The ecology of environment nowadays

DETERMINATION OF DIFFUSION COEFFICIENT

OF ZINC (II) IONS IN POLYMERIC MEMBRANE

BY ABSORPTION SPECTROSCOPY

C. Wardak, J. Chmiel, B. Marczewska,

Department of Analytical Chemistry and Instrumental Analysis,

Faculty of Chemistry, Maria Curie-Sklodowska University,

Maria Curie-Sklodowskasq. 3, 20-031 Lublin, Poland

The diffusion coefficients of different substances in polymers are usually measured by gravimetric techniques. These coefficients can be determined by measurement of substances concentration in membranes which separate solutions. In this case the p Continue Reading »

THE INVESTIGATIONS OF WATER SORPTION

AND POROSITY PROPERTIES OF THE ARGENTINIAN MONTMIRILLONITES USING THE THERMAL ANALYSIS

AND SORPTOMETRY METHODS

P. Staszczuk1, M. Matyjewicz1, J.C. Bazan2, E. Robens3

1Department of Physicochemistry of Solid Surface, Faculty of Chemistry,

Maria Curie-Sklodowska University,

Maria Curie-Sklodowska sq. 3, 20-031 Lublin, Poland

2Dpto. De Quimica e Ing. Quimica, Lab. De Fisicoquimica Inorganica, Universidad Nacional del Su, 8000 Bahia Blanca, Argentina

3Institute for Inorganic and Analytical Chemistry, Johannes Gutenberg University Continue Reading »

THE ADSORPTION OF THE ANIONIC SURFACTANTS BY HYDROXIDE OF IRON AND ALUMINIUM

Е.А Streltsova, Е.А. Hromysheva, А.F. Тymchuk

Odessa I.I. Mechnicov National University,

Pastera st. 27, 65026 Odessa, Ukraine

The study of the adsorption of the surfactants on borders of a liquid – solid body and liquid – gas phases is urgent both for the further development of the theory of adsorption and for solving of a lot of practical tasks. Despite a large number of scientific works the quantitative information about adsorption surfactants by solid and gas adsorbents are inconsistent. The information about the th Continue Reading »

THE SORPTION PROPERTIES AND ENERGETIC HETEROGENEITY CHARACTERIZATION OF HgBa2Ca2Cu3O8+δ SAMPLE BY MEANS OF THE THERMOGRAVIMETRY

AND SORPTOMETRY TECHNIQUES

P. Staszczuk 1, D. Sternik 1, V.V. Kutarov 2, G.W. Chadzynski 3

1Department of Physicochemistry of Solid Surface, Chemistry Faculty

Maria Curie-Sklodowska University,

Maria Curie-Sklodowska sq. 3, 20-031 Lublin, Poland

2 Physical Research Institute, Odessa I.I. Mechnikov National University,

Pastera st. 27, 65026 Odessa, Ukraine

3 Telecommunications Research Institute, Wroclaw Devision,

Grabiszynska st. Continue Reading »

THE STUDIES OF THE VICINAL WATER PROPERTIES BY MEANS OF THE THERMAL ANALYSIS TECHNIQUES

P. Staszczuk

Department of Physicochemistry of Solid Surface, Faculty of Chemistry

Maria Curie-Sklodowska University,

Maria Curie Sklodowska sq. 3, 20-031 Lublin, Poland

At the end of the last century, Röntgen in 1882 suggested the existence of bulky and dense states in liquid water in order to account for the density maximum in liquid water. As early as 1912, Hardy recognized that interfacial liquids might be modified by proximity to solid surfaces. The differences in water properties were also observed Continue Reading »

EFFECT pH ON RHEOLOGICAL AND ELECTRIC PROPERTIES

OF AEROSIL A‑175 DISPERSIONS, MODIFIED BY IONIC SURFACTANTS

A.V. Synyts\’ka, V.P. Zakordons\’kyj, M.M. Soltys

Lviv Ivan Franko National University, Lviv, Ukraine

Effect pH medium on structure-mechanical and electro surface properties of the aerosil A‑175 dispersions, modified by cationic benzetonium chloride (BTC) and anionic sodium dodecylbenzenesulfonate (SDbS) was studied by the rotational viscosimetry and macro electrophoresis methods. Surfactants concentration was stated 2´10-3 mol/l, pH medium changed from 2 until 12.

First Continue Reading »