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請使用永久網址來引用或連結此文件:
https://ir.cnu.edu.tw/handle/310902800/27666
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| 標題: | Reductive Dechlorination of 2,3,4-Chlorobiphenyl by Biostimulation and Bioaugmentation |
| 作者: | Sudjarid, Wichidtra
Chen, I-Ming
Monkong, Wachiraporn
Anotai, Jin |
| 貢獻者: | 環境資源管理系 |
| 關鍵字: | Pcbs
Sediment
Slurry
Bioremediation |
| 日期: | 2012-04 |
| 上傳時間: | 2014-03-21 16:16:59 (UTC+8) |
| 出版者: | Mary Ann Liebert Inc |
| 摘要: | Dechlorination ability of indigenous microorganisms from seven stream sediments collected around Bangkok and its vicinity in Thailand was tested by amended with seven polychlorinated biphenyl congeners (PCBs) including 2,3,4-chlorobiphenyl (234-CBp), 22'5-CBp, 24'5-CBp, 22'35'-CBp, 22'45-CBp, 23'44'5-CBp, and 22'34'5'6-CBp. After 2-22 weeks of incubation, 234-CBp dechlorination could be initiated and dechlorinated to 24-CBp in all seven sediment slurry without any further enrichment, with dechlorination completed within 28 weeks. This is the first evidence indicating that 234-CBp dechlorination consortium actually existed in the natural streams of Thailand and could perform the 234-CBp dechlorination in the fresh sediment slurry without any nutrient amendment. The lag phase of 234-CBp was shortest in the sediment slurry collected and prepared from the Hua Lum Poo Canal (HLP), which was sporadically contaminated with hexachlorobenzene. In biostimulation experiments, HLP nutrient-strengthened sediment slurry was amended by yeast extract, mineral nutrients, acetate, lactate, and pyruvate, but no significant enhancement was found for 234-CBp dechlorination. It implied that the present substrates and nutrients at this site were sufficient to sustain the activity of 234-CBp dechlorination consortium. In bioaugmentation experiments, sediment slurry from HLP that possessed higher dechlorination potential was introduced to another five less effective sediment slurries for 234-CBp dechlorination tests. Results indicated a significant acceleration to those important slurries, and revealed a promising application for the in-situ remediation of PCB contamination in Thailand that might be expanded to worldwide application. |
| 關聯: | Environmental Engineering Science, 29(4), 255-261 |
| 顯示於類別: | [環境資源管理系(所)] 期刊論文
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