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Arsenic Sorption in Phosphate-Amended Soils during Flooding and Subsequent Aeration

J.G. Reynoldsa, D.V. Naylorb and S.E. Fendorfc

a Dep. of Agronomy, Pennsylvania State Univ., University Park, PA 16802 USA
b Division of Soil Science, Univ. of Idaho, Moscow, ID 83844-2339 USA
c Geological and Environmental Sciences, Stanford Univ., Palo Alto, CA 94305 USA



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  		Fig. 1 Change in pH as a function of (a) flooding or (b) aeration time. Error bars denote one standard deviation. Santa, no P—{circ}; Santa, with P—{square}; Palouse, no P—{triangleup}; Palouse, with P—{triangledown}

 


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  		Fig. 2 Change in dissolved Fe as a function of (a) flooding time and (b) aeration time, as well as dissolved Mn as a function of (c) flooding time and (d) aeration time. Error bars denote one standard deviation. Santa, no P—{circ}; Santa, with P—{square}; Palouse, no P—{triangleup}; Palouse, with P—{triangledown}

 


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  		Fig. 3 Change in dissolved P as a function of (a) flooding time and (b) aeration time, as well as dissolved S as a function of (c) flooding time and (d) aeration time. Error bars denote one standard deviation. Santa, no P—{circ}; Santa, with P—{square}; Palouse, no P—{triangleup}; Palouse, with P—{triangledown}

 


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  		Fig. 4 Change in total dissolved As (both soils) and H3AsO3 (Santa soil) in the (a) flooded Santa soil, (b) flooded Palouse soil, (c) re-aerated Santa soil, and (d) re-aerated Palouse soil. Error bars denote one standard deviation. Total As, no P—{circ}; Total As, with P—{square}; H3AsO3, no P—{triangleup}; H3AsO3, with P—{triangledown}

 




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Copyright © 1999 by the Soil Science Society of America.