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Methazole Adsorption-Desorption in Soil

Published online by Cambridge University Press:  12 June 2017

William C. Koskinen
William C. Koskinen*
Affiliation:
South. Weed Sci. Lab., U.S. Dep. Agric., Agric. Res. Ser., Stoneville, MS 38776
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Abstract

Adsorption and desorption of 14C-methazole [2-(3,4-dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dione] were characterized on two silt loam soils (Dundee and Palouse; 0.7 and 3.0% organic matter, respectively) using the batch equilibration technique. Freundlich adsorption isotherm coefficients (Kf and l/n) were calculated after equilibration of methazole solutions (initial concentrations = 0.11 to 4.10 nmol/ml) with soil for various times. After a rapid attainment of an apparent equilibrium, 14C- concentration in solution for the Palouse soil decreased at a low rate. The greater adsorption (Kf) on the Palouse soil, for a given equilibration period, was attributed to the greater organic matter content. The continued trend of increase in apparent Kf with time was due to degradation of methazole in solution to 3-(3,4-dichlorophenyl)-1-methylurea (DCPMU), which was highly adsorbed, rather than to increased adsorption of the parent compound. The calculated adsorption coefficients expressed in terms of soil organic carbon would classify methazole and DCPMU as immobile in Palouse soil and methazole as slightly mobile in Dundee soil. Calculated desorption isotherms, which exhibited a hysteretic effect, were also dependent on the rate of methazole degradation. The adsorption, desorption, and degradation data indicate that methazole would not leach readily in most soils.

Keywords

HysteresisdegradationDCPMUDCPU
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 32 , Issue 2 , March 1984 , pp. 273 - 278
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

Literature Cited

1. Bond, W. and Roberts, H. A. 1976. Persistence of methazole activity in soil. Weed Res. 16:23–26.Google Scholar
2. Brockman, F. E. and Duke, W. B. 1977. Degradation and leaching of methazole in soil. Weed Sci. 25:304–308.Google Scholar
3. Cotterill, E. G. 1980. Determination of residues of methazole and its metabolites, 1-(3,4-dichlorophenyl)-3-methylurea and 1-(3,4-dichlorophenyl)urea in soil by high-performance liquid chromatography. J. Chromatogr. 197:267–270.Google Scholar
4. Dorough, H. W., Whitacre, D. M., and Cardona, R. A. 1973. Metabolism of the herbicide methazole in cotton and beans, and the fate of certain of its polar metabolites in rats. J. Agric. Food Chem. 21:797–803.CrossRefGoogle ScholarPubMed
5. Goring, C.A.I. 1962. Control of nitrification by 2-chloro-6-(trichloromethyl)pyridine. Soil Sci. 93:211–218.CrossRefGoogle Scholar
6. Graham-Bryce, I. J. 1967. Adsorption of disulfoton by soil. J. Sci. Food Agric. 18:72–77.CrossRefGoogle ScholarPubMed
7. Hamaker, J. W., Goring, C.A.I., and Youngson, C. R. 1966. Sorption and leaching of 4-amino-3,5,6-trichloropicolinic acid in soils. Pages 23–37 in Gould, R. F., ed. Organic Pesticides in the Environment. Adv. Chem. Ser. No. 60. Am. Chem. Soc., Washington, DC.Google Scholar
8. Hamaker, J. W. and Thompson, J. M. 1972. Adsorption. Pages 49–143 in Goring, C.A.I. and Hamaker, J. W., eds. Organic Chemicals in the Soil Environment. Marcel Dekker, Inc., New York.Google Scholar
9. Jones, D. W. and Foy, C. L. 1972. Metabolic fate of bioxone in cotton. Pestic. Biochem. Physiol. 2:8–26.Google Scholar
10. Keeley, P. E. and Thullen, R. J. 1979. Metabolic fate of methazole in purple and yellow nutsedge. Pestic. Biochem. Physiol. 10:275–286.Google Scholar
11. Koskinen, W. C. and Cheng, H. H. 1982. Elimination of aerobic degradation during characterization of pesticide adsorption-desorption in soil. Soil Sci. Soc. Am. Proc. 46:256–259.Google Scholar
12. Koskinen, W. C. and Cheng, H. H. 1983. Effects of experimental variables on 2,4,5-T adsorption-desorption in soil. J. Environ. Qual. 12:325–330.CrossRefGoogle Scholar
13. Koskinen, W. C., O'Connor, G. A., and Cheng, H. H. 1979. Characterization of hysteresis in the desorption of 2,4,5-T from soils. Soil Sci. Soc. Am. Proc. 43:871–874.Google Scholar
14. McCall, P. J., Swann, R. L., Laskowsky, D. A., Unger, S. M., Urona, S. A., and Dishburger, H. J. 1980. Estimation of chemical mobility in soil from liquid chromatography retention times. Bull. Environ. Contam. Toxicol. 24:190–195.Google Scholar
15. Rogers, R. D., McFarlane, J. C., and Cross, A. J. 1980. Adsorption and desorption of benzene in two soils and montmorillonite clay. Environ. Sci. Tech. 14:457–460.Google Scholar
16. Suzuki, T. and Casida, J. E. 1981. Metabolites of diuron, linuron, and methazole formed by liver microsomal enzymes and spinach plants. J. Agric. Food Chem. 29:1027–1033.Google Scholar
17. Swoboda, A. R. and Merkle, M. G. 1977. Movement of methazole and its degradation products in soil. J. Environ. Qual. 6:385–388.Google Scholar
18. Talbert, R. E. and Fletchall, O. H. 1965. The adsorption of some s-triazines in soils. Weeds 13:46–52.Google Scholar
19. Walker, A. 1978. The degradation of methazole in soil. I. Effects of soil type, soil temperature and soil moisture content. Pestic. Sci. 9:326–332.Google Scholar
20. Walker, A. and Roberts, M. G. 1978. The degradation of methazole in soil. II. Studies with methazole, methazole degradation products and diuron. Pestic. Sci. 9:333–341.CrossRefGoogle Scholar