Organotins in Benthic Organisms in Chi-Jing Costal Areas of Kaohsiung
| Autor: | Yu-chung Chu, 朱育樟 |
|---|---|
| Rok vydání: | 2009 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 97 Kaohsiung Harbor used to be the third largest harbor of the world, and also the biggest one in Taiwan at present. Even though it’s not in the list of ten biggest harbors now, a lot of ship around the world comes frequently. There are also several shipyards and fishing ports in the area of Kaohsiung Harbor, it’s horrible that the harbor area is polluted by organotin compound pollutant.. Following are five major benthic organisms: Distorsio reticularis, Niotha conoidalis, Metapenaeopsis palmensis, Portunus argentatus and Portunus hastatoides.. Monobutyltin(MBT) is almost detected in the sediment of all the stations, and the concentration is between 5.4 and 17.9 ng /g wet wt as tin. Dibutyltin(DBT) is detected in the sediment of all the station, and the concentration is between 9.5 and 12.5 ng /g wet wt as tin. Tributyltin (TBT) is just detected at station D2 with the concentration of 8.7 ng /g wet wt as tin. The organotin in Distorsio reticularis, Niotha conoidalis, Metapenaeopsis palmensis, Portunus argentatus and Portunus hastatoides are obviously accumulated. In Distorsio reticularis, the concentration of TBT is between ND and 112.6 ng /g wet wt as tin. In Niotha conoidalis, the concentration of TBT is between 12.4 and 217.7 ng /g wet wt as tin, in Portunus argentatus, is between 3.0 and 3.4 and inPortunus hastatoides is between 5.5 and 92.1, in Metapenaeopsis palmensis, is between 3.7 and 37.0. In all station, monobutyltin is the main composition of butyltins; TBT concentration is almost less than 100 ng /g wet wt as tin. The concentration of butyltins in all the five major benthic organisms decreases with the increasing sample size. There wasn’t significant variation for organotin concentrations in Metapenaeopsis palmensis collected from each stationsand seasons. The concentration of Portunus argentatus and Portunus hastatoides is higher in April 2008 and January 2008 than in other months. According to many study, the content of organotins in sediment around coastal areas out of harbor is obviously less than other coastal areas of large-scale harbors (Lisbon, Sines, Sagres, Huelva, Cadiz and Trafalgar). The organotin contamination around coastal areas out of harbor is not serious. Base on estimation of amounts, distributions and contents of organotin in organisms, Portunus argentatus and Portunus hastatoides are better bethic organisms than Distorsio reticularis, Niotha conoidalis, and Metapenaeopsis palmensis in all the depth and area. The amount is also huge that Portunus argentatus and Portunus hastatoides are the best indicator organism for this area. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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