IEC 132 |
| Jiasheng Cao and Weixian Zhang. Department of Civil and Environmental Engineering, Lehigh University, Fritz Lab, Bethlehem, PA 18015 |
| Feasibility of nanoscale iron particles for remediation of chromium-contaminated groundwater and soil is evaluated. Laboratory batch tests were conducted on contaminated groundwater and soil samples to determine the rate and extent of hexavalent chromium [Cr(VI)] reduction and immobilization using nanoscale iron particles (~60 nm). Groundwater ([Cr(VI)]=42.83±0.52 mg/L, pH 11.0 0.5) and soil samples ([Cr(VI)]=3,380±90 mg/kg) were collected from an industrial site in New Jersey. Cr(VI) in the water and soil samples was quickly reduced and precipitated out of the aqueous solution by the nanoparticles. The reaction rate constant of Cr(VI) reduction by nanoscale iron particles was 0.157±0.018 mgm-2min-1, about 25 times greater than that by iron filings (100 mesh). One gram of nanoparticles can reduce 84.4-109.3 mg Cr(VI) in the groundwater and 69.28-72.65 mg Cr(VI) in soil/groundwater slurries. This reduction capacity was 50-70 times greater than that of iron filings under the same experimental conditions. |
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Nanotechnology and the Environment
5:00 PM-7:00 PM, Tuesday, March 25, 2003 Convention Center -- Hall G, Poster
Division of Industrial and Engineering Chemistry |