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Articles 1 - 4 of 4
Full-Text Articles in Physical Sciences and Mathematics
Organic Waste Compounds In Butte Area Surface Waters, Deliliah Friedlander
Organic Waste Compounds In Butte Area Surface Waters, Deliliah Friedlander
Graduate Theses & Non-Theses
As human dependence on pharmaceuticals and household products containing a broad variety of organic compounds increases, so does the discharge of residual components of these compounds into surface and groundwaters. Organic wastewater chemicals (OWCs) result when human or animal discharge appears in the environment through a variety of waste disposal mechanisms. Historically environmental standards for organic wastewater chemicals have not been a concern when compared to biological hazards, metal contamination, acid/base hazards and radioactive hazards. At present, the U.S. Environmental Protection Agency (EPA) does not have standards for organic wastewater chemicals for surface waters; it is imperative that research be …
Chemical Speciation In Silver Bow And Blacktail Creeks: Implications For Bioavailability And Restoration, Johnathan Feldman
Chemical Speciation In Silver Bow And Blacktail Creeks: Implications For Bioavailability And Restoration, Johnathan Feldman
Graduate Theses & Non-Theses
Silver Bow and Blacktail Creeks, contaminated with toxic elements from mining, present a need for remediation and restoration. Trace elements are present in elevated concentrations, particularly copper. Determining element speciation will allow informed consideration of effective restoration strategies, by providing a foundation for assessing bioavailability and toxicity. The three goals are: determine how speciation varies between seasons and sites in four impacted sites from the greater Butte Area One, an impacted downstream site known as Santa, and a control site on Upper Blacktail Creek known as Blacktail; how these variations influence bioavailability and toxicity; and what causes these variations. Total …
Growth, Lipid Production And Biodiesel Potential Of Chromulina Freiburgensis Dofl., An Acidophilic Chrysophyte Isolated From Berkeley Pit Lake, June E. Mohler Mitman
Growth, Lipid Production And Biodiesel Potential Of Chromulina Freiburgensis Dofl., An Acidophilic Chrysophyte Isolated From Berkeley Pit Lake, June E. Mohler Mitman
Graduate Theses & Non-Theses
Microalgae remain a promising, but underdeveloped source of lipids for sustainable biodiesel. Some of the obstacles to cost-effective commercial-scale production have been culture contamination and expensive harvest methods. A chrysophyte isolated from Berkeley Pit Lake and identified as Chromulina freiburgensis, was found to grow rapidly in a pH 2.5 liquid medium and to amass numerous intracellular lipid bodies. This research addresses the scarcity of published knowledge on the topic of chrysophyte species as potential lipid sources for biodiesel. It investigates how growth phase, culture conditions, and harvest timing influence the quantity and composition of lipids produced by this alga. …
Technical Feasibility Of Selectively Separating Rare Earth Elements By Vapor Phase Extraction And Condensation, Katie Lyons
Technical Feasibility Of Selectively Separating Rare Earth Elements By Vapor Phase Extraction And Condensation, Katie Lyons
Graduate Theses & Non-Theses
Experiments were performed to evaluate the technical feasibility of selectively separating selected rare earth halides (bromides and chlorides) using a volatilization and condensation technique. Initially, optimum chloridizing and bromidizing roast parameters were secured in studies performed on reagent grade rare earth oxide samples and subsequently confirmed in tests performed on mineral ore and concentrate samples. The volatilization and condensation experiments were performed by placing the subject rare earth halide samples in an argon-purged multiple-zone tube furnace wherein the temperature profile was controlled to establish separate vaporization and condensation regions. Following each experiment, condensate and solid residue samples were analyzed to …