2. ENVIRONMENTAL ChEMISTRy & TEChNOLOGy 2.1. Lectures

Chem. Listy, 102, s265–s1311 (2008) Environmental Chemistry & Technology
Fig. 6. Calibrations for the reported cations
s443
From the 13 quantifiable ions, only eight were found
in the analyzed water samples: na + , K + , nH 4 + , Mg 2+ , Ca 2+ ,
Cl – , nO 3 – , PO4 3– and SO4 2– , within a concentration range of
6.64 ppm (for K + ) to 346.27 ppm (for SO 4 2– ). Calibrations for
these ions are presented in figures 5 and 6.
Table II provides information on the anion concentration
while Table III reveals the cation concentration from the
investigated surface waters.
Table III
The anions’ concentrations in the studied water sources (mean
values ± SD)
Location Cl– [ppm] nO 3 – [ppm] SO4 2– [ppm]
Draw well near
Tăul Popii lake
66.99 ± 3.29 79.97 ± 3.97 343.28 ± 17.14
Spring near
Tăul Popii lake
27.53 ± 1.39 – 141.17 ± 7.03
Cătina lake 66.54 ± 3.37 25.63 ± 1.21 346.27 ± 17.31
Geaca lake 57.21 ± 2.81 23.69 ± 1.15 264.03 ± 13.29
Ţaga lake 94.11 ± 4.70 23.02 ± 0.93 279.85 ± 13.85
ştiucii lake 60.28 ± 2.96 – 63.69 ± 2.91
Fizeş river 191.53 ± 9.46 – 254.32 ± 12.62
The higher nitrate concentration in the draw well is
due to the fact that a relatively high nitrate concentration is
a general characteristic for underground water resources in
Fizes catchement; this catchement has substantial diffusion
pollution sources originated by manure and animal breeding.
The chloride concentration ranges from 27.53 ppm (in
a spring located near Tăul Popii lake) to 191.53 ppm (Fizes
river), possible to explain due to the geological substrate of
the area, salt being present as outcrops in the lower part of the
catchement. The sulfate concentration was high in all samples,
ranging from 63.69 ppm (in Stiucii lake) to 347.26 ppm
(in Cătina lake).
All the concentration values are consistent with the
general geological composition of the area. Slightly different
values measured in different points of water surface sampling
points in the same collector (Fizes valley) stream could be
explained as consequence of normal variation due to different
water contact duration among the watershed, during precipitation
events.
Conclusions
This research revealed the state of the water quality
and also clarified some aspects related to the process of self
purifications of the water system in the considered area. The
upstream ponds retain most of the sediment and pollutants
through mechanisms of sedimentation and self-purification,
most of the pollution sources being also located in the upper
part of the catchement.
Data gathered will serve as beneficial experience for
future rehabilitation measures. Using the proposed IC configuration,
the laboratory productivity increases much, as there
is no longer necessary to prepare two sample sets – one for