Adsorption of Parathion, Fenitrothion, Methyl Parathion, Aminoparathion and Paraoxon by Na+, Ca2+, and Fe3+ Montmorillonite Suspensions

Bowman, B. T.; Sans, W. W.

doi:10.2136/sssaj1977.03615995004100030016x

Cited by 45 publications

(40 citation statements)

References 8 publications

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“…Similar results were obtained for the adsorption of fenitrothion, methyl parathion, aminoparathion and paraoxon (Bowman and Sans 1977). The adsorption of phosphamidon on montmorillonite followed the order Na"*" > h"*" > Ca^"*" (Singhal and Singh 1978).…”

Section: +supporting

confidence: 79%

“…Hysteresis has been observed in the parathion sorption isotherms by several workers Bowman and Sans 1977;Wahid and Sethunathan 1978). Soils pretreated with HgOg desorbed much more parathion than untreated soils (Wahid and Sethunathan 1978).…”

Section: Adsorption Of Chlorinated Hydrocarbon Insecticidesmentioning

confidence: 87%

“…In dehydrated systems, -NOg could coordinate directly with metallic cations adsorbed on the clay. Bowman and Sans (1977) observed that more than 99.9% of amino-3+ parathion in solution was adsorbed by Fe -montmorillonite. They suggested that the -NHg group was protonated by the acidic clay surface, thus raising the possibility of adsorption by an exchange mechanism.…”

Section: +mentioning

confidence: 99%

“…Adsorption of parathion on montmorillonite decreased in the order > Na^ (Bowman and Sans 1977). Infrared spectroscopic studies indicated that parathion sorbed by montmorillonite coordinates through water molecules with the metallic cations in the interlayer spaces of the clay (Saltzman and Yariv 1976).…”

Section: +mentioning

confidence: 99%

“…Bowman and Sans (1977) reported that the adsorption of parathion, methyl parathion, fenitrothion, and aminoparathion at low concentrations varied inversely with their + 2+ water solubilities in Na -and Ca -montmorillonite suspensions. The adsorption and desorption of leptophos and 6 herbicides on organic matter were compared and excellent correlation was found with the log of water solubility and percent adsorbed (Carringer et al 1975) Less carbaryl was adsorbed on organic matter than parathion (Leenheer and Ahlrichs 1971).…”

Section: +mentioning

confidence: 99%

See 4 more Smart Citations

Sorption of organophosphorus and carbamate insecticides by soil

Felsot¹,

Dahm²

1979

J. Agric. Food Chem.

133

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Section: +supporting

confidence: 79%

Section: Adsorption Of Chlorinated Hydrocarbon Insecticidesmentioning

confidence: 87%

Section: +mentioning

confidence: 99%

Section: +mentioning

confidence: 99%

Section: +mentioning

confidence: 99%

See 3 more Smart Citations

Sorption of organophosphorus and carbamate insecticides by soil

Felsot¹,

Dahm²

1979

J. Agric. Food Chem.

133

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Adsorption, decomposition and movement of oxamyl in soil

Gerstl

1984

Pestic. Sci.

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A study was conducted of the behaviour of oxamyl in Israeli soils of varying clay and organic matter contents. The adsorption isotherms for oxamyl were linear, and the adsorption coefficient (Kd) could be correlated to the clay content of the soils, as well as to the organic matter content of the soil. Oxamyl adsorption was underestimated by using published correlations between the adsorption and the chemical properties of pesticides, such as their solubility or octan‐1‐ol‐water partition coefficient. The decomposition of oxamyl in soils followed first‐order kinetics. The half‐life ranged from 4 to 33 days in a Bet Dagan soil. The reaction rate increased with increasing moisture content of the soil until field capacity was reached, at which point it levelled off. The Arrhenius relationship was followed, with degradation proceeding more rapidly at higher temperatures. In several soils of varying composition, which were kept at field capacity, no difference in the degradation rates was observed. Oxamyl was applied to a Bet Dagan soil from a point source in a single pulse, as a split application, and on a continuous basis. The distribution patterns of oxamyl under the various treatments differed significantly. After the single‐pulse application, oxamyl was leached out of the emitter zone. While the split application decreased the oxamyl‐free zone, the best results were obtained by continuous application, which gave a nearly uniform distribution of oxamyl in the soil.

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