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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Phytoremediation of 2,4,6-trinitrotoluene in contaminated wastewater-effects of soil and iron on remediation

McDonough, Kathleen M. 05 1900 (has links)
No description available.
42

Characterization of pyrene degradation by Mycobacterium sp. strain S65

Sho, Michiei, 1976- January 2002 (has links)
The microbial degradation of pyrene, a 4-ring polycyclic aromatic hydrocarbon (PAH), has been elucidated with the increasing number of pyrene-degrading bacteria that have been isolated in recent years. A pyrene degrading bacterium identified as Mycobacterium sp. strain S65, was isolated from a jet-fuel contaminated site in Sept-Iles, northern Quebec, Canada. S65 utilized pyrene, phenanthrene, and fluoranthene as sole carbon and energy sources, but did not degrade naphthalene, anthracene, and fluorene. Pyrene mineralization was enhanced by adding benz[a]anthracene, benzy[a]pyrene, or phenanthrene as cosubstrates. When added to PAH contaminated soil as a potential bioaugmentation agent, S65 did not appear to survive well, nor was it effective at degrading PAHs under these conditions. / Pyrene catabolic genes in S65 were partially characterized by Southern hybridization using a probe constructed from the naphthalene inducible pyrene dioxygenase gene, nidA, from the pyrene-degrading bacterium, Mycobacterium sp. strain PYR-1.
43

Phytoremediation of soils contaminated by used motor oil

Dominguez, Elena January 2002 (has links)
There is no abstract available for this thesis. / Department of Natural Resources and Environmental Management
44

Impact of tropical plants on microbial activity and diversity in soil contaminated with petroleum hydrocarbons

Shibata, Alexandra Ku January 2006 (has links)
Thesis (M.S.)--University of Hawaii at Manoa, 2006. / Includes bibliographical references (leaves 138-163). / xii, 163 leaves, bound ill. 29 cm
45

Effect of bioaugmentation and diesel fuel type on soil bioremediation

Chua-Chiaco, Barrie Wu 08 1900 (has links)
The enhancement of bioremediation by bioaugmentation in soil contaminated with diesel fuel No. 2 and No. 6 (Bunker C) is uncertain. A clayey soil was contaminated with 6,000 mg of either diesel fuel per kg of soil and seeded (5 x 10-7 cells/g of soil) with a Hawaii soil bacterium (UH138) known to utilize several hydrocarbons. The soil was limed, fertilized, and incubated in jars at 30°C for several months. The concentrations of total petroleum hydrocarbons (TPH) and of polycyclic aromatic hydrocarbons (PAH) in soil were measured by gravimetry and immunoassay, respectively. Poisoned controls (0.6% HgCl2) were used to determine the extent of hydrocarbon degradation due to microbial activity. A rapid first order biodegradation of TPH (84% in 23 days) occurred in soil contaminated with diesel fuel No. 2, regardless of bacterial seeding. Biodegradation of PAH was linear and reached 84% by day 98 in both seeded and unseeded treatments. Bioaugmentation had no effect on bioremediation of diesel fuel No.2. The decrease in TPH and PAH was paralleled by an increase in populations of total bacteria, phenanthrene-degrading bacteria and microorganisms capable of utilizing hexadecane and diesel fuel No. 2 as well as by an enhancement in CO2 evolution by the soil. Indigenous Zygomycetes grew profusely in diesel fuel No. 2 contaminated soil. Cunninghamella echinulata var. echinulata was isolated from the soil and was shown to be able to utilize several hydrocarbons. Thus, Zygomycetes may have contributed to the rapid decrease in contaminant. In soil contaminated with diesel fuel No. 6, the measurements of TPH and PAH were more variable due to the uneven distribution of the product. No biodegradation of the contaminant occurred over a period of 138 days. The growth of Zygomycetes was scant. The counts of total bacteria remained unchanged after the addition of diesel fuel No. 6. However, counts of the indigenous phenanthrene-degrading bacteria increases dramatically ( 4 log units) during the first 54 days whereas the level of the seeded bacteria remained stable. The counts of mineral oil degraders decrease by 2 log units after day 2. Co2 evolution from the soil confirmed that diesel fuel No. 6 was not degraded by either the indigenous microflora or the seeded bacterium. Thus, diesel fuel No. 2 was highly degradable by the indigenous population, however, diesel fuel No. 6 was recalcitrant. / Thesis (M.S.)--University of Hawaii at Manoa, 1998. / Includes bibliographical references (leaves 106-117). / Available also on microfiche. / Department of the Interior; U.S Geological Survey via Water Resources Research Center
46

Phytoremediation of weathered petroleum in groundwater by Arroyo Willows in nutrient amended on-site mesocosms : a master's thesis /

Bragg-Flavan, Sarah, Nelson, Yarrow Michael, January 1900 (has links)
Thesis (M.S.)--California Polytechnic State University, 2009. / Mode of access: Internet. Title from PDF title page, viewed on March 30, 2009. Major professor: Yarrow Nelson, Ph.D. "Presented to the Electrical Engineering Department Faculty of California Polytechnic State University, San Luis Obispo." "In partial fulfillment of the requirements for the degree of Master of Science in Civil and Environmental Engineering." "March 2009." Includes bibliographical references (p. 133-140). Will also be available on microfiche.
47

Cost-benefit analysis of remediation methods for the Fairfax, Virginia Texaco terminal oil plume /

Klemmer, Katherine Alyn, January 1994 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references. Also available via the Internet.
48

Parameter-based models estimating microbial hydrocarbon-degrading activity in a diesel-contaminated soil

Fallgren, Paul Harold. January 2007 (has links)
Thesis (M.S.)--University of Wyoming, 2007. / Title from PDF title page (viewed on Nov. 3, 2008). Includes bibliographical references (p. 49-55).
49

Fungal generation of organic acids for removal of lead from contaminated soils /

Ousmanova, Diliara. January 1900 (has links)
Thesis (M.App.Sc.) - Carleton University, 2005. / Includes bibliographical references (p. 218-225). Also available in electronic format on the Internet.
50

High valent uranium dioxo and imido complexes synthesis and structure /

Vaughn, Anthony E., January 2008 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2008. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed June 17, 2009). Vita. Includes bibliographical references.

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