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標題: 探討台灣含氯碳氫化合物污染場址之Dehalococcoides sp.族群數量及微生物菌相分析
Quantitative and Microbial Composition of Dehalococcoides sp. from Chloroethene-Contaminated Groundwater in Taiwan
作者: 張凱婷
Chang, Kai-Ting
關鍵字: 專一性引子對;Dehalococcoides sp.;即時定量聚合酶鏈鎖反應;微生物菌相;primer;Real-time PCR;species’s population
出版社: 環境工程學系所
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本研究將利用分子生物技術台灣受含氯碳氫化合物污染場址中可能存在Dehalococcoides sp.族群進行分析。先利用基因資料庫進行Dehalococcoides sp.專一性引子對設計比對,以設計出可以應用於定性分析現地整治場址之Dehalococcoides sp.微生物族群的方法。另一方面也嘗試建立適用於定量分析Dehalococcoides sp.微生物的專一性引子對。確定使用引子設計之後,使用PCR-DGGE討論Dehalococcoides sp.族群種類、以及使用Real-time PCR技術分析現地族群數量,利評估其現地降解污染物之情形。本研究並同時監測與Dehalococcoides sp.共存之其他微生物菌相分析,探討現地復育中,微生物之間交互能力、互動關係。以期望能做為快速掌握現地微生物變動,進而協助加速整治效果之依據。
本研究樣本蒐集台灣現地污染場址共14個樣本進行分析,儘管污染物質相同,因地區條件與場指環境不同,發現存在不同地點之微生物族群仍有差異。由中部地區某目前進行現地整治場址之地下水樣本中,發現現場Dehalococcoides sp.族群有strain ANAS2、strain 195、strain VS和strain MB等。而中部另一未整治現地亦存在strain 195。顯示只要有污染源、適當基質或電子接受者,該菌株可能不需經由生物復育方式,即會出現於自然地下水體。另外與脫鹵球菌共存之真細菌包括有Alcaligenes faecalis、Rubellimicrobium、Paracoccus alcaliphilus、Serratia marcescens、 Lactobacillus sp.、Lactobacillus farraginis、Olsenella sp.及Desulfovibrio sp.等。

Chlorinated solvents are widely used in dry cleaning processes, degreasing agent, semiconductor manufacture, and insecticides. Improper discharge of contaminants is likely to result in critical environmental damage. In year 2000, the Taiwanese government enforced the Soil and Groundwater Remediation Act, issuing detailed regulations on the prevention, control, and treatment of soil and groundwater. Bioremediation is commonly deemed as a cost-effective way in dealig with the issues of environmental remediation.
Molecular biology is applied in this study to analyze the Dehalococcoides sp. that exists in the chlorinated solvents found in contaminated sites. Gene database is used in the pairwise of Dehalococoides sp. primaers, which can be applied to target the Dehalococcoides sp. at a specific site. It can also be used to estimate the species’s quantity. The analytical results are further processed with the use of PCR-DGGE and Real-time PCR to obtain the data with regard to the species’s population and quantity. The species can also be used to assess the degradation of chlorinated solvents at the sites.
The study also monitored the co-culture between Dehalococcoides sp. and other microorganisms to discuss the biological interactions during the course of bioremediation. The growth of Dehalococcoides sp. serves the role of the benchmark on which the treatment is based.
Samples from fourteen sites are chosen in the study for investigation. The microorganisms species found in different sites yielded different analytical results, despite the identical contaminants. The subclasses of Dehalococcoides sp., including strain ANAS2, 195, VS, and MB, were found in some sites in the middle region of Taiwan. Among the subclasses, strain 195 was also found at another untreated site in the same area, which indicates that with the existence of contaminants, substrate, and electron acceptors, Dehalococcoides sp. is likely to survive without any bioremediation.
Other microorganisms that can coexist with Dehalococcoides sp. include Alcaligenes faecalis、Rubellimicrobium、Paracoccus alcaliphilus、Serratia marcescens、 Lactobacillus sp.、Lactobacillus farraginis、Olsenella sp.and Desulfovibrio sp..
The molecular biology methods established in the study is confirmed to be able to track down in-situ changes and enhance the effects of biological treatment.
其他識別: U0005-1706201318082400
Appears in Collections:環境工程學系所

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