Određivanje nitrata u vodi za ljudsku potrošnju

master's thesis

• Title (english): The determination of nitrates in water for human consumption
• Author: Liza Gajski
• Mentor: Anita Ptiček Siročić (mentor)
• Committee member: Sanja Kovač (predsjednik povjerenstva)
• Committee member: Anita Ptiček Siročić (član povjerenstva)
• Committee member: Nikola Sakač (član povjerenstva)
• Granter: University of Zagreb; Faculty of Geotechnical Engineering; Varaždin
• Defense date and country: 2023-07-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

Nitrati su bezbojne tvari koje se u okolišu pojavljuju kao rezultat ljudskih aktivnosti.
Spajanjem dušika i kisika nastaju nitratni spojevi bez mirisa. Mogu se pojaviti u
površinskim i u podzemnim vodama u niskim razinama koje ne uzrokuju zdravstvene
probleme dok visoke koncentracije nitrata mogu biti posljedica otjecanja s odlagališta
otpada, otjecanja iz poljoprivrede, nepravilne izgradnja bunara ili kontaminacije ljudskim
ili životinjskim otpadom. Kada tlo sadrži više nitrata nego što je biljkama potrebno, višak
se ispire kišnicom kroz tlo i odlazi u podzemne vode. Ako podzemna voda opskrbljuje
izvore koji izviru u potoke ili jezera, nitrati mogu uzrokovati prekomjeran rast korova,
cvjetanje algi te biti toksični za cjelokupni biljni i životinjski svijet. Podzemna voda koja
se koristi kao izvor pitke vode može predstavljati veliki zdravstveni rizik ako se u
njezinom sastavu nalaze visoke koncentracije nitrata. U ovom radu određivana je
koncentracija nitrata u vodama za ljudsku potrošnju na 6 lokacija na području
Varaždinske županije u periodu od veljače 2020. do veljače 2023. godine u prosjeku 3
puta godišnje. Uzorci površinske vode analizirani su pomoću uređaja Dionex Integrion
HPIC. Rezultati su pokazali da su svi analizirani uzorci površinske vode na području
županije u skladu s Uredbom o standardu kakvoće vode, odnosno da se vrijednosti nitrata
nalaze unutar propisanih graničnih vrijednosti. Najveća koncentracija nitrata u
Varaždinskoj županiji zabilježena je u rujnu 2021. godine i iznosila je 30,9 mg/l.

Abstract (english)

Nitrates are colourless chemicals that appear in the environment as a result of human
activities. Nitrates are odourless compounds which are formed when nitrogen reacts with
oxygen. They can occur in surface and groundwater at low levels that do not cause health
problems, while high concentrations of nitrates can result from landfill runoff,
agricultural runoff, improper well construction, or contamination by human or animal
waste. When a soil contains more nitrates that plants need, the excess is washed by
rainwater through a soil and they end up in groundwater. If groundwater supplies springs
that flow into streams or lakes, nitrates can cause excessive weed growth, algal bloom
and they can be toxic to flora and fauna. Groundwater which is used as a source of
drinking water can pose a major health risk if it contains high concentrations of nitrates.
In this work, the concentration of nitrates in water for human consumption was
determined on average three times a year at six locations in the Varaždin County in the
period from February 2020 to February 2023. The analyis was carried out by using
Dionex Integrion HPIC. The analysis showed that the analysed water samples are in
accordance with the Regulation on Water Quality Standards, i.e. the nitrate values are
within the prescribed limit values. The highest nitrate concentration in Varaždin was
recorded in September 2021 and it was 30.9 mg/l.

• Keywords: nitrati; voda za ljudsku potrošnju; utjecaj na ljudsko zdravlje
• Keywords (english): nitrates; water for human consumption; impact on human health
• Language: croatian
• URN:NBN: urn:nbn:hr:130:324846
• Study programme: Title: Geoenvironmental Engineering; specializations in: Geoenvironmental Engineering, Environmental Management, Water Management; Course: Environmental Management; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka inženjerstva okoliša (sveučilišni/a magistar/magistra inženjer/inženjerka inženjerstva okoliša)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-02-13 10:13:51