Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for +publisher:"Florida International University" +contributor:("William Cooper"). Showing records 1 – 2 of 2 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


Florida International University

1. Diaz, Doraida. Hydrocarbon speciation studies in ancient sediments by high temperature supercritical carbon dioxide extraction.

Degree: MS, Chemistry, 1996, Florida International University

Results on the application of high-temperature supercritical carbon dioxide extraction (HT-SFE) to the study of hydrocarbon (HC) speciation in geological samples are presented. Ancient sediments were treated by stepwise extractions, and by using a fresh sample each time. SFE temperatures ranged between 50 and 350°C. Individual analytes showed to be speciated in different ways throughout the solid matrix because different fractions are extracted under different energy conditions. Aromatic HCs appear to have a stronger association with the matrix than the aliphatics due to their higher polarity and molecular planarity. No evidence of geosynthesis of alkylaromatics during HT-SFE was obtained. Tri- and mono-aromatic steranes were totally extracted at relatively low temperatures while hopanes and steranes show a small fraction strongly interacting with the macromolecular organic structure possibly due to "trapping" processes. The release of "trapped" HCs was confirmed by the "maturity inversion" effect observed for the molecular distribution of hopanes at the highest extraction temperatures. Branched compounds like pristane and phytane showed to have a weaker association with the organic matrix if compared with straight chain analytes. Fresh sample extracted by SFE at different temperatures confirmed the results obtained for the stepwise procedure. Rock-Eva! Pyrolysis and Pyrolysis-Gas Chromatography/Mass Spectrometry (Py-GC/MS) from SFE pre-extracted sediments showed that HCs extracted at the highest temperature levels are not dominated by pyrolysis products and may have been released from trapped conditions, through irreversible thermally induced structural changes of the matrix and/or rearrangements of the macromolecular organic matter possibly via sulfur bond cleavage. No significant changes of the matrix were apparent after HT-SFE as suggested by Rock-Eval Pyrolysis and Py-GC/MS experiments, as well as from Electron Scanning Microscopy (ESM) determinations. Advisors/Committee Members: Rudolf Jaffe, Kenneth G. Furton, William Cooper, Hector R. Fuentes.

Subjects/Keywords: Chemistry

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Diaz, D. (1996). Hydrocarbon speciation studies in ancient sediments by high temperature supercritical carbon dioxide extraction. (Thesis). Florida International University. Retrieved from https://digitalcommons.fiu.edu/etd/2800 ; 10.25148/etd.FI14062271 ; FI14062271

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Diaz, Doraida. “Hydrocarbon speciation studies in ancient sediments by high temperature supercritical carbon dioxide extraction.” 1996. Thesis, Florida International University. Accessed July 10, 2020. https://digitalcommons.fiu.edu/etd/2800 ; 10.25148/etd.FI14062271 ; FI14062271.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Diaz, Doraida. “Hydrocarbon speciation studies in ancient sediments by high temperature supercritical carbon dioxide extraction.” 1996. Web. 10 Jul 2020.

Vancouver:

Diaz D. Hydrocarbon speciation studies in ancient sediments by high temperature supercritical carbon dioxide extraction. [Internet] [Thesis]. Florida International University; 1996. [cited 2020 Jul 10]. Available from: https://digitalcommons.fiu.edu/etd/2800 ; 10.25148/etd.FI14062271 ; FI14062271.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Diaz D. Hydrocarbon speciation studies in ancient sediments by high temperature supercritical carbon dioxide extraction. [Thesis]. Florida International University; 1996. Available from: https://digitalcommons.fiu.edu/etd/2800 ; 10.25148/etd.FI14062271 ; FI14062271

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Florida International University

2. Bhatt, Trupti N. Effect of gamma-irradiation on total organic carbon and trihalomethane formation potential.

Degree: MS, Environmental Engineering, 1990, Florida International University

This research was conducted to study the use of radiation in water treatment as an alternative to chlorination which has caused health concerns due to the formation of harmful disinfection by-products. Groundwater solutions from the Biscayne aquifer were radiated with Cobalt-60 gamma radiation and studied for changes in dissolved organic carbon (DOC), UV absorbance at 254 nm (UV254), fluorescence and trihalomethane formation potential (THMFP). Molecular fractionations were conducted by ultrafiltration. Effect of the combination of radiation/peroxide was studied for DOC and UV254. Radiation showed significant removal in DOC and THMFP. Similar results were seen in the fluorescence and UV absorbance experiments. Radiation/peroxide did not improve the DOC removal. Radiation of the groundwater samples broke the larger molecular weight fractions in to smaller fractions. Advisors/Committee Members: Jeffrey H. Greenfield, William Cooper, Robert J. Fennema.

Subjects/Keywords: Groundwater  – Purification; Water  – Purification  – Organic compounds removal; Civil and Environmental Engineering

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Bhatt, T. N. (1990). Effect of gamma-irradiation on total organic carbon and trihalomethane formation potential. (Thesis). Florida International University. Retrieved from https://digitalcommons.fiu.edu/etd/1648 ; 10.25148/etd.FI14051145 ; FI14051145

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Bhatt, Trupti N. “Effect of gamma-irradiation on total organic carbon and trihalomethane formation potential.” 1990. Thesis, Florida International University. Accessed July 10, 2020. https://digitalcommons.fiu.edu/etd/1648 ; 10.25148/etd.FI14051145 ; FI14051145.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Bhatt, Trupti N. “Effect of gamma-irradiation on total organic carbon and trihalomethane formation potential.” 1990. Web. 10 Jul 2020.

Vancouver:

Bhatt TN. Effect of gamma-irradiation on total organic carbon and trihalomethane formation potential. [Internet] [Thesis]. Florida International University; 1990. [cited 2020 Jul 10]. Available from: https://digitalcommons.fiu.edu/etd/1648 ; 10.25148/etd.FI14051145 ; FI14051145.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bhatt TN. Effect of gamma-irradiation on total organic carbon and trihalomethane formation potential. [Thesis]. Florida International University; 1990. Available from: https://digitalcommons.fiu.edu/etd/1648 ; 10.25148/etd.FI14051145 ; FI14051145

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.