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Removal of Selenate in Simulated Agricultural Drainage Water by a Rice Straw Bioreactor Channel System

Yiqiang Zhang and William T. Frankenberger, Jr.*

Department of Environmental Sciences, University of California, Riverside, CA 92521-0424



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  		Fig. 1. Selenium removal from drainage water in a bioreactor channel system (BCS).

 


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  		Fig. 2. Total soluble Se and unprecipitated Se(0) in drainage water at different sampling sites (SSs) in Bioreactor Channel System (BCS) 1. Inserted small figures show accumulated Se(0) in each channel. Unit of Eh is mV.

 


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  		Fig. 3. Soluble Se species in drainage water at different sampling sites (SSs) in three bioreactor channel systems (BCSs).

 


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  		Fig. 4. Total soluble Se and unprecipitated Se(0) in drainage water with 60 mg L-1 of NO-3 at different sampling sites (SSs) in Bioreactor Channel System (BCS) 2. Inserted small figures show accumulated Se(0) in each channel. Unit of Eh is mV.

 


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  		Fig. 5. Total soluble Se and unprecipitated Se(0) in drainage water at different sampling sites (SSs) in Bioreactor Channel System (BCS) 3. Inserted small figures show accumulated Se(0) in each channel. Unit of Eh is mV.

 


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  		Fig. 6. Relationship between total soluble Se and Se(VI) in drainage water at different sampling sites (SSs) in three bioreactor channel systems (BCSs).

 




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