Potencijalno toksični elementi u profilima tla urbanog područja Zagreba

master's thesis

• Title (english): Potentially toxic elements in soil profiles in the urban area of Zagreb
• Author: Mirna Švec
• Mentor: Marija Romić (mentor)
• Mentor: Hana Fajković (mentor)
• Committee member: Hana Fajković (predsjednik povjerenstva)
• Committee member: Marijan Kovačić (član povjerenstva)
• Committee member: Katarina Gobo (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2019-02-20, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

Tla u urbanim područjima izložena su unosu onečišćujućih tvari iz brojnih izvora. Osim antropogenih izvora onečišćenja, na koncentraciju elemenata u tlima utječe i različitost litološkog sastava područja, budući da tla nastaju pedogenetskim procesima iz matičnog supstrata, odnosno geološke podloge. U obzir se uzimaju i faktori koji utječu na retenciju i otpuštanje elemenata u tlima, kao što su granulometrija, pH, udjel karbonata i organske tvari. Na području koje administrativno pripada Gradu Zagrebu otvoreni su i morfološki ispitani pedološki profili na lokacijama koje se razlikuju kako litološki tako i po načinu korištenja i održavanja krajolika. Uzorci tala uzeti su iz genetskih horizonata za ispitivanje osnovnih kemijskih i geokemijskih značajki tla, uključujući potencijalno toksične elemente propisane Pravilnikom o zaštiti poljoprivrednog zemljišta od onečišćenja: kadmij, krom, bakar, živa, nikal, olovo i cink. Statistički se analiziraju rasponi koncentracija potencijalno toksičnih elemenata po dubini profila te traže uzroci varijacija i odstupanja koncentracija. Utvrđeno je da tla u Gradu Zagrebu općenito nisu onečišćena elementima, a primjećena obogaćenja elementima u pojedinim profilima povezuju se ili s geogenim porijeklima, u slučaju šire rasprostranjenih i blažih obogaćenja, ili s točkastim antropogenim izvorima u slučaju lokaliziranih izrazito povišenih koncentracija.

Abstract (english)

Soils in urban areas are exposed to input of pollutants from many sources. Aside from the anthropogenic sources of pollution, lithology additionally greatly impacts the concentration of specific elements in soils due to soil formation from the parent substrate. Other factors need to be taken into consideration as well, such as granulometry, pH, total content of carbonates and organic matter. On the administrative area of the city of Zagreb, soil profiles were opened and morphologically tested at locations differing in lithology as well as the means of use and landscape maintenance. Soil samples were collected from genetic soil horizons to determine basic chemical and geochemical properties, including concentrations of potentially toxic elements as defined in the directive Ordinance on the Protection of Agricultural Land from Pollution: cadmium, chromium, copper, mercury, nickel, lead and zinc. The variations of concentrations in potentially toxic elements are statistically analysed with profile depth, to differentiate geological from anthropogenic effects on the contents of elements in the soils. It has been determined that soils in Zagreb are generally not contaminated, and enrichments can be interpreted as either geogenic in origin, in the case of widely distributed enrichments of lower concentration levels, or anthropogenic in origin in the case of localized high enrichments of element concentrations.

• Keywords: potencijalno toksični elementi; matični supstrat; tlo; Zagreb
• Keywords (english): potentially toxic elements; parent substrate; soil; Zagreb
• Language: croatian
• URN:NBN: urn:nbn:hr:217:108737
• 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: 2021-02-20
• Created on: 2019-02-28 09:57:45