываются уравнением адсорбции Фрейндлиха [12] А = b(Ср) При более высоких значениях равновесных концентраций металла в пробе (0,02-0,04 моль/дм 3 ) уравнение изотермы адсорбции Лэнгмюра хорошо отражает количественную зависимость сорбционной зависимости исследуемых образцов от содержания ионов цинка в воде. В общем виде уравнение изотермы мономолекулярной адсорбции Лэнгмюра имеет вид [5,12]:…”

Section: результаты исследованийunclassified

“…Полученные нами результаты подтверждаются данными, представленными другими авторами [5], в работах которых также указывается о невозможности применения только одной математической зависимости для описания экспериментально полученных изотерм адсорбции при использовании в качестве сорбента различных целлюлозосодержащих материалов. В качестве механизмов связывания ионов цинка образцами древесных опилок можно предположить ионный обмен с участием карбои гидроксильных групп целлюлозосодержащего материала, а также физическую адсорбцию.…”

Section: результаты исследованийunclassified

“…Исследования по применению в качестве сорбционных материалов отходов растительного сырья свидетельствуют о возможности получения высокоэффективных и дешевых сорбентов [5][6][7][8][9]. Растительное сырье характеризуется широким разнообразием, его относят к категории возобновляемых природных ресурсов.…”

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Production of cellulose-containing sorption materials for wastewater treatment from heavy metal ions

Shibeka,

Mytsko

2023

TKSC RAS

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The results of the study of various methods of treatment of sawdust on their sorption properties are presented. It was found that treatment of the initial sorbent with hydrochloric acid solution, ultrahigh-frequency radiation and ultrasound leads to an increase in the sorption capacity of the material. It has been found that the process of zinc ions sorption from water by sawdust sorbents can be described by means of two dependences: the Freundlich adsorption equation (for the equilibrium range of metal ions 0,001– 0,02 mol/dm3) and the Langmuir monomolecular adsorption (0,02–0,04 mol/dm3). It was shown that the mechanisms of zinc ion binding by sawdust samples are ionic exchange involving carboxyl and hydroxyl groups as well as physical adsorption.

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Section: результаты исследованийunclassified

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Production of cellulose-containing sorption materials for wastewater treatment from heavy metal ions

Shibeka,

Mytsko

2023

TKSC RAS

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“…To develop new sorbents with improved sorption properties for the extraction of heavy metal ions, it is very important to choose an appropriate method for processing polysaccharide-based materials. Many methods, such as mechanical, physical, physicochemical, chemical, and biochemical approaches, have been proposed by various authors [11,[26][27][28][29] to modify cellulose-based polymers, including flax fibers [27,29]. A promising method for modifying cellulose-containing sorbents is chemical modification, which can be conducted with inexpensive and accessible reagents, such as organic and mineral acids, bases, organic compounds, and oxidants.…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Ions(II) Sorption by a Cellulose-Based Sorbent Containing Sulfogroups

Nikiforova,

Kozlov,

Razgovorov

et al. 2023

Polymers

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This article concerns the effect of the chemical modification of short flax fiber on its sorption properties for heavy metal ions. The main purpose of the modification was to achieve the oxidation of flax cellulose with sodium metaperiodate to form dialdehyde cellulose. Additionally, the research shows the subsequent interaction of dialdehyde cellulose with 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid and its transformation into a derivative capable of forming chelate complexes with heavy metal ions. Additionally, this article presents the results of equilibrium and kinetics studies of the sorption of Cu(II), Cd(II), and Fe(II) ions from aqueous solutions by primary and modified cellulose sorbents. SEM spectra indicate changes in the surface structure of the modified sorbents compared to the original one. IR spectra show the appearance of amino- and sulfogroups in short flax fibers in the process of their modification. The research revealed the efficiency of the method and the possibility of its use for the purification of aqueous solutions from heavy metal ions in industrial processes.

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“…For the elimination of heavy metals from waste water the low cost agricultural rest by-products such as rice husk [11], nutshell [12], coconut husk [13] have been investigated by various research groups. To increase the adsorptive capacity of sorbents during processing raw plant material the various methods such as mechanical, physical, chemical methods, including thermal treatment of raw materials are used [14][15][16][17][18]. The effect of heat treatment of the rice husk on the adsorbent capacity of sorbents towards to Fe(III), Cu(II), Cd(II), Pb(II) ions in solution have been studied [19].…”

Section: Introductionmentioning

confidence: 99%

Modified Raw Materials: Synthesis, Characterization and Application for Cd<sup>2+</sup> Ions Removal

Seilkhanova¹,

Imangaliyeva²,

Akbayeva³

et al. 2017

Studia UBB Chemia

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ABSTRACT. The adsorption behavior of some lowcost adsorbents such as bentonite, meal thistle and carbonized walnut husk with respect to Cd 2+ ions in aqueous solutions has been studied. The several process parameters (contact time, initial metal concentration, sorption capacity, extraction degree, rate constants, sorption rates and sorption energy) were found. For the Cd 2+ ions adsorption the equilibrium time onto bentonite, meal thistle and carbonized walnut husk were found to be 2 h, 25 and 10 min, respectively. Adsorption parameters were determined using both Langmuir and Freundlich isotherms. Sorption isotherms of cadmium ions onto MBT (modified bentonite) and MTM (modified thistle meal) were the best of all described by the equation of Freundlich sorption (correlation coefficients are closest to unit). In contrast the sorption of Cd 2+ ions onto MCWH (modified carbonized walnut husk) was described by the Langmuir isothermic model where the adsorption occurs on homogeneous surface by monolayer sorption without interaction between sorbed ions. The obtained results demonstrate that bentonite, meal thistle and carbonized walnut husk can remove Cd 2+ ions from aqueous solutions. It means that cheap and available raw materials can be efficient adsorbents and capable to remove cationic heavy metal species from waste water. The ion-exchange mechanism of adsorption of cadmium ions by the MBT, MTM, MCWH was proposed.

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Sorption properties of plasma-modified flax fibers

Cited by 8 publications

References 3 publications

Production of cellulose-containing sorption materials for wastewater treatment from heavy metal ions

Production of cellulose-containing sorption materials for wastewater treatment from heavy metal ions

Heavy Metal Ions(II) Sorption by a Cellulose-Based Sorbent Containing Sulfogroups

Modified Raw Materials: Synthesis, Characterization and Application for Cd<sup>2+</sup> Ions Removal

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