diplomsko delo
Povzetek
V okviru diplomskega dela smo določali vsebnost težkih kovin v površinski vodi potoka
Drtijščice z namenom ocenitve njihovih vplivov na zdravje ljudi. Določali smo arzen
(As), kadmij (Cd), kobalt (Co), krom (Cr), baker (Cu), molibden (Mo), nikelj (Ni), svinec
(Pb), selen (Se) in cink (Zn). Terensko delo - vzorčenje smo opravili februarja 2020,
takrat smo odvzeli šest vzorcev na šestih različnih odvzemnih mestih. Vzorce smo
prefiltrirali in redčili z 1 % dušikovo kislino. Za določevanje kovin v vodi smo uporabili
akreditirano analitsko tehniko induktivno sklopljeno plazemsko atomsko emisijsko
spektroskopijo (ICP-OES), ki nam je, v enem vzorcu, omogočala določevanje več
kovin hkrati. Za pripravo standardnih raztopin smo uporabili multi-standardno raztopino
Merck (VI) KGaA. Dobljene koncentracije smo primerjali z mejnimi in priporočenimi
vrednostmi iz domače in tuje zakonodaje ter drugimi verodostojnimi študijami.
Rezultati so pokazali povišane koncentracije Se in Co, saj je vrednost teh dveh kovin
v vseh šestih vzorcih presegala mejne vrednosti iz slovenske zakonodaje. Prav tako
so bile na večih odvzemnih mestih presežene koncentracije Pb, As, Cd in Cu.
Izmerjene vrednosti Zn in Cr v nobenem vzorcu niso presegale mejnih vrednosti.
Vrednosti Mn, Mo in Ni so bile, v glavnem, pod mejo detekcije, kar pomeni, da je bila
koncentracija teh kovin v vzorcih premajhna, da bi jo aparatura lahko zaznala.
Povišane koncentracije skoraj polovice od preiskovanih težkih kovin v površinski vodi,
nakazujejo na slabo ekološko stanje preiskovanega vodnega telesa, kar lahko vpliva
na zdravje okoliških prebivalcev in vodne organizme.
Ključne besede
težke kovine;površinske vode;vplivi na okolje;vplivi na zdravje;ICP-OES;zakonodaja;diplomska dela;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2020 |
Tipologija: |
2.11 - Diplomsko delo |
Organizacija: |
UL FKKT - Fakulteta za kemijo in kemijsko tehnologijo |
Založnik: |
[H. Hajrlahović] |
UDK: |
546.3:504.5(043.2) |
COBISS: |
30224387
|
Št. ogledov: |
1014 |
Št. prenosov: |
254 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Determination of selected metals in surface water by ICP-OES and assessment of their effects on human health |
Sekundarni povzetek: |
As part of my bachelor's degree, we determined the content of heavy metals in the
surface water of Drtijščica stream in order to assess their impact on human health. In
the water we determined arsenic (As), cadmium (Cd), cobalt (Co), chromium (Cr),
baking (Cu), molybdenum (Mo), nickel (Ni), lead (Pb), selenium (Se) and zinc (Zn).
The submitted work, i.e. sampling, was carried out in the February 2020 when six
samples were taken at six different sampling points. The samples were then filtered
and diluted with 1% nitric acid. For the determination of metals in water, we used the
accredited method of inductively coupled plasma - optical emission spectrometry (ICP-
OES), which enabled us to determine several metals in one sample simultaneously. A
multi-standard solution from Merck (VI) KGaA was used to prepare the standard
solutions. The results of our study were then compared with the maximum permitted
and recommended concentrations from domestic and foreign legislation and other
credible studies.
The results showed an increased concentration of Se and Co, as the value of the two
metals in all six samples exceeded the limits set by Slovenian legislation. The
concentrations of Pb, As, Cd and Cu also exceeded the limit values at most of the
sampling points. The measured values of Zn and Cr did not exceed the limit values in
any sample. The values of Mn, Mo and Ni were mainly below the detection limit, which
means that the concentration of these metals was too low for detection with the ICP-
OES device. Elevated concentrations of almost half of the investigated heavy metals,
indicate a poor ecological status, which can definitely have an effect on human health
and aquatic organisms. |
Sekundarne ključne besede: |
heavy metals;surface water;health effects; |
Vrsta dela (COBISS): |
Diplomsko delo/naloga |
Študijski program: |
1000370 |
Konec prepovedi (OpenAIRE): |
1970-01-01 |
Komentar na gradivo: |
Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, UNI Tehniška varnost |
Strani: |
XIII, 63 f. |
ID: |
12031330 |