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Showing 1 to 11 of 11 for “"Rhodamine WT"”.
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The effects of rhodamine WT and chlorine on the recovery of fecal coliforms
… in a natural stream water were exposed to rhodamine WT dye, chlorine and both in combination. Samples were analyzed for coliforms by three enumeration techniques. Statistical analyses of data by the paired-t test showed that for non-chlorinated samples no significant difference (0.10 level) …
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A field investigation of diffusion within a submerged plant canopy
… flows from 2-12 cm/sec were investigated using Rhodamine WT tracer, with resultant measured diffusivities ranging from approximately 0.5-3.0 cm2/sec. Diffusivity was found to be a strong function of ambient current, but a much weaker function of vegetation density. Presence of vegetation caused …
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Novel covalent organic framework (COF) thin-film composite nanofiltration membrane for effective removal of organic compounds from petroleum produced water
… the higher-molecular weight organic surrogate, Rhodamine-WT (R-WT), and less than 10% rejection of model inorganic salt, NaCl. The solution-diffusion model was used to determine the permeation parameters for model compounds. The model revealed that a significant portion of the overall permeation …
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Development and performance characterization of first-generation dendrimeric nanofiltration membranes
… capability against selected organic surrogate, Rhodamine-WT (R-WT), and inorganic salts, NaCl and MgSO4. All seven membranes resulted in a similar and high rejection of R-WT at around 96% or above, and a spectrum of varying rejections for NaCl ranging from 10% to 90%, and similar rejection for …
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Field and laboratory studies concerning the detection of enteric viruses in either settled or disinfected secondary sewage
… basin and chlorine contact chamber were based on Rhodamine WT dye studies of plant-scale units. These studies suggested that 98.5 to 100 percent of the enteric viruses contained in the actual plant effluent would be removed or inactivated by the combination of final settling and chlorination.
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Improving Design Guidance for In-Stream Structures Used in Stream Restoration
… velocity calculations. This was done by using Rhodamine WT dye tracer experiments to determine n values during storm flows in two SPSC structures in Annapolis, MD, which were then compared to predicted n values. Values of Manning's n determined in the SPSCs at low flows (0.28-12) often exceeded …
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Evaluation of Constructed Wetlands and Pretreatment Options For the Treatment of Flow-through Trout Farm Effluent
… affinity of gravel-bed media, and influence on Rhodamine WT (RWT) transport. HSSF wetlands coupled with mechanical pretreatment demonstrated significant (p <0.05) removal of total ammonia-nitrogen (TAN), total phosphorus (TP), total organic carbon (TOC), total suspended solids (TSS), five-day …
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The Effects of Varying Fresh Water Discharge on Dispersion in an Estuarine Hydraulic Model of the Lafayette River, Norfolk, Virginia
… of constant range and period. Batch releases of Rhodamine WT dye were made in the model and sampled throughout the river for ten tidal cycles. Samples were taken simultaneously at selected high and low water slack.</p> <p>The calculation of the Estuary Number, Estuarine Richardson Number, and the …
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Development and physicochemical characterization of thin-film composite nanofiltration membranes with covalent organic framework active layers
… is increasing due to unprecedented population growth, accelerated urbanization, economic development, and climate change. With water demand outpacing supply, intensifying periodic water shortages are driving the development of creative solutions to address this global challenge. These include …
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Treatment of Rainbow Trout <i>(Oncorhynchus mykiss)</i> Raceway Effluent Using Baffled Sedimentation and Artificial Substrates and Characterization of Nutrient Leaching Rates from Settled Rainbow Trout (Oncorhynchus mykiss) Sludge
… than theoretical values, respectively based on a rhodamine WT dye study. Average surface overflow rates were adjusted accordingly and measured 19.1 m³/m²-day when the Aquamats® were installed, versus 14.8 m³/m²-day when the Aquamats® were removed for the overall basin. These rates are lower than …
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Effect of iodination on NF270 nanofiltration membrane structure and performance
Made available in DSpace on 2017-09-29T17:56:46Z (GMT). No. of bitstreams: 2 LEVATO-THESIS-2017.pdf: 2402000 bytes, checksum: 8c4f49706ddd057c5afa20f7897ce3cd (MD5) LICENSE.txt: 4213 bytes, checksum: 3a65aed08aeda2d8e61923f83a1c2953 (MD5) Previous issue date: 2017-07-14