Influence of the organic complex concentration on adsorption of herbicide in organic modified montmorillonite

Autor:	Predrag Vulić, Zorica Tomić, Rada Đurović-Pejčev, Darko P. Ašanin, Lazar M. Kaluđerović
Rok vydání:	2017
Předmět:	Toluidines Inorganic chemistry 02 engineering and technology 010501 environmental sciences X-ray diffraction (XRD) 01 natural sciences chemistry.chemical_compound Adsorption X-Ray Diffraction Spectroscopy Fourier Transform Infrared Cation-exchange capacity Freundlich equation Acetochlor Fourier transform infrared spectroscopy Montmorillonite 0105 earth and related environmental sciences Cetrimonium Herbicides Chemistry hexadecyltrimethyl-ammonium bromide General Medicine 021001 nanoscience & nanotechnology Pollution Methylene Blue Bentonite Cetrimonium Compounds Clay Aluminum Silicates Environmental Pollutants batch equilibrium method 0210 nano-technology Saturation (chemistry) Serbia Methylene blue Food Science
Zdroj:	Journal of Environmental Science and Health Part B-Pesticides Food Contaminants and Agricultural Was
ISSN:	1532-4109 0360-1234
DOI:	10.1080/03601234.2017.1281636
Popis:	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.
Databáze:	OpenAIRE
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