碩士 / 國立高雄海洋科技大學 / 海洋環境工程研究所 / 96 / The Capitella sp. is the advantage kind in the contaminated zone,it can live under lower condition of dissolving oxygen,so researchers often regard Capitella sp. as the index living beings that organic matter polluted.
Organotin compounds is used in plastic products and ship painting to resist the biological coating of the outer cover extensively, its pollutant is discharged in the environment.The half-life of organotin can be longer more than 10 years in the sediment to cause danger to the human health and ecology. This research will go on in the sediment at 1 μg/g concentration of TBT, utilizing Capitella sp. the ability of accumulate organic matter, to analysed that TBT content and the bioaccumulation quantity of TBT in the sediment. Our laboratory finding the TBT accumulating amount (93.6～97.2μg/g ) internal the C. sp. is higher than that the TBT concentration being examined in the documents of the marine organisms.The product of DBT and MBT which being degraded from the TBT in the C. sp. Body was found. Prove the C. sp. is able to bear toxicity highing and survive in the environment of containing the organotin compounds, and have ability of degrading to make TBT toxicity lower.This research will utilize the biodegradation characteristic of C. sp. to probe into the metabolism ability of C. sp. under the long time scale.
Learn from experiment of degrading TBT ,the degradation rate of sediment experiment group that join the C. sp. is better than sediment experiment group that not join the C. sp. and sterilization sediment experiment group. In the move active district (Surface layer 1～3 centimeters) place of C. sp., the greatest degradation rate of TBT is 65.33% in 15 days, the average degradation rate of TBT is 52.72% in 15 days.The unit dry weight of C. sp. included TBT weight maximum is 95549.20 ng/g, it is 699 times compared with the greatest difference with contrast group,the bioconcentration factor（BCF）of C. sp. maximum is 95.40.
This result of study proves C. sp. can be effective to degrade organotin compounds with higher toxicity into organotin compounds with lower toxicity,it different to degradation of organotin compounds in sediment by way of bacterium function in past reference. But in the course of this research,is not understand the degradation mechanism to organotin compounds of C. sp.and bacterium.In the future,can be towards to studing the degradation mechanism to organotin compounds of C. sp.and bacterium separately.
| Identifer | oai:union.ndltd.org:TW/096NKIM8282005 |
| Date | January 2008 |
| Creators | HO TSUNG NAN, 何宗南 |
| Contributors | 吳秀賢 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 120 |
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