Influence of the organic complex concentration on adsorption of herbicide in organic modified montmorillonite
Durović-Pejcev, Rada D.
Vulić, Predrag J.
Ašanin, Darko P.
Article (Published version)
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This study was undertaken to determine the impact of the organic complex concentration on the adsorption of herbicide (acetochlor) at the surface of the organic modified montmorillonite. In this work, natural montmorillonite from Bogovina (Boljevac municipality, Serbia) was used for organic modification. Cation-exchange capacity of this montmorillonite was determined using a methylene blue method (86mmol/100g of clay). Montmorillonite has been modified first with NaCl and then with hexadecyltrimethylammonium bromide (HDTMA-bromide) organic complex. Saturation of cation exchange capacity (CEC) was 50%, 100%, and 150%. Changes in the properties of the inorganic and organic montmorillonite have been examined using the X-ray diffraction, Fourier transform infrared spectroscopy, and batch equilibrium method. Montmorillonite modified with HDTMA-bromide demonstrated higher uptake of the herbicide, compared to the inorganic montmorillonite. Comparing the values Freundlich coefficients in batch... equilibrium method, it can be seen that the adsorption of acetochlor decreased in the series: 0.5 CEC HM > 1 CEC HM > 1.5 CEC HM > NaM.
Keywords:Montmorillonite / X-ray diffraction (XRD) / batch equilibrium method / hexadecyltrimethyl-ammonium bromide
Source:Journal of Environmental Science and Health Part B-Pesticides Food Contaminants and Agricultural Was, 2017, 52, 5, 291-297
- Taylor & Francis Inc, Philadelphia
Funding / projects:
- Minerals of Serbia: composition, genesis, application and contribution to the environmental sustainability (RS-176010)
- Studies on plant pathogens, arthropods, weeds, and pesticides with a view to developing the methods of biorational plant protection and safe food production (RS-31043)