Year: 2019, 2019
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Elemental selenium has been extensively quantitatively measured in sediments; however, its physical composition is largely unknown, despite it being the dominant selenium species in some reducing environments. Here, for the first time, it is shown that small, cyclic selenium compounds can account for a quantitatively-relevant fraction of the total elemental selenium present. </p>… more Full Text: Characterization of Synthetic and Natural Se8 and Related SenSm Compounds by Gas Chromatography-Mass Spectrometry A thesis submitted to the Committee of Graduate Studies in partial fulfillment of the requirements of the degree of Doctor of Philosophy in …
Year: 2017, 2017
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Lock, Alan S., Thesis advisor (ths): Wallschläger, Dirk, Thesis advisor (ths): Belzile, Nelson, Degree committee member (dgc): Belzile, Nelson, Degree committee member (dgc): Gueguen, Celine, Degree granting institution (dgg): Trent University Abstract: <p>A bedrock fracture hosting arsenic (As) contaminated groundwater was suspected to be transported to Ramsey Lake, a drinking water resource for more than 50,000 residents of Sudbury, Ontario. A high resolution, spatial, water quality mapping technique using an underwater towed vehicle (UTV) was used to identify sources of upwelling groundwater into lake water and localize the upwelling As… more Full Text: ASSESSING THE POTENTIAL FOR CONTAMINATION OF LAKES FROM UPWELLING OF ARSENICLADEN GROUNDWATER THROUGH SEDIMENTS A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctorate of Science in …
Year: 2017, 2017
Member of: Trent University Graduate Thesis Collection
Abstract: <p>As an emerging contaminant, the antimicrobial agent silver nanoparticles (AgNPs) have been receiving considerable attention to determine their potential effects to aquatic ecosystems. However, estimates of aquatic consumer survivorship and other toxicological endpoints vary considerably among experiments, largely due to the environment in which the test takes place. Throughout this… more Full Text: THE EFFECTS OF PARTICULATE MATTER ON THE FATE AND TOXICITY OF SILVER NANOPARTICLES A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Faculty of Arts and Science …
Year: 2016, 2016
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Micropollutants are discharged into the aquatic environment with industrial and domestic wastewater and these compounds may cause toxic effects in aquatic organisms. In this study, the toxic effects to fish of micropollutants extracted from ozonated and nonozonated municipal wastewater effluent (MWWE) were measured in order to assess the effectiveness of ozonation in reducing toxicity.… more Full Text: An Evaluation of Wastewater Treatment by Ozonation for Reductions in Micropollutant Toxicity to Fish A thesis submitted to the Committee of Graduate Studies In Partial Fulfilment of the Requirements for the Degree of Master of Science in the Faculty of …
Year: 2016, 2016
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The cyanidation technique is currently a viable technique for gold recovery that can replace the present amalgamation technique in Guyana. To implement this technique effectively, laboratory scale experiments and at scale runs were conducted to determine the best particle size of the ore, cyanide concentration, and leaching time. In addition, the profitability of cyanidation was compared… more Full Text: DOING IT RIGHT: ELIMINATING MERCURY USE IN GOLD MINING IN GUYANA A Thesis Submitted to the Committee on Graduate Studies In Partial Fulfillment of the Requirements for the Degree of Masters of Science in the Faculty of Arts and Science TRENT UNIVERSITY …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Selenium is an essential trace nutrient to many organisms, yet in high concentrations it is toxic. Organic selenium is more bioavailable to aquatic biota than inorganic selenium, but is usually found in much lower concentrations. Algae are known to biotransform inorganic selenium into several organo-selenium compounds, but it is unknown whether any of these bioaccumulate in the food… more Full Text: Purification and Identification of Selenium-containing C-phycocyanin from Spirulina: Implications for Bioaccumulation and Ecotoxicity A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements of the Degree of …
