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Adsorption of alachlor by montmorillonites

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Abstract

The adsorption of the tertiary aromatic amide alachlor by Na-montmorillonite and Al-polyhydroxy-montmorillonite was investigated by DTA, XRD, SEM and Thermo-FTIR Spectroscopy. This molecule is adsorbed into the interlayer space of the montmorillonite, replacing interlayer water. In this organo-clay complex the interlayer water forms hydrogen bonds with N or O atoms of the tertiary amide group. Samples which were aged during six months degraded by hydrolysis to give mainly secondary amide. This reaction was catalysed by Al-polyhydroxy-montmorillonite more than by Na-montmorillonite.

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Authors and Affiliations

  1. The Volcani Center, ARO, Institute of Soils and Water, P.O.Box 6, 50250, Bet Dagan

    A. Nasser, M. Gal, Z. Gerstl & U. Mingelgrin

  2. The Department of Inorganic and Analytical Chemistry, The Hebrew University of Jerusalem, 91904, Jerusalem, Israel

    S. Yariv

Authors
  1. A. Nasser
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  2. M. Gal
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  3. Z. Gerstl
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  4. U. Mingelgrin
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  5. S. Yariv
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Dedicated to Prof. Menachem Steinberg on the occasion of his 65th birthday

This research was supported in part under Grand No. HRN5544 GOO2069, US-Israel Cooperative Development Research Program, Human Capacity Development, Bureau for Global Programs, Field Support and Research, USAID, and in part under Grant No. I 195128 12/91, German-Israeli Foundation (GIF) for Scientific Research and Development.

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Nasser, A., Gal, M., Gerstl, Z. et al. Adsorption of alachlor by montmorillonites. Journal of Thermal Analysis 50, 257–268 (1997). https://doi.org/10.1007/BF01979566

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