| 研究生: |
廖猛崴 Liao, Mong-Wei |
|---|---|
| 論文名稱: |
應用報導基因檢測法探討臺灣河川水及懸浮固體中類戴奧辛物質之分布 Application of a reporter gene assay to investigate the distribution of dioxin-like compounds in dissolved phase and suspended solids from Taiwanese rivers |
| 指導教授: |
周佩欣
Chou, Pei-Hsin |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 環境工程學系 Department of Environmental Engineering |
| 論文出版年: | 2011 |
| 畢業學年度: | 99 |
| 語文別: | 中文 |
| 論文頁數: | 120 |
| 中文關鍵詞: | 報導基因檢測法 、類戴奧辛物質 、懸浮固體物 、河川水體 |
| 外文關鍵詞: | Dioxin-like compounds, Reporter gene assay, Suspended solids, River water |
| 相關次數: | 點閱:141 下載:13 |
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本研究利用基因重組酵母菌對台灣河川中的類戴奧辛物質進行檢測,並嘗試以高效率液相層析儀將樣本複雜度降低後再作進一步分析,期望藉由此種方式找出河川中主要貢獻類戴奧辛活性的物質,並探討類戴奧辛活性較高的河川其水相與懸浮固相所含的類戴奧辛物質是否具有相關性,研究中也額外使用rec-assay針對某些特殊樣本進行基因毒性鑑定。
實驗結果顯示不論在水相或懸浮固相中,鹽水溪、阿公店溪及二仁溪流域皆具有相當高的類戴奧辛活性,其中又以二仁溪的類戴奧辛當量濃度為最高,於水相樣本中測得7.36 ± 0.70 nM β-NF-EQ,懸浮固體樣本中測得397.8 ± 38.1 μg β-NF/g SS-EQ。而水相樣本在高濃縮倍率或環境濃度10倍的情況下,大部分具有高類戴奧辛活性的樣本,均會造成菌體生長抑制。這些樣本經過液相層析儀分離之後發現極為可能是相同的生長抑制物質,隨後以rec-assay檢測發現均具有基因毒性,然而這些物質在具有高類戴奧辛活性的懸浮固體樣本中並未被發現。經由層析圖譜可知,兩相之間導致類戴奧辛活性的物質並不相同,而存在於二仁溪、鹽水溪及阿公店溪水相中導致類戴奧辛活性之物質可能源自於工業廢水。本研究中應證基因重組酵母菌能快速且有效反應河川流域中類戴奧辛活性,可做為類戴奧辛污染之快速篩檢工具。
This study used a recombinant yeast assay and high performance liquid chromatography (HPLC) fractionation process to separate and detect the dioxin-like compounds in dissolved phase and suspended solids from Taiwanese rivers. HPLC fractionation process was used to fractionate samples and further bioassay analysis was undertaken to investigate the dioxin-like activity of fractions. The aims of this study were to isolate the major compounds that contributed to high dioxin-like activity, and to further investigate the distribution of dioxin-like compounds in dissolved phase and suspended solids. Additionally, genotoxicity of some specific fractions was also evaluated using the rec assay.
For most of the tested samples, higher dioxin-like activity was detected in Erren, Agongdian, and Yanshuei rivers. The highest equivalent concentration of dioxin-like compounds was 7.36 ± 0.70 nM β-NF-EQ in dissolved phase and 397.8 ± 38.1 μg β-NF/g SS-EQ in suspended solids at Erren river basin. According to bioassay results and HPLC chromatograms, similar substances which caused dioxin-like activity and yeast growth inhibition may exist in 21min fractions of Erren, Agongdian and Yanshuei rivers, while the composition of dioxin-like compounds were different in dissolved phase and suspended solids. Genotoxic effect was also detected in the fraction of these samples, suggesting that the compounds inducing dioxin-like activity may also cause genotoxicity. The compounds which caused dioxin-like activity from Erren, Yanshuei, and Agongdian probably derived from industrial wastewater. The recombinant yeast assay described in this study can be useful to rapidly and efficiently evaluate dioxin-like activity for screening river basin pollution.
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