OPTICAL FIBRE pH SENSOR BASED ON ION ADSORPTION
IN SOL-GEL LAYER
G. Sudolski, J. Rayss
Laboratory of Optical Fibre Technology, Faculty of Chemistry,
Maria Curie-Sklodowska University,
Maria Curie-Sklodowska sq. 3, 20-031 Lublin, Poland
e-mail: sudolski@hermes.umcs.lublin.pl
In this paper an optical pH sensor based on ion adsorption is presented. As optical transducer porous layer of silica, which was prepared by means of sol-gel method, was utilised. There was no pH sensitive indicator incorporated in the sol-gel layer.
It is well known that absorption Continue Reading »
ADSORPTION FEATURES OF POLYFUNCTIONAL OLIGOMERS
ON THE GLASS CARBON
A.S. Zaichenko1, S.A. Voronov1, M.O. Kovbuz2, N.Ye. Mitina1
1National University "Lvivska Polytechnica", Lviv, Ukraine
2Lviv Ivan Franko National University, Lviv, Ukraine
The problem of studying of adsorption of polyfunctional initiating system on the base of organic and inorganic extenders has arisen with receiving of new filled copolymer composition. On this, first of all, the selection of optimal conditions of modification of surface extenders with various types of polyfunctional peroxides is ground Continue Reading »
ADSORPTION OF MANGANESE ON TRANSCARPATHIAN CLINOPTILOLITE
V.O. Vasylechko, G.V. Gryshchouk, Yu.B. Kuz\’ma, Yu.O. Sulym
Lviv Ivan Franko National University, Lviv, Ukraine
In contrast to typical ion-change substances natural zeolites are characterised both by ion-exchange and molecular sieve properties. That gives wide opportunities for elaboration selective methods of concentration, separation and determination of heavy metals and some organic substances. Stability towards aggressive media, regeneration possibilities, low prices and high adsorption capacity of natural zeolites provide their use as adsorbents in solid-ph Continue Reading »
A NEW PRODUCTION TECHNOLOGY OF NITRIC ACID
IN NON-PLATINUM CATALYST AEROSOULE
A.I. Volga, M.A. Glikin, D.A. Kutакоvа, E.M. Prin, L.S. Lahmanchuk
State Research and Design Institute of Chemical Technology "Khimtekhnology",
Vilesov st. 1, 93400 Severodonetsk, Lugansk region, Ukraine
fax: (06452) 25367, e-mail: vera@ixt.lg.ua
The increasing attention has recently been given to mechanoactivation in catalyst production. The influence of mechanical treatment on catalytic system activity is caused both by growth of active center concentration on a catalyst surface, due to str Continue Reading »
Some peculiarities of Cs137 and Sr90 in heterogeneouse system soil-sorbent-plant
V.V. Strelko1, D. Ellwood2, N.M. Openko1, S.V. Mikhalovsky3,
E.A. Diyuk1, D.I. Shvets1
1Institute for Sorption and Endoecology Problems, Ukrainian National Academy of Sciences,
General Naumov st. 13, 03680 Kyiv, Ukraine, e-mail: dshvets@ispe.kiev.ua
2University of Southampton, UK
3Brighton University, UK
After Chernobyl accident the major territories were contaminated with radionuclides of cesium, strontium, plutonium. Taking into account a large scale of contaminated territo Continue Reading »
DETERMINATION OF THE ACTIVATED CARBON STRUCTURAL HETEROGENEITY ON THE BASIS OF STOECKLI
AND DUBININ – STOECKLI EQUATIONS
B.J. Trznadel, P. Kowalczyk
Military Institute of Chemistry and Radiometry, 00-910 Warsaw, Poland
Activated carbons possess micropores, mesopores, and macropores. Macropores play the main role in mass transfer phenomena from gaseous phase to meso- and micropores. The presence of micropores and mesopores affects sorption properties of an adsorbent. The most important characteristic of adsorbent is pore sizes distribution, mainly micropore size distribution (MPSD). S Continue Reading »