Autor: Vasylechko, V.O. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Badania nad przydatnością zakarpackiego klinoptylolitu do adsorbcji chloroformu z roztworów wodnych
On the utility of Transcarpathian Clinoptylolite in the adsorption of chloroform from aqueous solutions
Autorzy:: Vasylechko, V.O.
Lebedynets, L.O.
Gryshchouk, G.V.
Leboda, R.
Skubiszewska-Zięba, J.
Powiązania:: https://bibliotekanauki.pl/articles/237261.pdf
Data publikacji:: 1998
Wydawca:: Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:: klinoptylolit zakarpacki
roztwory wodne
adsorpcja chloroformu
Opis:: The objective of the study was to determine the sorbing capacity of the transcarpathian clinophylolite ( Ukraine ) when applied to chloroform separation from aqueous solutions. Analyses and measurements included the chemical parameters and porosity of the mineral, as well as the effect of processing temperature, grain size distribution and pH ( of the agueous solution ) on the sorbing properties with respect to water and chloroform.The efficiency of chloroform sorption from the agueous solution ranged from 97 to 99%.This is an indication that the clinoptylolite has a great potential for being effectively used as a sorbend in the concentration of chloroform occuring in agueous solutions.The properties of the clinoptylolite make it applicable not only to analytical procedures,but also to water treatment.
Źródło:: Ochrona Środowiska; 1998, 3; 27-30
1230-6169
Pojawia się w:: Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Sorption of Neodymium and Gadolinium on Transcarpathian Clinoptilolite
Autorzy:: Vasylechko, V.
Stechynska, E.
Stashkiv, O.
Gryshchouk, G.
Patsay, I.
Powiązania:: https://bibliotekanauki.pl/articles/1029699.pdf
Data publikacji:: 2018-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 68.43.-h
07.60.Dq
82.75.Vx
Opis:: The sorption properties of Transcarpathian clinoptilolite towards Nd(III) and Gd(III) under dynamic condition have been studied. Nd(III) was sorbed with the best efficiency on the uncalcined clinoptilolite samples from the solutions at pH 6.5. Clinoptilolite samples that were previously calcined at 250°C exhibit the maximal sorption capacity towards Gd(III) from the solutions at pH 9.5. Nd(III) and Gd(III) sorption on clinoptilolite mechanisms are different: Nd(III) is sorbed according to the ion-exchange mechanism, and the sorption of Gd(III) is carried out mainly by means of the adsorption of soluble hydrolyzed forms of Gd(III) on the zeolite surface. The differences in sorption mechanisms of these lanthanides give an opportunity to separate Nd(III) and Gd(III) from the solutions at pH 9.5. The maximal sorption capacity of the clinoptilolite regarding Nd(III) and Gd(III) at the optimal conditions was found to be 1810 and 6500 μg/g. The best desorbent of Nd from the clinoptilolite is 7 M HNO₃ solution. The best desorbent of Gd is 1 M solution of KCl acidified to pH 2.6, which provides a 100% withdrawal of Gd from the zeolite matrix. Transcarpathian clinoptilolite is proposed as a sorbent for the preconcentration of trace amounts of Nd(III) and Gd(III) from aqueous solutions in a solid phase extraction mode.
Źródło:: Acta Physica Polonica A; 2018, 133, 4; 794-797
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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