Vol.3, No 1, 2004 pp. 41 - 52
UDC 66.097.3-039.7 : 549.623.9 + 621.6.031
ELECTROCHEMICAL BEHAVIOUR OF THE CATALYST
WITH KAOLINITE-BENTONITE SUBSTRATE IN WATER
Vesna S. Cvetković1, Jelena M. Purenović2,
Aleksandra R. Zarubica3
1Faculty of Mathematics and Natural
Sciences,
University of Priština-Kosovska Mitrovica, 38000 Priština, Serbia and
Montenegro
2Faculty of Electronic Engineering,
University of Niš, 18000 Niš, Serbia and Montenegro
3Faculty of Mathematics and Natural
Sciences, University of Niš, 18000 Niš,
Serbia and Montenegro
Abstract. Due to the fact that oxidation-reduction potential and
rH2 value of every water are its crucial
features, numereous efforts have been made to use electrochemical means
for water preparation. In this paper, we report the results of electrochemical
influence research of magnesium-aluminium silicate catalyst, in the form
of ceramics made of kaolinite and bentonite clays, on the rH2,
pH and EOR changes of the waters of particular characteristics in the wanted
direction. Particularly, the possibility of changing "active water" characteristics
was investigated. The composite made with microalloyed aluminium exhibits
a very negative stationary potential and its interaction with water results
in water reduction. Addition of some active components to the mixture of
kaolin and bentonite can provide clay mixtures, which after sintering at
high temperatures produce very porous ceramics with microcrystalline and
amorphous regions of stoichiometric and nonstoichiometric new oxides and
some metallized surface (in our case-mainly with magnesium surplus). Nonstoichiometric
oxide mixtures and metallized amorphous ceramics regions show high electrochemical
and chemical activities in contact with water. This leads to redox potential
changes and appearance of Mg2+ ions in
the magnesium aluminium silicate-water system.
Key words: "active water", composite, electrochemical
characteristics, kaolinite- bentonite substrate, microalloyed aluminium,
"passive water"
ELEKTROHEMIJSKO PONAŠANJE KATALIZATORA
SA KAOLINITNO-BENTONITNIM SUPSTRATOM U VODI
Usled činjenice da oksido-redukcioni potencijal i rH2
vrednosti vode jesu njene presudne odlike, brojni napori su učinjeni u
smislu korišćenja elektrohemijskih sredstava za pripremu vode. U ovom radu,
saopštavamo rezultate ispitivanja elektrohemijskog uticaja magnezijum-aluminijum
silikatnog katalizatora, u obliku keramike sačinjene od kaolinitne i bentonitne
gline, na promene rH2, pH i EOR voda sa
posebnim karakteristikama u željenom pravcu. Posebno je ispitivana mogućnost
promene karakteristika "aktivne vode". Kompozit sačinjen sa mikrolegiranim
aluminijumom pokazuje veoma negativni stacionarni potencijal, a njegova
interakcija sa vodom rezultira redukcijom vode. Dodatak pojedinih aktivnih
komponenata smeši kaolina i bentonita, može obezbediti smeše gline, koje
posle sinterovanja na visokim temperaturama, daju veoma porozne keramike
sa mikrokristalnim i amorfnim površinama novih stehiometrijskih i nestehiometrijskih
oksida i izvesnu metaliziranu površinu (u našem slučaju-uglavnom sa viškom
magnezijuma). Nestehiometrijske oksidne smeše i površine metaliziranih
amorfnih keramika pokazuju visoke elektrohemijske i hemijske aktivnosti
u kontaktu sa vodom. Ovo vodi promenama redoks potencijala i pojavi Mg2+
jona u magnezijum-aluminijum silikat-vodenom sistemu.
