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Field-Scale Remediation of a Metolachlor-Contaminated Spill Site Using Zerovalent Iron

S. D. Comfort*, P. J. Shea, T. A. Machacek, H. Gaber and B.-T. Oh

School of Natural Resource Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583-0915



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Fig. 1. Soil mixer and water tank being pulled through a soil windrow.

 


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Fig. 2. Changes in metolachlor concentration, 14C activity, and production of Cl- and dechlorinated metolachlor following addition of Fe0 or Fe0 + Al2(SO4)3 to aqueous solutions containing 1.09 mM metolachlor spiked with 14C-metolachlor.

 


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Fig. 3. Changes in metolachlor concentration, 14C activity, and production of dechlorinated metolachlor following addition of Fe0 or Fe0 + acetic acid to aqueous solutions containing 1.00 mM metolachlor spiked with 14C-metolachlor.

 


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Fig. 4. Cumulative 14CO2 evolved (percent of added 14C) from inoculated solution media containing 14C-labeled metolachlor or Fe0–treated 14C-labeled metolachlor as the sole C source.

 


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Fig. 5. Effects of Al2(SO4)3 and acetic acid on metolachlor destruction in static soil microcosms treated with 5% (w/w) Fe0.

 





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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
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Vadose Zone Journal
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