Macroporous Carbon Supported Zerovalent Iron for Remediation of Trichloroethylene

Journal Article · Mon Dec 26 00:00:00 EST 2016 · ACS Sustainable Chemistry & Engineering

DOI:https://doi.org/10.1021/acssuschemeng.6b02375· OSTI ID:1355452

Lawrinenko, Michael ^[1]; Wang, Zhuangji ^[1]; Horton, Robert ^[1]; Mendivelso-Perez, Deyny ^[2]; Smith, Emily A. ^[2]; Webster, Terry E. ^[3]; Laird, David A. ^[1]; van Leeuwen, J. Hans ^[4]

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1. Iowa State Univ., Ames, IA (United States). Dept. of Agronomy
2. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Chemistry
3. Des Moines Water Works, Des Moines, IA (United States)
4. Iowa State Univ., Ames, IA (United States). Dept. of Civil, Construction & Environmental Engineering, Dept. of Ag & Biosystems Engineering, Dept. of Food Science & Human Nutrition

Groundwater contamination with chlorinated hydrocarbons has become a widespread problem that threatens water quality and human health. Permeable reactive barriers (PRBs), which employ zerovalent iron, are effective for remediation; however, a need exists to reduce the economic and environmental costs associated with constructing PRBs. Here, we present a method to produce zerovalent iron supported on macroporous carbon using only lignin and magnetite. Biochar- ZVI (BC-ZVI) produced by this method exhibits a broad pore size distribution with micrometer sized ZVI phases dispersed throughout a carbon matrix. X-ray diffraction revealed that pyrolysis at 900 °C of a 50/50 lignin$$-$$magnetite mixture resulted in almost complete reduction of magnetite to ZVI and that compression molding promotes iron reduction in pyrolysis due to mixing of starting materials. High temperature pyrolysis of lignin yields some graphite in BC-ZVI due to reduction of carbonaceous gases on iron oxides. TCE was removed from water as it passed through a column packed with BC-ZVI at flow rates representative of average and high groundwater flow. Lastly, one-dimensional convection$$-$$dispersion modeling revealed that adsorption by biochar influences TCE transport and that BC-ZVI facilitated removal of TCE from contaminated water by both adsorption and degradation.

• Research Organization: Ames Laboratory (AMES), Ames, IA (United States)
• Sponsoring Organization: National Science Foundation (NSF); USDA; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Grant/Contract Number: AC02-07CH11358
• OSTI ID: 1355452
• Report Number(s): IS-J--9301
• Journal Information: ACS Sustainable Chemistry & Engineering, Journal Name: ACS Sustainable Chemistry & Engineering Journal Issue: 2 Vol. 5; ISSN 2168-0485
• Publisher: American Chemical Society (ACS)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
Biochar
Macroporous carbon
Permeable reactive barrier
Trichloroethylene
Zerovalent iron