Procjena toksičnosti i utjecaja otpadnih voda grada Knina na kakvoću vode rijeke Krke

master's thesis

• Title (english): Toxicity assessment and impact of wastewaters of the town of Knin on the water quality of the Krka River
• Author: Amalia Brkić
• Mentor: Želimira Cvetković (mentor)
• Mentor: Mirela Sertić Perić (komentor)
• Committee member: Mirela Sertić Perić (predsjednik povjerenstva)
• Committee member: Jasna Lajtner (član povjerenstva)
• Committee member: Blanka Cvetko Tešović (član povjerenstva)
• Committee member: Ivan Čanjevac (član povjerenstva)
• Committee member: Luka Valožić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2022-09-20, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Od početka 20. stoljeća, rijeka Krka se iskorištava za vodoopskrbu, proizvodnju električne
energije, industriju i poljoprivredu. Svega 2 km uzvodno od Nacionalnog parka Krka, u rijeku Krku
se ispuštaju industrijske i komunalne otpadne vode bez prethodnog adekvatnog pročišćavanja. U
svrhu procjene utjecaja otpadnih voda na rijeku Krku, uzorkovano je pet lokaliteta gornjeg toka
rijeke. Tijekom tri sezone, mjereni su fizikalno-kemijski čimbenici vode te se na uzorcima vode
određivala potencijalna toksičnost voda mjerenjem rasta algi vrste Pseudokirchneriella subcapitata
u kontroliranim uvjetima. Analize su pokazale da je najbolja kvaliteta vode na izvoru rijeke Krke i
u pritoci Butišnici. Lošije ekološko stanje s obzirom na pojedine fizikalno-kemijske čimbenike
vode je uočeno na lokalitetima uz grad Knin i tvornicu vijaka. Također, u uzorcima vode s ta dva
lokaliteta, uočena je i najveća inhibicija rasta algi vrste P. subcapitata. Takvi rezultati potvrđuju
alge vrste P. subcapitata kao osjetljive bioindikatore i ukazuju na onečišćenje vode na pojedinim
lokalitetima na rijeci Krki. Kako bi se u budućnosti izbjegle ozbiljne posljedice za ekosustav,
potrebno je kontinuirano provoditi monitoring područja.

Abstract (english)

Since the beginning of the 20th century, the Krka River has been used for water supply,
electricity production, industry, and agriculture. Just 2 km upstream from the Krka National Park,
industrial and municipal wastewater is discharged into the Krka River without prior adequate
treatment. To estimate influence of the wastewater on the Krka River, water sampling at five sites
in the upstream flow of the Krka River was performed. During three seasons, the physico-chemical
parameters of the water were measured, and the potential toxicity of the water was determined on
the water samples by measuring the growth of algae (Pseudokirchneriella subcapitata) under
controlled conditions. Analyses have shown that the best water quality is at the Krka River source
and in its tributary Butišnica. A poorer ecological status for certain physico-chemical water quality
parameters was observed at the sites near the city of Knin and the screw factory. Also, water
samples from those two localities, showed the greatest inhibition of algae (P. subcapitata) growth.
Results confirmed algae (P. subcapitata) as sensitive bioindicators and indicated water pollution
at some locations along the Krka River. To avoid serious consequences for the ecosystem in the
future, it is necessary to continuously monitor the area.

• Keywords: onečišćenje; ekološko stanje; fizikalno-kemijski čimbenici; alga
• Keywords (english): pollution; ecological status; physico-chemical parameters; algae
• Language: croatian
• URN:NBN: urn:nbn:hr:217:654694
• Study programme: Title: Enviromental Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra struke znanosti o okolišu (magistar/magistra struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2024-09-24
• Created on: 2022-10-21 11:15:49