Procjena mobilnosti bakra u različitim tipovima vinogradarskih tala

master's thesis

• Title (english): Assesment of copper mobility in different typs of vineyard soils
• Author: Dorotea Petljak
• Mentor: Monika Zovko (mentor)
• Committee member: Monika Zovko (predsjednik povjerenstva)
• Committee member: Gabrijel Ondrašek (član povjerenstva)
• Committee member: Aleksandra Bensa (član povjerenstva)
• Committee member: Lana Filipović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Soil Amelioration); Zagreb
• Defense date and country: 2019-09-18, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Problem metala u poljoprivrednom okolišu potenciran je njihovom mogućnošću mobilizacije pod određenim fizikalnim i kemijskim uvjetima tla. Izravna posljedica mobilizacije je brže premještanje metala u dublje slojeve tla, a time i mogućnost kontaminacije podzemnih voda. Problem mobilnosti metala u uvjetima nagnutih terena potenciran je erozijskim procesima, što procjenu rizika mobilnosti metala čini izuzetno zahtjevnom i kompleksnom. Najčešće je povećana mobilnost metala u tlu posljedica poboljšavanja plodnosti tla.
Ciljevi ovog istraživanja su utvrditi postoje li razlike u sorpciji i desorpciji bakra na adsorpcijski kompleks tla između dva odabrana tipa vinogradarskih tala.
U ovom diplomskom radu proveden je laboratorijski pokus sorpcije i desorpcije bakra na uzorcima tla prikupljenih u vinogradima pokušališta Jazbina s 0-15 i 75-100 cm dubine i pokusnog nasada Baštica s 0-25 i 75-100 cm dubine. U pokusu je korištena zasićena otopina bakrovog (II) nitrata u rastućim koncentracijama (25, 50, 100 i 200 mg/l), a sva mjerenja izvršena su u triplikatu. Sorpcijske izoterme su konstruirane za sve istraživane horizonte tla.
Utvrđena je najveća sorpcija i retenacija bakra u pseudogleju obronačnom, na lokaciji pokušalište Jazbina, u površinskom (0-15 cm) sloju tla, što je potvrđeno i najvećim koeficijentom distribucije (99,003 ml/g). Najmanja sorpcija i retencija utvrđene su u tlu, rigosol, pokusnog nasada Baštica na dubini od 75-100 cm.
Temeljem rezultata sorpcijskog eksperimenta konstruirane su sorpcijske izoterme bakra za oba istraživana vinogradarska tla, koje se prema visokom korelacijskom koeficijentu (R2 = 0,9999) jako dobro poklapaju sa Freundlichovim modelom izotermi.
Na temelju dobivenih rezultata može se zaključiti da je bakar relativno imobilan i slabo biopristupačan metal koji se najviše nakuplja u površinskim horizontima.

Abstract (english)

The problem with metals in agricultural environments is enhanced by their potential for mobilization under specific physical and chemical soil conditions. Direct effect of this mobilization is faster translocation of metals into deeper soil layers, and thereby possible contamination of groundwater. The problem with metal mobility on sloping terrains is exacerbated by erosion processes making the assessment of metal mobility risk extremely demanding and complex. Increased mobility of metals in the soil is a frequent effect of fertilization.
The aim of this study is to determine if there are differences in the sorption and desorption of copper in the adsorption complex between two selected types of vineyard soils.
A laboratory experiment of sorption and desorption of copper was carried out on soil samples collected in vineyards at two location: experimental station Jazbina (0-15 and 75-100 cm) and experimental vineyard Baštica (0-25 and 75-100 cm). In these experiments copper (II) nitrate solution was used in various concentrations (25, 50, 100 and 200 mg/l) and all measurements were made in triplicate. Sorption isotherms were constructed for all soil horizons studied.
The highest sorption and retention capacity was determined in pseudogley on slope, experimental station Jazbina in topsoil (0-15 cm), which was confirmed by the highest distribution coefficient (99,003 ml/g). Furthermore, the lowest sorption and retention capacity was determinated in rigosol, experimental vineyard Baštica, at a depth of 75 to 100 cm.
Based on the results of the sorption experiment, copper sorption isotherms are constructed for both experimental sites, which fit very well with the Freundlich model of isotherms according to the high correlation coefficient (R2 = 0.9999).
Based on the obtained results it can be concluded that copper is a relatively immobile and less bioavailable metal that is most accumulated in the topsoil.

• Keywords: mobilnost; bakar; sorpcija; desorpcija; vinogradarska tla; sorpcijske izoterme
• Keywords (english): mobility; copper; sorption; desorption; vineyard soil; sorption isotherms
• Language: croatian
• URN:NBN: urn:nbn:hr:204:565658
• Study programme: Title: Agroecology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka agroekologija (magistar/ magistra inženjer/inženjerka agroekologija)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-10-09 06:47:30