NDLI: Sequencing Zerovalent Iron Treatment with Carbon Amendments to Remediate Agrichemical-Contaminated Soil

Content Provider	Springer Nature Link
Author	Boparai, Hardiljeet K. Shea, Patrick J. Comfort, Steve D. Machacek, Thomas A.
Copyright Year	2008
Abstract	Agrichemical spills and discharges to soil can cause point-source contamination of surface and ground waters. When high contaminant concentrations inhibit natural attenuation in soils, chemical treatments can be used to promote degradation and allow application of treated soils to agricultural lands. This approach was used to remediate soil containing >650 mg atrazine, >170 mg metolachlor and >18,000 mg nitrate kg$^{−1}$. Results indicated a decrease in metolachlor concentration to <1 mg kg$^{−1}$ within 95 days of chemical treatment with zerovalent iron (Fe$^{0}$, 5% w/w) and aluminum sulfate (Al$_{2}$(SO$_{4}$)$_{3}$, 2% w/w) but after one year >150 mg atrazine and >7000 mg nitrate kg$^{−1}$ remained. Laboratory experiments confirmed that subsequent additions of sucrose (table sugar) to the chemically pretreated soil promoted further reductions in atrazine and nitrate concentrations. Field-scale results showed that adding 5% (w/w) sucrose to windrowed and pretreated soil significantly reduced atrazine (<38 mg kg$^{−1}$) and nitrate (<2,100 mg kg$^{−1}$) concentrations and allowed for land application of the treated soil. These results provide evidence that zerovalent iron in combination with Al$_{2}$(SO$_{4}$)$_{3}$ and sucrose can be used for on-site, field-scale treatment of pesticide- and nitrate-contaminated soil.
Starting Page	189
Ending Page	196
Page Count	8
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	193
Issue Number	1-4
e-ISSN	15732932
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-04-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Atrazine Degradation Metolachlor Nitrate Zerovalent iron Hydrogeology Terrestrial Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Atmospheric Protection/Air Quality Control/Air Pollution Environment
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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