Geokemijske karakteristike sedimenta rijeke Save određene BCR metodom.

master's thesis

• Title (english): Geochemical characteristics of the Sava river sediment determined by the BCR methodology.
• Author: Renato Kocijan
• Mentor: Hana Fajković (mentor)
• Committee member: Hana Fajković (predsjednik povjerenstva)
• Committee member: Kristina Pikelj (član povjerenstva)
• Committee member: Dražen Kurtanjek (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2020-02-17, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

Sustavi za pročišćavanje otpadnih voda predstavljaju nužnost u gradskim sredinama te se postavlja pitanje njihovog utjecaja na okoliš. Cilj rada je bio utvrditi postoje li geokemijske promjene u sedimentu uzvodno i nizvodno od lokacije ispusta pročišćenih otpadnih voda grada Zagreba. Analiza se provela na uzorcima s 4 lokacije te se koristio BCR protokol za sekvencijsku ekstrakcijsku kemijsku analizu uzorkovanih sedimenata. Iz rezultata se može zaključiti da su kod većine elemenata od interesa (Cu, Zn, Cr, Ni i Pb) povišene koncentracije kod ispusta i nizvodno od ispusta kanala pročišćivača otpadnih voda. Koncentracije elemenata od interesa u prvom koraku BCR protokola (topivi, izmjenjivi kationi te oni vezani uz karbonate) ne prelaze predložene granične vrijednosti teških metala u sedimentu i samim time ne predstavljaju potencijalnu opasnost, dok promatrajući ukupne koncentracije sva tri koraka analize mogu se izdvojiti elementi Cu, Pb, As. Koncentracije tih elemqanat, kao suma sva tri koraka BCR analize prelaze granice predloženih graničnih vrijednosti teških metala u sedimentu. Mineralni sastav sedimenta podudara se s litologijom istraživanog područja i litološkim karakteristikama područja uzvodno od istraživanog područja.

Abstract (english)

Wastewater treatment systems are a necessity in urban areas and the question is how they impact on natural environmental. The aim of the study was to determine are there geochemical changes present in the sediment upstream and downstream of the discharge site of the treated wastewater of the City of Zagreb. The analysis was performed on samples from 4 sites and the BCR protocol was used for sequential extraction chemical analysis of the sampled sediments. From the results, it can be concluded that most elements (Cu, Zn, Cr, Ni and Pb) have elevated concentrations at the discharge and downstream of the discharge of the sewage treatment plant. Concentrations of the elements of interest in the first step of the BCR protocol (soluble, exchangeable cations, and those related to carbonates) do not exceed the proposed limit values of heavy metals in the sediment and thus do not represent a potential hazard, while observing the total concentrations of all three steps of analysis, Cu, Pb and As elements concentrations (the sum of all three steps of BCR analysis), exceed the limits of the proposed limit values of heavy metals in sediment. The mineral composition of the sediment concur with the lithology of the study area and the lithological characteristics of the area upstream of the study area.

• Keywords: Sava; BCR protokol; geokemijske karakteristike; mineraloške karakteristike
• Keywords (english): Sava; BCR protocol; geochemical characteristics; mineral characteristics
• Language: croatian
• URN:NBN: urn:nbn:hr:217:685316
• Study programme: Title: Graduate university study of Environmental Geology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra geologije (magistar/magistra geologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2022-02-17
• Created on: 2020-07-10 10:27:33