Hostname: page-component-848d4c4894-wzw2p Total loading time: 0 Render date: 2024-05-08T21:37:57.949Z Has data issue: false hasContentIssue false
  • English
  • Français

Chlorsulfuron Dissociation and Adsorption on Selected Adsorbents and Soils

Published online by Cambridge University Press:  12 June 2017

Patrick J. Shea
Patrick J. Shea*
Affiliation:
Dep. Agron., Univ. Nebraska, Lincoln, NE 68583
Get access Rights & Permissions [Opens in a new window]

Abstract

The dissociation constant for chlorsulfuron {2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino] carbonyl] benzenesulfonamide} in aqueous solution measured by spectrophotometric titration is 3.58 ± 0.05. Chlorsulfuron was more strongly adsorbed on IRA-400-Cl strong anion exchange resin than on IR-4B-OH weak anion exchange resin or Al2O3 anionotropic adsorbent. Hydrogen bonding was probably responsible for the adsorption observed on IR-120-Na(H) cation exchange resin. No chlorsulfuron was adsorbed on Al2O3 cationotropic absorbent, technical montmorillonite, illite, or kaolinite. Adsorption did occur on organic matter derived from a histosol. Chlorsulfuron was strongly adsorbed on activated charcoal but had little affinity for α-cellulose. Adsorption onto hydrophobic polymeric XAD-2 adsorbent at pH 5.2 was not significant for chlorsulfuron concentrations below 30 μM. No significant adsorption occurred on a variety of mineral soils low in organic matter. Adsorption on a Sharpsburg silty clay loam was inversely related to solution pH. Hydrogen bonding and charge transfer bonds were postulated as the major mechanisms responsible for chlorsulfuron adsorption in soil.

Keywords

pKAionizationspectrophotometrysulfonylurea
Type
Soil, Air, and Water
Information
Weed Science , Volume 34 , Issue 3 , May 1986 , pp. 474 - 478
Copyright
Copyright © 1986 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Albert, A. and Serjeant, E. P. 1984. The determination of ionization constants; A laboratory manual. 3d ed. Pages 76–101.Google Scholar
2. Best, J. A., Weber, J. B., and Weed, S. B. 1972. Competitive adsorption of diquat2+, paraquat2+, and Ca2+ on organic matter and exchange resins. Soil Sci. 114:444–450.Google Scholar
3. Broadbent, F. E. 1965. Organic matter. Pages 1397–1400 in Part 2, Black, C. A., ed. Methods of Soil Analysis. Am. Soc. Agron., Inc., Madison, WI.Google Scholar
4. Giles, C. H., MacEwan, T. H., Nakhwa, S. N., and Smith, O. 1960. Studies in adsorption. Part XI. A system of classification of solution adsorption isotherms, and its use in diagnosis of adsorption mechanisms and in measurement of specific surface areas of solids. J. Chem. Soc. 1960:3973–3993.Google Scholar
5. Lehninger, A. L. 1975. Biochemistry. 2d ed. Worth Pub. Inc., New York, NY. Page 267.Google Scholar
6. Palm, H. L., Riggleman, J. D., and Allison, D. A. 1980. Worldwide review of the new cereal herbicide–DPX-4189. Proc. 1980 Br. Crop Prot. Conf.–Weeds. 2:1–6.Google Scholar
7. Walker, A. and Brown, P. A. 1983. Measurement and prediction of chlorsulfuron persistence in soil. Bull. Environ. Contam. Toxicol. 30:365–372.Google Scholar
8. Weber, J. B. 1977. Spectrophotometric analysis of herbicides. Pages 109–117 in Truelove, B., ed. Research Methods in Weed Science. 2d ed. South. Weed Sci. Soc., Auburn Printing, Inc., Auburn, AL.Google Scholar
9. Weed Science Society of America. 1983. Herbicide Handbook. 5th ed. Weed Sci. Soc. Am., Champaign, IL. Page 108.Google Scholar
10. Zahnow, E. W. 1982. Analysis of chlorsulfuron in soil by liquid chromatography. J. Agric. Food Chem. 30:854–857.Google Scholar