Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Phosphorus species"”.
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Liberation of low-coordinate phosphorus species from anthracene-based molecular precursors
… leveraged for the generation of low-coordinate phosphorus species that have been generally too unstable to isolate and use under ambient conditions. These precursors exhibit a dibenzo-7-phosphanorbornadiene framework that has allowed access to free phosphinidenes, phosphinidene sulfides, and …
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Modelling and Monitoring of Phosphorus Transport and Speciation in Soil
… for the determination of dissolved reactive phosphorus (DRP) and a new method for the determination of total dissolved phosphorus (TDP). Both are ideally suited to the detection of phosphorus species in soil leachate and runoff waters over the concentration range 3 to 1000 ng 1-1. The effect …
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Effect of various dissolved species on anaerobic iron corrosion
… corrosion phenomenon is apparent. The effect of phosphorus, especially in oxidation states different than phosphate (+V) (e.g., PO3-3, PO2-3 and PH3 gas), on anaerobic iron corrosion was examined. Tests were conducted at pH 3, 7, and 10- 11 in a solution of 10-3 M NaCl. There was not a …
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Effects of phytic acid sorption on iron polymerization and at the ferrihydrite-water interface
Phytic acid is the most predominant organic phosphorus species in soils. Its stability in soils is mainly due to its high affinity for soil colloids, especially Fe (oxyhydr)oxides. They have been acknowledged as mobile/reactive adsorbents for P in soil-water environments. Although several sorption …
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Denitrification in a best management practice bioretention system
… potential, dissolved oxygen, and nitrogen and phosphorus species. Concentrations of nitrate and nitrite were below the detection limit for most samples, indicating consumption by denitrifying bacteria and high rates of removal for long detention times. Ammonia and phosphorus concentrations are …
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Analysis of gas phase composition in fuel and exhaust gas in Solid Oxide Fuel Cells
… and oxygen in fuels, the exact nature of the phosphorus species reaching the anode is unknown. Thermodynamic calculations vary in the predicted species at equilibrium, some of which are HPO (mass 48), HPO2 (mass 64), HPO3 (mass 80), and P4O 10 (mass 288). Mass spectroscopic analyses of exhaust …
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Exploring the Synthesis, Structure, and Reactivity of Phosphorus-Chalcogen Heterocycles
… of phosphinidene chalcogenides, a low-coordinate phosphorus and chalcogen species, have yet to be thoroughly explored. In this context, this dissertation describes the synthesis of a number of phosphorus-chalcogen heterocycles that can be degraded to provide stoichiometric access to low-coordinate …
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A Diverse Array of Synthetic Strategies for Phosphorus Group Transfer Chemistry: From Phosphinidenes to Phosphates
… of novel synthetic methods for the transfer of phosphorus-containing moieties, specifically metaphosphates and phosphinidenes. The work presented here has significant implications for both the fundamental understanding and practical advancement of synthetic inorganic and organic chemistry. …
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FLOW INJECTION TECHNIQUES FOR INVESTIGATING THE BIOGEOCHEMISTRY OF NUTRIENTS IN NATURAL WATERS
… the determination of nutrients, with a focus on phosphorus species, in natural waters. Chapter one presents a general overview of nutrients (P, N and Si) and their aquatic biogeochemistry and analytical methods for nutrient determinations in natural waters. Chapter Two reports a four channel Fl …
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Phosphorus fate and management on the Somerset Levels and Moors Ramsar ditch systems
Fundamental to all life, phosphorus is an essential nutrient and, contrastingly, a significant threat to surface water biodiversity globally as one of the most common causes of eutrophication in surface waters worldwide. Freshwater wetland ditches afflicted by these conditions undergo a shift from …
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Green Technologies and Sensor Networks for BMP Evaluation in Stormwater Retention Ponds and Wetlands.
… found excessive nutrient loading of nitrogen and phosphorus species from urban stormwater runoff can lead to ecological degradation and eutrophication of receiving lakes and rivers (Fareed and Abid, 2005). In response, the Florida Department of Environmental Protection (FDEP) has set forth …