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Use of Diammonium Phosphate to Reduce Heavy Metal Solubility and Transport in Smelter-Contaminated Soil

S.L. McGowena, N.T. Bastaa and G.O. Brownb

a Dep. of Plant and Soil Sciences, Oklahoma State Univ., Stillwater, OK 74078
b Biosystems and Agricultural Engineering, Oklahoma State Univ., Stillwater, OK 74078



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  		Fig. 1. Elution curves for Cd, Pb, Zn, and P for untreated and diammonium phosphate (DAP)-amended soils. Symbols represent observed elution data and lines represent model-fitted elution curves

 


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  		Fig. 2. Observed (symbol) and fitted (line) bromide breakthrough curves

 


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  		Fig. 3. Cadmium activity-ratio diagram with soil solution speciation data. CdCO3 line assumes CO2 = 10-3.5 M

 


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  		Fig. 4. Lead activity-ratio diagram with soil solution speciation data. Plotted lines assume Cl = 10-4 M, SO4 = 10-1.3 M, and CO2 = 10-3.5 M

 


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  		Fig. 5. Zinc activity-ratio diagram with soil solution speciation data. Assumes amorphous Fe(OH)3 controls Fe solubility, CO2 = 10-3.5 M, and pH = 7

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
Copyright © 2001 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.