master's thesis
Comparison three-stage and single extraction of toxic heavy metals in agricultural soils

Marina Matičević (2016)
Josip Juraj Strossmayer University of Osijek
Faculty of agriculture
DEPARTMENT FOR AGROECOLOGY
Metadata
TitleUsporedba trostupanjske i jednostruke ekstrakcije toksičnih teških metala u poljoprivrednim tlima
AuthorMarina Matičević
Mentor(s)Zdenko Lončarić (thesis advisor)
Abstract
U analiziranim uzorcima tla utvrđen je najveći ukupni sadržaj Cr, zatim Pb, Co i s najnižom ukupnom koncentracijom Cd. Analizirani toksični teški metali uglavnom su unutar granica MDK, a samo je koncentracija Cr u jednom uzorku bila iznad vrijednosti MDK. Redoslijed analiziranih teških metala prema izmjenjivoj prvoj frakciji značajno se razlikuje od redoslijeda prema ukupno ekstrahiranim količinama. Prema koncentracijama prve frakcije na prvom mjestu je Co, zatim Pb i Cd te Cr. U oksidirajućoj trećoj frakciji ekstrahirane količine toksičnih metala jednake su kao i ukupne koncentracije, dok je u reducirajućoj drugoj frakciji izuzetak Pb i Cr, koji su zamjenili mjesta pa je redoslijed druge frakcije Pb > Co > Cr > Cd. U četvrtoj rezidualnoj frakciji na prvom mjestu je Cr, slijedi Co, Pb i na zadnjem mjestu Cd. Udio ispitivanih metala mijenja se po frakcijama, tako je u izmjenjivoj prvoj frakciji najveći udio Co, a najmanji Cr, u reducirajućoj drugoj frakciji najveći je udio Pb, najmanji Cd, u oksidirajućoj trećoj frakciji i u rezidualnoj četvrtoj također je najmanji udio Cd, a najveći Cr. Na temelju ukupne koncentracije, te kiselosti i humoznosti tla regresijskim jednadžbama moguće je predvidjeti udio svake pojedine frakcije analiziranih metala. Odnosi frakcija teških metala različitih su redoslijeda kod analiziranih elemenata, ali su uglavnom konstantni odnosi kod analiziranih uzoraka za Cr, Co i Pb, dok su za Cd između analiziranih uzoraka najveće razlike u redoslijedu frakcija po ekstrahiranim koncentracijama. EDTA otopinom ekstrahirane su vrlo male koncentracije Cr, a Cd još 4,4 puta manje. Koncentracije Cr ekstrahiranog s EDTA čine svega 0,07-2,36 % ukupnih koncentracija u tlu, a koncentracije raspaoloživog Cd čine čak 20-52 % ukupnih koncentracija Cd u tlu.
Keywordsheavy metals fractionation detrimental metals extraction availability
Parallel title (English)Comparison three-stage and single extraction of toxic heavy metals in agricultural soils
Committee MembersVladimir Ivezić (committee chairperson)
Brigita Popović (committee member)
GranterJosip Juraj Strossmayer University of Osijek
Faculty of agriculture
Lower level organizational unitsDEPARTMENT FOR AGROECOLOGY
PlaceOsijek
StateCroatia
Scientific field, discipline, subdisciplineBIOTECHNICAL SCIENCES
Agronomy
Crop Production
Study programme typeuniversity
Study levelgraduate
Study programmePlant Production; specializations in: Plant Production, Plant Nutrition and Soil Science, Plant Selection and Seed Production, Plant Protection
Study specializationPlant Production
Academic title abbreviationmag. ing. agr.
Genremaster's thesis
Language Croatian
Defense date2016-10-26
Parallel abstract (English)
Analyzed toxic heavy metals were mainly within the limits of maximum allowed concentration; only the concentration of Cr in one sample was above maximum allowed concentration. The order of analyzed heavy metals to the removable first fraction was significantly different from the order to the total quantity extracted. According to the concentration of the first fraction in the first place was Co, followed by Pb, Cd and Cr. In oxidizing third fraction extracted amounts of heavy metals were equal to total concentrations, while in reducing second fraction exceptions were Pb and Cr, which changed the order thereby the result of second fraction was Pb > Co > Cr > Cd. In the fourth residual fraction Cr was in the first place, followed by Co, Pb and Cd. The share of analysed metals changes by fractions. In the removable fraction the largest was share of Pb, the lowest of Cr, in the reducing the largest was share of Pb, the lowest of Cd, in oxidizing the third fraction and the residual fourth also has the lowest proportion of Cd, Cr and the largest. The proportion of each analyzed fraction can be predicted by regression equations based on the total metal concentration, soil acidity and humus content. Relations fraction of heavy metals have different sequence of the analyzed elements, but mainly constant relations with samples analyzed for Cr, Co and Pb, while for Cd between samples biggest differences in the order of fractions of the extracted concentrations. EDTA solution extracted very low concentrations of Cr, and 4.4 times less amount of Cd. The concentrations of Cr extracted by EDTA formed only 0.07 - 2.36% of total concentration of Cr in soil, while the concentrations of available Cd formed 20-52% of total concentration of Cd in the soil.
Parallel keywords (Croatian)teški metali frakcionacija toksični metali ekstrakcija raspoloživost
Resource typetext
Access conditionOpen access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
Notediplomski rad
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:151:634993
CommitterLjiljana Vučković Vizentaner