2. ENVIRONMENTAL ChEMISTRy & TEChNOLOGy 2.1. Lectures

Chem. Listy, 102, s265–s1311 (2008) Environmental Chemistry & Technology
P15 ATMOSPhERICAL DEPOSITION AND
IMMISSION SITuATION IN THE NIŽNÁ
SLANÁ AREA
ERIKA FEDOROVá, JOZEF HAnČUľáK, OľGA
ŠESTInOVá, Ján BREHUV and TOMISLAV ŠPALDOn
Institute of Geotechnice of the Slovak Academy of Sciences,
Watsonova 45, 043 53 Košice,
fedorova@saske.sk
Introduction
Owing the positive results of geological survey, the
nižná Slaná region has become during last 35 years the most
important basis of Fe-ore. Potential of industrial siderite is
63 mil. t 1,2 .
The biggest of the polution sources is the chimney which
is 120 m high. The dust fallout was monitored by means of
17 sampling points located maximally up to 8 km from main
source of pollution. The pollutants have municipal as well as
industrial origin 5 . The range of plant emission by chemical
data processing and by their comparision with dust deposition
was investigated. In the present time the communal and
the natural sphere causes the air pollution 3,7 .
Experimental
Samples of the dust deposition were taken in monthly
intervals from seventeen sampling places in the intervals of
30 ± 3 days. To take the samples of the dust deposition plastic
sedimentation containers having a cylinder shape with the
internal diameter of 12.5 cm were used and located on two
holders in the height of 2.5 to 3 m 1,4,7 . The containers were
filled with 250 ml of distilled water with additives of substances
preventing creation of algae in the summer period and
antifreeze additives in the winter period. After sampling the
content of the containers was quantitatively transferred to the
evaporating dishes and evaporated. To remove the organic
mass the evaporation residue was annealed at the temperature
of 450 ºC. The temperature was selected not to cause degradation
of present carbonates and so possible distortion of
gravimetry of the dust deposition. The gravimetry was made
separately for each of the containers 6 . The result for each
month and individual sampling places is calculated in units of
g m –2 (30 days) –1 and it is the average of alues from two exposed
containers. The inorganic part from twelve months set by
annealing was cumulated into one sample and after mineralization
analysed for individual monitored elements using the
AAS method and the SpectrAA – 30 VARIAn unit 4,7 .
Results
Localisation of the sampling places of deposition is
shown in Table I.
The results are the values acquired from deposition
samples after drying and annealing. The specific values of
dust fallout are shown on Table II. As it is evident from these
results, the highest values of the dust fallout were recorded
in summer months and the vegetation period and that is
s363
Table I
Localisation and the samples quantity in the year of 2007
number of
The samples
Locality
locality quantity
1 Vlachovo – swimming pool 12
2 Gočovo – playground 11
3 n. Slaná – colony 12
4 Above plant 12
5 Before plant 12
6 n. Slaná – agrarian cooperative 12
7 n. Slaná – playground 12
8 Direction to Kobeliarovo 12
9 Crossroad – Štítnik 11
10 Henckovce – before village 12
11 Henckovce – upper part 12
12 Henckovce – cemetary 12
13 Henckovce – near railway 12
14 Henckovce – lower part 12
15 Between H. a G. Polomou 11
16 Gemerská Poloma 12
17 Betliar 12
reflected in the percentage representation of the annealed
organic part.
According to Table II and Fig. 1. the highest average
values were recorded on sampling places no. 7 and 5 in 2007
being directly influenced by the dust deposition from the spot
source of the plant and localized in the central part of the
valley (4.40 an 2.77 g m –2 (30 days) –1 accordingly). Just to
compare, the average value from the sampling place no. 8
that is localized relatively close to the plant, but on the west
side of the valley (west side of nižná Slaná in the direction
to Kobeliarovo) achieves only 0.57 g m –2 (30 days) –1 . Some
of the increased values mainly from the summer period need
to be ascribed also to the extremely dry weather in 2007 and
blowing out of the inorganic particles from the uncovered
horizonts of the farmland.
Fig. 1. Specific values of dust deposition in g m –2 (30 days) –1