碩士 / 國立海洋大學 / 海洋生物研究所 / 86 / DDT(1.1.1-trichloro-2,2-bis(p-chloroenyl)ethane was widely used
aspesticides disease control .Because of its numerous
applications,DDThas a world wide distribution.The misuse,
accidental spillage,and improperdisposal of this compound have
resulted in extensive pollution of ecosystem . DDT is a
hydrophobic and lipophilic compound that easilyaccumulate in
sediment ,or enter food chain,thus harmful to human healthor
ecosystem.Since most of the DDT contaminated sediment or soil
are in an anaerobic condition,the study of the fate and removal
of DDT in anaerobicenvironment is very important. In the
present study I investigated the potential for anaerobic
biodegradation of DDT and its derivatives in anoxic sediment
slurries collected from the Keelong and Erh-Jen RiverThe effect
of initial oncentration ,physiologcal inhibitors,and pH on the
dechlorination of DDT in the sedimentslrries collected from the
Keelong River were also investigated.Effect of different
concentration of DDTmetablic inhibitors,pH on the degradation
rate of DDT in Keelong Riversediment slurring . GC/ECD was used
for the analysis of DDT,DDD and DDE.GC/MS was used for
determination of the intermediate products . The relative
transformation rates of the two isomers of DDT in sediment
slurriesfrom the Keeling River and the Erh-Jen River were
2,4'-DDT>4,4'-DDT.Allisomersof DDT were dechlorinate to
1,1-dichloro-2,2-bis(p-chlorophenyl)ethane(DDD)and then
transformed to 1,1-chloro-2,2-bis(p-chlorophenyl)ethylene(DDMU)
and dichlorobenzophenone(DBP).The relative transformation rates
of DDT,DDD and DDE were DDT>DDD>DDE.Readdition of DDT to the
sediment slurriesafter removal of DDT ,enhanced the
dechlorimation rates of DDT.TheDDT-adapted sediment slurries
collected from the Erh-Jen River slightly enhanced the
dechlorimation rates of DDT. The optimenm pH for DDT
dechlorimation in the sedimen slurriescollectet from the Keelong
was 6.7.
| Identifer | oai:union.ndltd.org:TW/086NTOU1270005 |
| Date | January 1998 |
| Creators | HAUNG, HUI-JUNG, 黃輝榮 |
| Contributors | Hwang Jiang-Shiou, 劉秀美 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 1 |
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