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By Donald L. Sparks, D. L. Suarez

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Additional info for Rates of Soil Chemical Processes: Proceedings of a Symposium Sponsored by Divisions S-1, S-2, S-3, and S-9 of the Soil Science Society of America in (S S S a Special Publication)

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2-1O. Column method with feedback control experimental setup (adapted from Van Riemsdijk and Van del' Linden. 1984). MV l • MV2 • and MV 3 are the multiposition valves that allow up to eight columns to be run. A diagram of the chemical part of the apparatus developed by Van Ricrnsdijk and Van der Linden (1984) is shown in Fig. 2-10. Eight soil columns are connected to eight vessels (only one of each is shown in the diagram). Solution is pumped from a vessel through a column and back into the vessel.

Sci. ' 1:1-29. , and Y. Suzin. 1982a. Application of the Elovich equation to the kinetics of occlusion, homogeneous microporosity. J. Chern. Soc. Faraday Trans. 1. 78:2313-2320. , and Y. Suzin. 1982b. Application of the Elovich equation to the kinetics of occlusion, heterogeneous microporosity. J. Chern. Soc. Faraday Trans. 1. 78:2329-2336. , B. Fubini, and E. Giamello. 1989. Effect of micropore filling on chemisorption by large surface area materials. Adsorp. Sci. & Techno!. 5:297-306. , A. Nir, N.

Sci. & Techno!. 5:297-306. , A. Nir, N. Lotan, and C. Aharoni. 1984. Surface diffusion as a rate determining step in activated chemisorption. Can. J. Chern. Eng. 62:233-240. G. 1974. Rate of phosphorus sorption by five Oklahoma soils. Soil Sci. Soc. Am. Proc. 38:404-407. G. Lotse. 1974. Kinetics of phosphate adsorption and desorption by lake sediments. Soil Sci. Soc. Am. Proc. 38:50-54. Z. Keramidas, and A. Pavlatou. 1986. On the limitations of the simplified Elovich equation in describing the kinetics of phosphate sorption and release from soils.

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