Ekstrakcija triazinskih herbicida u zavisnosti od karakteristika zemljišta /Triazine herbicides extraction depending on the soil characteristics
2016
Ćućuz, Milica (Poljoprivredni fakultet, Novi Sad (Srbija). Departman za fitomedicinu i zaštitu životne sredine) | Bursić, Vojislava (Poljoprivredni fakultet, Novi Sad (Srbija). Departman za fitomedicinu i zaštitu životne sredine) | Vuković, Gorica (Institut za javno zdravlje, Beograd (Srbija)) | Dapčević, Vladimir (Poljoprivredni fakultet, Novi Sad (Srbija). Departman za fitomedicinu i zaštitu životne sredine) | Ćirić, Vladimir (Poljoprivredni fakultet, Novi Sad (Srbija). Departman za fitomedicinu i zaštitu životne sredine) | Zeremski, Tijana (Institut za ratarstvo i povrtarstvo, Novi Sad (Srbija)) | Đurović-Pejčev, Rada (Institut za pesticide, Beograd (Srbija))
The work investigates the behavior of herbicides from the chemical groups of triazine according to different physical and chemical characteristics of the soil. The fate and mobility of pesticides, including triazine, in the environment primarily depend on the adsorption because the degradation, metabolism, microbial degradation and mobility comprise only the free (non-adsorbed) fraction of molecules of these compounds. The pesticide-soil sorption interaction may comprise either mineral or organic components or sometimes both. The sorption of pesticides is based on two phenomena: weak chemical bonding and diffusion of the components through the soil structures. The sorption of pesticides in soil does not refer only to the contamination of soil but also of water systems which are in contact with such soils and to a great extent determine the intensity of mobility of these compounds in the environment. The free fraction of pesticide molecules can float through the aqueous phase while the bonded components will remain depending on the sorption properties of pesticides, physic-chemical characteristics of the soil as well as on the characteristics of the aqueous phase. The leakage of pesticides into the deeper layers of soil to groundwater is a complex process controlled by the conditions prevailing in the soil and in the environment. Therefore, the subject of this research work is to determine the extraction yields of the studied analytes depending on the physic-chemical soil properties within the validation of multi-residual method for the determination of the residues of herbicides and their metabolites from the triazine group in soil by LC-MS/MS.
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