Field Study of Enhanced TCE Reductive Dechlorination by a Full-Scale Whey PRB
Semkiw, ES; Barcelona, MJ
HERO ID
1968774
Reference Type
Journal Article
Year
2011
Language
English
| HERO ID | 1968774 |
|---|---|
| In Press | No |
| Year | 2011 |
| Title | Field Study of Enhanced TCE Reductive Dechlorination by a Full-Scale Whey PRB |
| Authors | Semkiw, ES; Barcelona, MJ |
| Journal | Ground Water Monitoring and Remediation |
| Volume | 31 |
| Issue | 1 |
| Page Numbers | 68-78 |
| Abstract | This study evaluates the efficiency of a full-scale, 81 m-wide permeable reactive barrier (PRB) configured by injection of dairy whey in the downgradient region of a contaminant source zone to enhance the in situ biodegradation of high concentrations (102 to 103 mu g/L) of chlorinated ethenes (CEs). Ten biannual whey injections were completed in a 3.5-year pilot phase and 1.5-year operational phase. Improved and sustained dechlorination was observed at extraction/injection and downgradient wells in the fully-operational phase, when dried whey masses were increased from 13.6 kg to 230-360 kg, whey slurry volumes were increased from 2300 L to 307,000-480,000 L, and extraction/injection well loops were employed for the application of whey. At extraction/injection wells, CEs decreased to low ( less than or equal to 10 mu g/L) or undetectable levels. At downgradient wells, average trichloroethene concentrations decreased, by as much as 100% (from less than or equal to 384.2 during the pilot phase to less than or equal to 102.6 mu g/L during the operational phase), while average cis-dichloroethene concentrations decreased by as much as 57.5% (from less than or equal to 6466.1 to less than or equal to 4912.2 mu g/L). Downgradient vinyl chloride averages either increased by as much as 63.8% (from less than or equal to 859.6 to less than or equal to 1407.9 mu g/L) or decreased by 64.0% (from 1375.4 to 880 mu g/L). Downgradient ethene + ethane averages increased by as much as 73.2% (from less than or equal to 1145.3 to less than or equal to 1347.1 mu g/L). On the basis of the 2008 average market price, the estimated material cost of whey is $1.96/kg organic carbon or, for the configuration of an 81 m PRB by biannual application of 300 kg whey, $325/year. Carbon substrate cost comparisons and implications for efficient in situ treatment design are discussed. |
| Doi | 10.1111/j.1745-6592.2010.01321.x |
| Wosid | WOS:000287487000006 |
| Url | https://search.proquest.com/docview/1490507948?accountid=171501 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | Bioremediation; Pollution monitoring; Chlorides; Trichloroethylene; Dechlorination; Organic carbon; Costs; Ethene; Remediation; Ethane; Pricing; Slurries; Barriers; Carbon; Injection; Injection Wells; Groundwater |