Določanje fosfata v vodi

Povzetek

Ključne besede

Podatki

Jezik:	Slovenski jezik
Leto izida:	2013
Izvor:	Ljubljana
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UL FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Založnik:	[A. Remic]
UDK:	543.3(043.2)
COBISS:	9705289
Št. ogledov:	1528
Št. prenosov:	309
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	Phosphate determination in water
Sekundarni povzetek:	Water is a very important compound, as the entire life depends upon it. Direct discharges of municipal water, industrial effluents into rivers and lakes, as well as excessive use of fertilizers, pesticides are extremely harmful to the water. If water is contaminated for a long period of time this may lead to eutrophication of the water system in this area. Polluted water may also leach in the groundwater and contaminate drinking water, which can be prevented by the use of wastewater treatment plant. In the thesis I determined the amount of phosphate in selected water samples. Samples were taken at various sites in Gorenjska. The presence of phosphate was determined using test kit for the determination of phosphate and spectrophotometric method. I have verified the accuracy of the spectrophotometric method by determining lower and upper limit of quantification, reproducibility of the results and trueness of the results. I determined the concentration of phosphate using the calibration curve method and the method of standard additions. The results were compared with the limit values for phosphate. In the context of the methodological work I prepared a fieldwork, where the pupils can learn about the experimental work outside the laboratory. Pupils are introduced to the test kit for the determination of various ions dissolved in the water and water hardness and pH determination. Fieldwork is intended for pupils in 8th and 9th class who are attending elective Environmental Chemistry.
Sekundarne ključne besede:	chemistry;field research;kemija;terensko raziskovanje;
Vrsta datoteke:	application/pdf
Vrsta dela (COBISS):	Diplomsko delo
Komentar na gradivo:	Univ. Ljubljana, Pedagoška fak., Biotehniška fak., Fak. za kemijo in kemijsko tehnologijo, Naravoslovnotehniška fak., Kemija in biologija
Strani:	71 str.
Vrsta dela (ePrints):	thesis
Naslov (ePrints):	Phosphate determination in water
Ključne besede (ePrints):	fosfatni ion
Ključne besede (ePrints, sekundarni jezik):	phosphate ion
Povzetek (ePrints):	Voda je zelo pomembna spojina, saj je od nje odvisno celotno življenje. Neposredni izpusti komunalnih voda, industrijskih odplak v reke in jezera ter pretirana uporaba umetnih gnojil, pesticidov pa izredno škodujejo vodi. V določenih primerih, ko je na nekem področju onesnažena voda dlje časa, prihaja do evtrofikacije vodnega sistema. Onesnažena voda lahko pride tudi v podtalnico in onesnaži pitno vodo. Onesnaženost pa lahko preprečimo z uporabo čistilne naprave. V okviru diplomskega dela sem določala količino fosfata v izbranih vzorcih vode. Vzorci so bili odvzeti v različnih krajih na Gorenjskem. Prisotnost fosfata sem določala s hitrimi testi za določanje fosfata in spektrofotometrično metodo. Pravilnost spektrofotometrične metode sem preverila s tem, da sem določila spodnjo in zgornjo mejo določanja, ponovljivost rezultatov in točnost rezultatov. Koncentracijo sem določala po metodi umeritvene premice in po metodi standardnih dodatkov. Rezultate sem primerjala z določenimi mejnimi vrednostmi za fosfat. V okviru metodološkega dela sem pripravila terensko delo, kjer se učenci spoznajo z eksperimentalnim delom izven laboratorija. Učenci se seznanijo s hitrimi testi za določanje različnih ionov, raztopljenih v vodi ter določitvijo trdote vode in pH. Terensko delo je namenjeno učencem 8. in 9. razreda, ki obiskujejo izbirni predmet Kemija okolja.
Povzetek (ePrints, sekundarni jezik):	Water is a very important compound, as the entire life depends upon it. Direct discharges of municipal water, industrial effluents into rivers and lakes, as well as excessive use of fertilizers, pesticides are extremely harmful to the water. If water is contaminated for a long period of time this may lead to eutrophication of the water system in this area. Polluted water may also leach in the groundwater and contaminate drinking water, which can be prevented by the use of wastewater treatment plant. In the thesis I determined the amount of phosphate in selected water samples. Samples were taken at various sites in Gorenjska. The presence of phosphate was determined using test kit for the determination of phosphate and spectrophotometric method. I have verified the accuracy of the spectrophotometric method by determining lower and upper limit of quantification, reproducibility of the results and trueness of the results. I determined the concentration of phosphate using the calibration curve method and the method of standard additions. The results were compared with the limit values for phosphate. In the context of the methodological work I prepared a fieldwork, where the pupils can learn about the experimental work outside the laboratory. Pupils are introduced to the test kit for the determination of various ions dissolved in the water and water hardness and pH determination. Fieldwork is intended for pupils in 8th and 9th class who are attending elective Environmental Chemistry.
Ključne besede (ePrints, sekundarni jezik):	phosphate ion
ID:	8311586