Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine
Sorption of herbicides on inorganic and organic modified natural montmorillonite from Bogovina
Author
Kaluđerović, Lazar M.
Mentor
Erić, SuzanaCommittee members
Tomić, ZoricaĐurović-Pejčev, Rada
Vulić, Predrag

Đorđević, Aleksandar

Metadata
Show full item recordAbstract
fikasnost prilikom sorpcije S-metolahlora i klomazona od strane neorganskih i
organski modifikovanih montmorionita sa lokaliteta Bogovina odreĎena je metodom
bach adsorpcije. Uzorci montmorionita su tretirani prvo rastvorom NaCl a zatim i
različitim koncentracijama organskih kompleksa. Adsorpcione izoterme su dobijene
tretiranjem uzoraka različitim koncentracijama herbicida. Detaljna mineraloška
karakterizacija uzoraka uraĎena je metodom rendgenske difrakcije. Rezultati interakcije
montmorionita sa organskim kompleksima i herbicidima dobijeni su primenom
rendgenskih, optičkih, termičkih i spektroskopskih metoda.
Na osnovu rezultata rendgenskih ispitivanja uzoraka, utvrĎeno je prisustvo
organskih kompleksa i herbicida u meĎuslojnom prostoru montmorionita.
Montmorioniti modifikovani sa HDTMA kompleksom pokazivali su jednoslojnu,
dvoslojnu i pseudotroslojnu orijentaciju HDTMA+ katjona u meĎuslojnom prostoru.
UtvrĎeno je da HDTMA+ katjoni formiraju particionu fazu na površini montmorionita...,
na kojoj dolazi do sorpcije molekula herbicida. Sa druge strane, montmorioniti
modifikovani sa PTMA kompleksom pokazivali su jednoslojnu orijentaciju katjona na
površini montmorionita i to na takav način da se katjoni ponašaju kao stubovi koji u
zavisnosti od dimenzija dovode do širenja meĎuslojnog prostora. Molekuli herbicida se
u tom slučaju vezuju za površinu montmorionita.
Primenom metode infracrvene spektroskopije utvrĎeno je koje funkcionalne
grupe učestvuju u interakciji izmeĎu montmorionita, organskih kompleksa i herbicida.
Visoka sposobnost sorpcije odreĎenih uzoraka organski modifikovanih
montmorionita otvara mogućnost njihove primene kao potencijalne sirovine za
uklanjanje S-metolahlora i klomazona iz ţivotne sredine...
Efficiency of inorganic and organic modified montmorillonites from Bogovina
for sorption of the S-metolachlor and clomazone was determined using batch adsorption
method. Montmorillonite samples were pretreated with NaCl solution and then with
different concentrations of organic complexes. Adsorption isotherms were measured by
treatment of the samples with different concentrations of herbicide. Detailed
mineralogical characterization of samples was performed using the X-ray diffraction
method. Results of interaction between organic complexes and herbicides were obtained
using X-ray diffraction, optical, thermal and spectroscopic analysis.
Based on the results obtained using X-ray diffraction, it was concluded that all
examined organic complexes and herbicides intercalated into interlayer space of
montmorillonite. Montmorillonites modified with HDTMA complex exhibited
monolayer, bilayer and pseudotrilayer arrangement of HDTMA+ cations in interlayer
space, depending on degree of saturatio...n. It has been found that the HDTMA+ cations
are forming the partition phase for the herbicide on the surface of the montmorillonite.
On the other hand, montmorillonite modified with PTMA complex exhibited monolayer
arrangement of cations on the surface of montmorillonite in such a way that the cations
act as pillars in interlayer space. The molecules of herbicides in this case were adsorbed
on the surface of the montmorillonite.
Which functional groups were involved in bonding processes between
montmorillonite, organic complex and herbicide best describes infrared spectroscopy.
High sorption of examined herbicides on some organic modified
montmorillonites creates an opportunity for application of these substrates as potentially
useful material for removal of S-metolachlor and clomazone from the environment.
Faculty:
Универзитет у Београду, Рударско-геолошки факултетDate:
17-01-2018Projects:
- Studying climate change and its influence on environment: impacts, adaptation and mitigation (RS-43007)
- Minerals of Serbia: composition, genesis, application and contribution to the environmental sustainability (RS-176010)