PMID: 11714329Nov 21, 2001Paper

Organo-clay formulation of acetochlor for reduced movement in soil

Journal of Agricultural and Food Chemistry
Yasser El-NahhalBaruch Rubin

Abstract

This study aimed to design ecologically acceptable formulations of acetochlor by adsorbing it on montmorillonite exchanged by a small organic cation, phenyltrimethylammonium (PTMA). Adsorption of acetochlor on the clay mineral exchanged with different organic cations and its release from these complexes were determined by GC and modeled by Langmuir equation. Interactions between acetochlor molecules and the exchanged organic cation on the clay surface were studied by Fourier transform infrared spectroscopy. Leaching of acetochlor in soil was determined by a bioassay using a column technique and Setaria viridis as a test plant. The adsorbed amounts of acetochlor on montmorillonite exchanged by PTMA at a loading of 0.5 mmol/g of clay were higher than at a loading up to the cation-exchange capacity, i.e., 0.8 mmol/g, and were higher than obtained by using a clay mineral exchanged by other organic cations. Preloading montmorillonite by PTMA at 0.5 mmol/g yielded maximal shifts of the infrared peaks of the herbicide. The above formulation of acetochlor yielded slow release in water and showed improved weed control in field and greenhouse experiments in comparison with the commercial formulation. The PTMA-clay formulation of acetochl...Continue Reading

Citations

Dec 4, 2013·Journal of Agricultural and Food Chemistry·Haim Katz, Yael G Mishael
Jul 30, 2003·Journal of Colloid and Interface Science·Tomasz KwolekJan Czapkiewicz
Sep 18, 2012·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Zorica P TomićPetre Makreski
Sep 1, 2009·Journal of Environmental Management·Marek MajdanAleksander Padewski
Feb 8, 2014·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Mehran ShirvaniOladele A Ogunseitan
May 1, 2018·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Lazar M KaluđerovićBranka J Kresović
Mar 10, 2017·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Lazar M KaluđerovićDarko P Ašanin
Aug 22, 2003·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Yasser El-Nahhal

Related Concepts

Halloysite
Acetochlor
Adsorption
Aluminum Silicates
Herbicides
Humus
Aminotoluene
Spectroscopy, Fourier Transform Infrared

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