Binding of persistent and nonpersistent 14C-labeled insecticides in an agricultural soil

Lichtenstein, E. P.; Katan, J.; Anderegg, Barbara N.

doi:10.1021/jf60209a015

Cited by 85 publications

(32 citation statements)

References 13 publications

(22 reference statements)

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“…It is interesting to note that the more persistent pesticides (DDT, dieldrin) exhibit less binding tendencies than do the relatively non-persistent pesticides such as methyl parathion and fonofos (9,13,14). Large apparent hysteresis effects reported for compounds such as methyl parathion or fonofos may in fact be a consequence of their relative instability in soil-water systems, quite unrelated to true hysteresis.…”

Section: Resultsmentioning

confidence: 99%

Partitioning Behavior of Insecticides in Soil‐Water Systems: II. Desorption Hysteresis Effects

Bowman¹,

Sans²

1985

J of Env Quality

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This investigation was undertaken to determine whether desorption hysteresis effects were dependent upon methods used in obtaining desorption data. Adsorption‐desorption isotherms were obtained for two organophosphorus insecticides in aqueous suspensions of a clay, a sandy loam, and an organic soil. Desorption isotherms were obtained using both the consecutive desorption method and the dilution method. In the consecutive method, the same sample (after adsorption step) was put through a series of equilibration‐centrifugation steps in which, following equilibration, the adsorbent was thrown down by centrifugation, and part of the supernatant pesticide solution was replaced by distilled water before reequilibration. In the dilution method a series of replicate samples (same adsorbent weight), after the adsorption step, were diluted to different volumes with distilled water, reequilibrated, then centrifuged to separate the phases. With the exception of one insecticide‐soil system (where both methods produced minimal hysteresis), hysteresis effects were considerably reduced by using the dilution method. Repeated centrifugation appeared to be associated with the appearance of hysteresis effects observed using the consecutive desorption method. A short discussion is included on the improper use of desorption data to construct “single point desorption isotherms,” which has created confusion in the literature.

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Section: Resultsmentioning

confidence: 99%

Partitioning Behavior of Insecticides in Soil‐Water Systems: II. Desorption Hysteresis Effects

Bowman¹,

Sans²

1985

J of Env Quality

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“…Already in 1977 Lichtenstein et al (26) reported the formation of bound 14 C-labeled DDT on agricultural soil accompanied by a drastically reduced insecticidal activity of the associated proportion. Also recent studies confirmed the decrease of DDT toxicity with time after application to soils as a result of less bioavailibility due the incorporation into the nonextractable particulate matter (27).…”

Section: Introductionmentioning

confidence: 99%

DDT-Related Compounds Bound to the Nonextractable Particulate Matter in Sediments of the Teltow Canal, Germany

Schwarzbauer

Ricking

Littke

2003

Environ. Sci. Technol.

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Sediment samples of the Teltow Canal (Berlin, Germany) were analyzed with respect to extractable and nonextractable organic compounds. The study focused on the identification and quantitation of bound 2,2-bis(chlorophenyl)-1,1,1-trichlorethane (DDT) residues in order to obtain further information about the fate of DDT-derived compounds within the particulate matter of the aquatic environment. Various chemical degradation techniques and a complementary online pyrolysis-GC/MS method were applied to the pre-extracted sediment residues. Generally, the distribution of the bound DDT-related compounds was found to differ distinctly from the substances distribution within the extractable fraction. The main metabolite of the anaerobic degradation pathway (2,2-bis(chlorophenyl)-1,1-dichlorethane, DDD) is most abundant in the sediment extracts but occurred only in insignificant concentrations in the degradation products of all procedures applied. The most abundant DDT-metabolites released after the degradation procedures were 4,4'-DBP, 4,4'-DDA, and 4,4'-DDM. In addition, 4,4'-DDM was detected at rather high concentrations by pyrolytic analysis. The results imply a weak association to the nonextractable particulate matter based on noncovalent interactions for the observed DDT-related contaminants. The release of these compounds was initiated by the modification and degradation of the organic macromolecular matrix as well as of the inorganic material. Furthermore, numerous methoxychlor-related compounds were detected not only in the extracts but also in parts of the hydrolysis products.

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“…Strong DDT binding has been demonstrated in Wisconsin soil (Lichtenstein et al 1977), a wide range of tropical soils (FAO/IAEA 1994), Canterbury soil (New Zealand; unpubl. data), and Indian soils (Samuel et al 1988;Samuel & Pillai 1989, 1991Nair et al 1992).…”

Section: Strongly Bound Residuesmentioning

confidence: 99%

DDT residues in the environment—A review with a New Zealand perspective

Boul¹

1995

New Zealand Journal of Agricultural Research

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Binding of persistent and nonpersistent 14C-labeled insecticides in an agricultural soil

Cited by 85 publications

References 13 publications

Partitioning Behavior of Insecticides in Soil‐Water Systems: II. Desorption Hysteresis Effects

Partitioning Behavior of Insecticides in Soil‐Water Systems: II. Desorption Hysteresis Effects

DDT-Related Compounds Bound to the Nonextractable Particulate Matter in Sediments of the Teltow Canal, Germany

DDT residues in the environment—A review with a New Zealand perspective

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