Određivanje ukupnog dušika u površinskim vodama

master's thesis

• Title (english): Determination of total nitrogen in surface wathers
• Author: Tena Habijanec
• Mentor: Nikola Sakač (mentor)
• Committee member: Igor Petrović (predsjednik povjerenstva)
• Committee member: Nikola Sakač (član povjerenstva)
• Committee member: Ivan Kovač (član povjerenstva)
• Committee member: Anita Ptiček Siročić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Geotechnical Engineering; Varaždin
• Defense date and country: 2020-09-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

Ukupni dušik u vodi je zbroj svih dušikovih spojeva u vodi, odnosno zbroj organskog i anorganskog dušika prisutnog u vodi. Uključuje organske spojeve dok u anorganski dušik spadaju nitrati, nitriti i amonijak. U ovom diplomskom radu određivana je koncentracija ukupnog dušika u površinskim vodama na 9 lokacija na području Varaždinske županije i 9 lokacija na području Krapinsko-zagorske županije, jednom mjesečno, za razdoblje od travnja 2019. do ožujka 2020. godine. Za analizu površinskih voda za ukupni dušik korišten je kivetni test (Hach Lange metoda – LCK 138). Dobiveni rezultati koncentracija ukupnog dušika u površinskim vodama obrađeni su u skladu s Uredbom o standardu kakvoće vode. Na području obje županije ni jedna lokacija uzorkovanja nije kategorije ekološkog stanja „vrlo dobar“ jer na svim lokacijama koncentracija ukupnog dušika prelazi 1,1 mgN/l barem jedan mjesec. Na području Varaždinske županije samo su dvije lokacije kategorije ekološkog stanja „dobar“, odnosno koncentracija ukupnog dušika ne prolazi 2 mgN/l (lokacija 1 i lokacija 5). Ostalih 7 lokacija prelazi graničnu vrijednost od 2 mgN/l. Na području Krapinsko-zagorske županije u kategoriju ekološkog stanja „dobar“ spada lokacija 3. Ostalih 8 lokacija prelazi graničnu vrijednost od 2 mgN/l. Najveća koncentracija ukupnog dušika na području Krapinsko-zagorske županije iznosila je 7,67 mgN/l na lokaciji 2 u listopadu 2019. godine. Najveća koncentracija ukupnog dušika na području Varaždinske županije iznosila je 6,74 mgN/l na lokaciji 6 u listopadu 2019. godine. Rezultati analize pokazali su da je voda na samo 3 lokacije kategorije ekološkog stanja „dobar“, dok je na ostalih 15 lokacija dopuštena granična vrijednost bila prekoračena.

Abstract (english)

Total amount of nitrogen in water is the sum of all nitrogen compounds in water; it is the sum of organic and inorganic nitrogen present in water. It includes organic compounds while inorganic nitrogen includes nitrates, nitrites and ammonia. In this paper, the concentration of total nitrogen in surface water was determined at 9 locations in Varaždin County and 9 locations in Krapina-Zagorje County once per month for the period from April 2019 to March 2020. A cuvette test (Hach Lange method - LCK 138) was used to analyse surface water for total nitrogen content. The obtained results of total nitrogen concentrations in the surface water were elaborated in accordance with the Regulation on Water Quality Standard. In both counties, none of the sampling locations had an ecological status "very good" since in all locations the concentration of total nitrogen exceeded 1.1 mgN/l for at least one month. In the area of Varaždin County, only two locations had an ecological status "good" since the concentration of total nitrogen did not exceed 2 mgN/l (location 1 and location 5). In other 7 locations the limit value of 2 mgN/l was exceeded. In the area of the Krapina-Zagorje County, location 3 was categorized as having an ecological status "good". In other 8 locations the limit value of 2 mgN/l was exceed. The highest concentration of total nitrogen in Krapina-Zagorje County was 7.67 mgN/l at location 2 in October 2019. The highest concentration of total nitrogen in the area of Varaždin County was 6.74 mgN/l at location 6 in October 2019. Overall, the results of the analysis showed that the surface water in only 3 locations could be categorised as good", while in the other 15 locations the permitted limit values were exceeded.

• Keywords: površinske vode; ukupni dušik; kivetni test
• Keywords (english): surface waters; total nitrogen; cuvette test
• Language: croatian
• URN:NBN: urn:nbn:hr:130:354223
• Study programme: Title: Geoenvironmental Engineering; specializations in: Geoenvironmental Engineering, Environmental Management, Water Management; Course: Geoenvironmental Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/ inženjerka inženjerstva okoliša (magistar/magistra inženjer/ inženjerka inženjerstva okoliša)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-10-12 07:38:23