Title Policiklički aromatski spojevi u sedimentu srednjeg i južnog Jadrana Title (english) Polycyclic aromatic compounds in the sediment of the middle and southern Adriatic Sea Author Jelena Mandić Mentor Maja Pavela-Vrančić (mentor)Committee member Ivana Ujević (predsjednik povjerenstva)Committee member Stjepan Orhanović (član povjerenstva)Committee member Grozdan Kušpilić (član povjerenstva)Granter University of Split Defense date and country 2016-12-02, Croatia Scientific / art field, NATURAL SCIENCES Universal decimal classificationUDC ) 57 - Biological sciences. Physical anthropology. Biodiversity Abstract Maseni udjeli policikliĉkih aromatskih ugljikovodika (PAH-ova) određeni su u 50 uzoraka površinskog sedimenta sakupljenog s 29 lokacija u podruĉju Jadrana. Vrijednosti masenih udjela bile su u rasponu od 14,98 do 23970,92 µg kg-1. Najviše vrijednosti masenih udjela PAH-ova izmjerene su u sedimentu Šibenskog zaljeva, a najniţe vrijednosti izmjerene su u sedimentima otvorenog mora. Nesupstituirani PAH-ovi prevladavali su u sedimentima Šibenskog zaljeva i priobalnog podruĉja, a metil-supstituirani PAH-ovi u sedimentima otvorenog mora i Kaštelanskog zaljeva. Istraţivanjem masenih udjela PAH-ova u sedimentu u podruĉjima transekta te Šibenskog i Kaštelanskog zaljeva u razliĉitim vremenskim razdobljima nisu uoĉene sezonske promjene masenih udjela PAH-ova u sedimentu. Istraţivanjem porijekla oneĉišćenja utvrĊeno je pirogeno porijeklo PAH-ova u sedimentu na većini postaja u podruĉju priobalja i Šibenskog zaljeva, dok je u podruĉju otvorenog mora utvrĊeno petrogeno porijeklo. U Kaštelanskom zaljevu utvrĊen je podjednak doprinos pirogenih i petrogenih izvora ukupnom masenom udjelu PAH-ova u sedimentu. Od tri primijenjene metode za istraţivanje porijekla PAH-ova, Positive Matrix Factorisation (PMF) analiza pruţa najdetaljnije informacije o porijeklu oneĉišćenja. Potencijalna toksiĉnost sedimenta utvrĊena je na svim postajama u Šibenskom zaljevu, na jednoj postaji u Kaštelanskom zaljevu te na dvjema postajama u priobalju. Visok stupanj oneĉišćenja PAH-ovima utvrĊen je u podruĉju industrijske luke Splita, u priobalnom podruĉju Zadra te u podruĉju Braĉko- splitskog kanala, dok je na preostalim postajama u Kaštelanskom zaljevu i u podruĉju priobalja utvrĊen umjeren stupanj oneĉišćenja. Nizak stupanj oneĉišćenja odreĊen je na postajama otvorenog mora, dok je na svim postajama u Šibenskom zaljevu utvrĊen vrlo visoki stupanj oneĉišćenja, pa se ĉitavo podruĉje Šibenskog zaljeva moţe nazvati „vrućom toĉkom”. Linearnom regresijskom analizom utvrĊena je statistiĉki znaĉajna korelacija izmeĊu masenih udjela PAH-ova u sedimentu i udjela ukupnog organskog ugljika i organske tvari te slaba ili nikakva povezanost masenog udjela PAH-ova i granulometrijskog sastava.
Abstract (english) Polycyclic aromatic hydrocarbons (PAH) were investigated in 50 sediment samples collected at 29 locations in the Adriatic Sea. Total PAH concentrations ranged from 14,98 to 23970,92 µg kg-1. The highest PAH levels were determined in sediments from the Šibenik Bay and the lowest PAH levels were determined in open sea sediments. Unsubstituted PAHs predominated in sediments from the Šibenik Bay and the coastal area, while methyl-substituted PAHs were dominant in sediments from the open sea area and the Kaštela Bay. Benzofluorantenes were dominant PAH compounds in most of investigated samples. A seasonal trend in PAH concentrations wasn’t observed in any investigated area. The pyrogenic origin of PAHs was determined for each station in the Šibenik Bay and the majority of stations in the Coastal area, while in the open sea area PAH originated from petrogenic sources. Equal contribution of pyrogenic and petrogenic sources to PAH sediment levels was determined in the Kaštela Bay. Among three examined methods for the identification of PAH sources, Positive Matrix Factorization (PMF) provided the most detailed and accurate informations on the PAHs’ origin. According to the applied criteria, a high environmental risk was determined in each station of the Šibenik Bay; in station near Industrial port of Split and in two stations in Coastal zone; in Zadar area and in the area of Brac-Split Channel. A high level of pollution was determined in the area of Industrial port of Split in Kaštela Bay, in the Zadar area and in the Braĉ-Split Channel, whereas moderate pollution was determined in other investigated stations of the Kaštela Bay and the Coastal area. A low level of pollution was determined for each station in the open sea area. Due to a very high level of pollution, determined at each station of the Šibenik Bay, the entire Šibenik Bay can be considered a HOT SPOT area. Significant linear correlation was observed between PAH levels and the levels of total organic carbon (TOC) and organic matter (OM). Weak or non-existing linear correlation was determined between PAH levels and sediment grain-size distribution.
Keywords
PAH
Jadransko more
sediment
porijeklo PAH-ova
dijagnostiĉki omjeri
PMF
PCA
SQA
oneĉišćenje
Keywords (english)
PAH
Adriatic Sea
sediment
PAH sources
toxicity
PMF
PCA
pollution
Language croatian URN:NBN urn:nbn:hr:226:024050 Study programme Title: Applied Marine Sciences Type of resource Text Extent XXXI, 135 str. ; 30 cm File origin Born digital Access conditions Open access Terms of use Created on 2018-05-14 07:30:27
