Near-infrared spectroscopy study for determination of adsorbed acetochlor in the organic and inorganic bentonites

Tomić, Zorica P; Ašanin, Darko; Đurović, Rada; Đorđević, Aleksandar; Makreski, Petre

doi:10.1016/j.saa.2012.08.035

Near-infrared spectroscopy study for determination of adsorbed acetochlor in the organic and inorganic bentonites

Journal

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Date Issued

2012-12

Author(s)

Tomić, Zorica P

Ašanin, Darko

Đurović, Rada

Đorđević, Aleksandar

DOI

10.1016/j.saa.2012.08.035

Abstract

NIR spectroscopy is used to determine acetochlor herbicide adsorption on Na-montmorillonite (NaP) and organically modified montmorillonite (NaOM). Both montmorillonites NIR spectra shows bands at 7061 and 6791 cm(-1). Organo-montmorillonite is characterised by two emphasized bands at 5871 and 5667 cm(-1) that are attributed to the fundamental overtones of the mid-IR bands at 2916 and 2850 cm(-1). Bands at 6017 and 6013 cm(-1) are attributed to acetochlor adsorbed to organo-montmorillonite and Na-montmorillonite, which is confirmed by X-ray powder diffraction (XRPD). Greater quantity of acetochlor is adsorbed to organo-clays compared to non-modified montmorillonite. Acetochlor poses high risk to environmental contamination. Organo-clays are the most useful for removing acetochlor from water and soil.