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Published online 9 January 2007
Published in J Environ Qual 36:316-323 (2007)
DOI: 10.2134/jeq2006.0162
© 2007 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Long-Term Phosphorus Immobilization by a Drinking Water Treatment Residual

Sampson Agyin-Birikoranga, George A. O'Connora,*, Lee W. Jacobsb, Konstantinos C. Makrisc and Scott R. Brintona

a Soil and Water Sci. Dep., Univ. Florida, Gainesville, FL 32611-0510
b Dep. Crop and Soil Sci., Mich. State Univ., East Lansing, MI 48824
c Earth and Environmental Sci. Dep., Univ. Texas, San Antonio, 6900 N. Loop, San Antonio, TX 78249-0663


Figure 1
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  		Fig. 1. Effect of alum-based drinking water treatment residual (Al-WTR) amendment on water-soluble P concentrations over the sampling period in the soils of: (A) site 1 and (B) site 2. Error bars denote one standard error of the mean.

 

Figure 2
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  		Fig. 2. Effect of alum-based drinking water treatment residual (Al-WTR) amendment on oxalate-extractable Fe and Al concentrations over the sampling period in the soils of: (A) sites 1 and (B) site 2. Error bars denote one standard error of the mean.

 

Figure 3
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  		Fig. 3. Effect of alum-based drinking water treatment residual (Al-WTR) amendment on phosphorus saturation ratio (PSR) values over the sampling period in the soils of: (A) site 1 and (B) site 2. Error bars denote one standard error of the mean.

 

Figure 4
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  		Fig. 4. Relationship between runoff bioavailable phosphorus (BAP) and molar oxalate extractable Al + Fe contents of the soil samples taken from both sites in fall 2005.

 




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