Toxicity of oiled wetland sediments influenced by natural and enhanced bioremediation /
A multi-phase bioremediation project was initiated raphics.
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | A multi-phase bioremediation project was initiated raphics. alternate electron acceptor. The effects of treatments amendments to evaluate their effects on amphipod and P450 RGS assays were sensitive to amphipod, cytochrome P450 Reporter Gene System (RGS), analyses of sediment elutriates revealed that Microtox and decreased significantly over time. However, a and its associated wetlands were set aside for application of weathered oil and selected nutrient associated with intrinsic petroleum degradation. Acute bioremediation. The amendments evaluated were chl.omol3adTM and Salmonella assays were not sensitive conclusion, significant toxicity was detected in oiled consistently alter sediment-associated toxicity with December of 1994 and monitored sediment toxicity during extensive flooding of the San Jacinto River elevated near the mouth of the cove and decreased to experimental conditions. following the rupture of several oil and gas pipelines hydrocarbon (TPH), and gas chromatography-mass identified between Microtox and GC-MS target analyse inorganic nutrients and inorganic nutrients plus an levels in total sediment extractions. Subsequent GC-MS mortality was initially high for all oiled sediments naphthalenes, phenanthrenes and dibenzothiophenes. In near Houston, Texas, in October of 1994. A small cove non-detectable levels within 4 months. Acute toxicity on sediment toxicity and mutagenicity were assessed petroleum bioremediation studies. Phase I began in Phase 11 began in March 1996 with the controlled plots receiving nutrient amendments after 140 days, plots that were oiled followed by a rapid decrease possibly due to elevated ammonia levels. The Toxi- Salmonella assays were not sensitive under the sediment elutriates from 21 plots around the study sediments that decreased to near background levels significant increase in mortality was observed in Significant toxicity was detected (Microtox*) in all site over a period of 7 months. Sediment toxicity was spectrometry (GC-MS) target saturate concentrations. that was correlated to petroleum losses. Amphipod the exception of the amphipod assay. The Microtox, to petroleum addition. Significant correlations were Toxi-ChromoPad and Salmonella/microsome assays. toxicity was evaluated using the Microtox 100% Test on toxicity was strongly correlated with fluorenes, using Microtox 100% and Solid-phase Tests and was correlated with sediment total petroleum weathered oil. However, the Toxi-ChromoPad and within months. The addition of treatments did not |
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| Item Description: | "Major subject: Civil Engineering". Vita. |
| Physical Description: | x, 107 leaves : illustrations ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references (leaves 78-87). |