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Exchangeable Cations and Picloram Sorption by Soil and Model Adsorbents

Published online by Cambridge University Press:  12 June 2017

J. S. Arnold  and
W. J. Farmer
J. S. Arnold
Affiliation:
Dep. Soil and Environ. Sci., Univ. of California, Riverside, CA 92521
W. J. Farmer
Affiliation:
Dep. Soil and Environ. Sci., Univ. of California, Riverside, CA 92521
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Abstract

The adsorption of picloram (4-amino-3,5,6-trichloropicolinic acid) was determined on an Aiken silt loam, on three cation exchange resins and on a single anion exchange resin. Adsorption data were evaluated using parameters in the Freundlich equation and their dependance upon cationic composition of the exchange complex, the ionic composition of the equilibrium solution, and the equilibrium solution pH. For the Aiken soil saturated with metallic cations the order of decreasing picloram adsorptive capacity was Fe+3 = Cu+2 > Al+3 > Zn+2 > Ca+2 > native soil. Increases in adsorption compared to the native Aiken soil could be explained on the basis of decreases in the equilibrium solution pH except for Fe+3, Zn+2, and especially the Cu+2 treatments. The adsorptive capacity of the Aiken soil was altered by the addition of several salts simulating addition of fertilizer salts. The Cu+2 and Zn+2 salts were the only treatments showing increased adsorption which could not be explained readily by pH changes. KH2PO4 and NH2CONH2 (urea) reduced picloram adsorption. Dowex 50-1 × 4, a strongly acidic cation exchange resin, showed increased picloram adsorptive capacity in the order Cu+2 > Al+3 > Ca+2 > Zn+2 = H+. Cellex CM, a weakly acidic cellulose exchanger had increased adsorptive capacities in the order of Cu+2 > Ca+2 > Al+3 > Na+ > Fe+3 > Zn+2. Picloram adsorption by an anion exchange resin at pH 6.1 was nearly 100%. These results suggest that complex formation of picloram with polyvalent cations on the exchange complex is likely especially for Cu+2 and to a lesser extent Fe+3 and Zn+2. In soils such complex reactions would most probably involve organic matter, polyvalent cations, and picloram. The formation of chelate ring species is proposed.

Keywords

Exchange resinsmetal complexesherbicidesoil pH
Type
Research Article
Information
Weed Science , Volume 27 , Issue 3 , May 1979 , pp. 257 - 262
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

Literature Cited

1. Bailar, J. C. 1956. Chemistry of the coordination compounds. Rheinhold, New York, pp. 698–742.Google Scholar
2. Bailey, G. W. and White, J. L., 1970. Factors influencing the adsorption, desorption and movement of pesticides in soils. Residue Rev. 32:29–92.Google Scholar
3. Bailey, G. W., White, J. L., and Rothberg, T. 1968. Adsorption of organic herbicides by montmorillonite: Role of pH and chemical character of adsorbate. Soil Sci. Soc. Am. Proc. 32:222–234.CrossRefGoogle Scholar
4. Johnston, H. and Tomita, M. S. 1963. 4-amino-3,5,6-trichloropicolinic acids. Belg. Pat. 628,487 Aug. 15. Abstr. in Chem. Abstr. 61:1838.Google Scholar
5. Cotton, F. A. and Wilkinson, G. 1972. Advanced Inorganic Chemistry. A comprehensive text, 3rd Ed. Interscience Publishers, New York, 650 pp.Google Scholar
6. Ellis, B. G. and Knezek, B. D. 1972. Adsorption reactions of micro nutrients in soils. Pages 59–78 in Mortredt, J. J., ed. Micronutrients in Agirculture. Soil Sci. Soc. Am., Inc. Madison, Wisconsin.Google Scholar
7. Farmer, W. J. and Aochi, Y. 1974. Picloram sorption by soils. Soil Sci. Soc. Am. Proc. 38:418–423.Google Scholar
8. Grover, R. 1971. Adsorption of picloram by soil colloids and various other adsorbents. Weed Sci. 19:417–418.Google Scholar
9. 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. Adv. Chem. Ser. 60:23–37.Google Scholar
10. Hance, R. J. 1971. Complex formation as an adsorption mechanism for linuron and atrazine. Weed Res. 11:106–110.Google Scholar
11. Hayes, M. H. B., Stacey, M., and Thompson, J. M. 1968. Adsorption of s-triazine herbicides by soil organic matter preparations. Pages 75–90 in Isotopes and Radiation in Soil Organic-Matter Studies. International Atomic Energy Agency, Vienna.Google Scholar
12. Herr, D. E., Stroube, E. W., and Ray, D. A. 1966. The movement and persistence of picloram in soil. Weeds 14:248–256.Google Scholar
13. McCall, H. G., Bovey, R. W., McCully, M. G., and Merkle, M. G. 1972. Adsorption and desorption of picloram, trifluralin and paraquat by ionic and nonionic exchange resins. Weed Sci. 20:250–255.Google Scholar
14. Mitchell, R. L. 1965. Trace elements in soils. Pages 320–366 in Bear, F. E., ed. Chemistry of the Soil. ACS Monograph No. 160. Rheinhold Publ. Corp., New York.Google Scholar
15. Turner, M. A. and Adams, R. S. 1968. The adsorption of atrazine and atratone by anion and cation exchange resins. Soil Sci. Soc. Am. Proc. 32:62–63.Google Scholar
16. Upchurch, R. P. and Mason, D. D. 1962. The influence of soil organic matter on the phytotoxicity of herbicides. Weeds 10:9–14.Google Scholar
17. Williams, V. R. and Williams, H. B. 1967. Basic Physical Chemistry for the Life Sciences. W. H. Freeman and Co., San Francisco. 382 PP.Google Scholar
18. Youngson, C. R., Goring, C. A. I., Meikle, R. W., Scott, H. H., and Griffith, J. D. 1967. Factors affecting the decomposition of Tordon herbicides in soils. Down to Earth. 23(2):3–11.Google Scholar