Selenium and trace metal content in selected vegetables from Raša and Opatija towns, and their estimated daily intakes

master's thesis

• Title (croatian): Sadržaj selena i metala u tragovima u odabranom povrću s područja Raše i Opatije te njihovi procijenjeni dnevni unosi
• Author: Tina Zorić
• Mentor: Gordana Medunić (mentor)
• Mentor: Željka Fiket (mentor)
• Committee member: Sven Jelaska (predsjednik povjerenstva)
• Committee member: Nenad Buzjak (član povjerenstva)
• Committee member: Blanka Cvetko-Tešović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2020, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

The lack of legislative measures and advanced technologies results in adverse effects of mining, coal combustion and inappropriate waste disposal on the environment. An example is high-sulphur seleniferous Raša coal. Total of 12 soil samples and 22 vegetable samples from the area of Raša, Krapan and Opatija, the latter used as an area representing natural environmental conditions, were examined. Total element concentrations in the samples were determined by HR-ICP mass spectrometry after... More digestion in a specialized microwave oven. All samples were analysed for total concentrations of 32 elements (Al, As, Ba, Be, Bi, Ca, Cd, Co, Cr, Cs, Cu, Fe, Li, Mg, Mn, Mo, Na, Ni, P, Pb, Rb, S, Sb, Sc, Se, Sn, Sr, Ti, Tl, U, V, and Zn). The obtained results showed that the soil of Krapan and Raša is contaminated with Cd, Mo, Pb and Se. Based on the measured element levels in vegetable samples, the hazard quotient for the elements: As, Cd, Cr, Cu, Fe, Mn, Mo, Ni, Se, Sn, and Sr, and the estimated daily intake for the following elements: As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Se, and Zn in vegetable samples from the area of Raša, Krapan and Opatija were calculated. The hazard quotient did not exceed 1 for any element included in the calculation, while the estimated daily intake higher than the maximum allowed was calculated for all elements, except Zn, at all locations. The results show that in the area of Raša and Krapan the soil and vegetables are contaminated with metals, but the same is true for Opatija. Less

Abstract (croatian)

Nedostatak zakonodavnih mjera i naprednih tehnologija ima za posljedicu nepovoljne učinke rudarstva, izgaranja ugljena i neprikladnog odlaganja otpada po okoliš. Primjer je Raški visokosumporni selenozni ugljen. Ispitano je 12 uzoraka tla i 22 uzorka povrća s područja Raše, Krapna i Opatije. Potonja lokacija je odabrana kao područje koje predstavlja prirodne okolišne uvjete. Ukupne koncentracije elemenata u uzorcima određene su spektrometrijom masa visoke razlučivosti uz induktivno... More spregnutu plazmu nakon raščinjavanja u specijaliziranoj mikrovalnoj pećnici. Svi su uzorci analizirani na ukupne koncentracije 32 elementa (Al, As, Ba, Be, Bi, Ca, Cd, Co, Cr, Cs, Cu, Fe, Li, Mg, Mn, Mo, Na, Ni, P, Pb, Rb, S, Sb, Sc, Se, Sn, Sr, Ti, Tl, U, V, Zn). Rezultati analiza ukazuju na onečišćenje tla u Raši i Krapnu sljedećim elementima: Cd, Mo, Pb i Se. Na temelju dobivenih koncentracija elemenata u uzorcima povrća izračunat je kvocjent opasnosti za elemente: As, Cd, Cr, Cu, Fe, Mn, Mo, Ni, Se, Sn i Sr, te procjena dnevnih unosa za sljedeće elemente: As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Se i Zn u uzorcima povrća s područja Raše, Krapna i Opatije. Kvocjent opasnosti nije prešao 1 ni za jedan element uključen u izračun, dok je procijenjeni dnevni unos veći od maksimalnog dozvoljenog izračunat za sve elemente, osim Zn, na svim lokacijama. Rezultati pokazuju da su tlo i povrće na području Raše i Krapna opterećeni metalima i Se, no isto vrijedi i za Opatiju. Less

• Keywords: high-sulphur selenifeorus coal; vegetables; hazard quotient; estimated daily intake; Raša; Krapan; Opatija
• Keywords (croatian): visokosumporni selenozni ugljen; povrće; kvocjent opasnosti; procijenjeni dnevni unos; Raša; Krapan; Opatija
• Language: english
• URN:NBN: urn:nbn:hr:217:906705
• 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: Open access
• Created on: 2020-12-10 13:05:56