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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 20 of 25 for “"salt transport"”.
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Mechanisms and variability of salt transport in partially-stratified estuaries
The variability of salt transport determines the variation of the length of the salinity intrusion and the large-scale density gradient in an estuary. This thesis contains three studies that address salt transport and the salt balance. The variation of salt transport with the depth, the …
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Mechanisms and variability of salt transport in partially-stratified estuaries
The variability of salt transport determines the variation of the length of the salinity intrusion and the large-scale density gradient in an estuary. This thesis contains three studies that address salt transport and the salt balance. The variation of salt transport with the depth, the …
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The Digital Simulation of Areal Salt Transport to Evaluate Water Management Proposals in a Coastal Aquifer
Made available in DSpace on 2014-12-14T07:10:53Z (GMT). No. of bitstreams: 1 7915314.pdf: 7363335 bytes, checksum: 914d42e4735d0a85b083ea08eff1d5cc (MD5) Previous issue date: 1979
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Analysis of Multi-Salt Transport and Salt Leakage Pathways in Bipolar Membrane Electrodialysis for Brine Valorization
… of nitrate and sodium chloride. We analyze the transport of different ions in the mixed solution and compare the performance of the mixed salt permeate to an idealized single salt feed. BMED was shown to be just as effective at producing acid and base from the composition of polluted groundwater …
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The Role of Kelvin Waves on the Circulation and Salt Transport Variability in the Coastal Bay of Bengal
… better understanding the region is resolving the salt transport within a dynamic freshwater flux environment in contrast to a highly evaporative environment. The Indian Ocean shows significant variability in the distribution of sea surface salinity (SSS), especially in the BoB and the Arabian Sea …
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Regional-scale groundwater flow and salt transport models for exploring agro-environmental remediation strategies in an irrigated river valley
To view the abstract, please see the full text of the document.
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Study On the Basin Scale Salt Exchange In the Indian Ocean Using Satellite Observations and Model Simulations
… understanding for the region is the resolving of salt transport within a dynamic freshwater flux environment. The freshwater influx leads to intense salinity stratification in the regions like the Bay of Bengal (BoB) and helps maintain warmer surface temperature. The synoptic information on sea …
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A spatial decision support system for basin scale assessment of improved management of water quantity and quality in stream-aquifer systems
… return flow quantity and quality evaluation and salt transport through reservoirs, as well as with a new water quality module (WQM) for conservative salt transport modeling of conjunctive use of surface water and groundwater resources in the river basin network. In this research, innovative …
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Poly(4-vinylpyridine)-filled microporous membranes: Factors affecting transport and selectivity
… the quaternizing alkyl group on the rate of acid transport through the membranes and the selectivity of acid transport relative to salt transport have been determined. Activation energies as well as entropy terms for the diffusion of acid through the membranes have been determined which provide …
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Investigating transport through sub-nanometer zeolites pores
… limited by the solution-diffusion mode of water transport through a tortuous polymeric active layer. Alternatively, simulations suggest that introducing rigid sub-nanometer pores into the active layer could substantially increase the water permeability and achieve perfect salt rejection. In this …
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Advanced characterization of transport and microstructural properties in membrane materials
… relationships that govern water and salt transport in conjunction with scaling processing methods. Material properties can be tuned by increasing salinity, adjusting humidity, or introducing filler particles to achieve desired transport metrics. These modifications impact water and …
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Sensitivity of the Estuarine-shelf Exchange in Mississippi Coastal Waters to River Diversions and Linkage Pathway Bathymetry: A Modeling Study
… processes, including flushing time, sediment transport, and larval dispersion. This study examines the exchange flow in the MS Sound by estimating the volume transport and salt transport along the seven tidal inlets in 2019 by using msbCOAWST, the specifically designed coupled model’s …
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Assessing the salinity effects and economic feasibility of on-farm desalination technology in irrigated semi-arid regions
… technology on multi-decadal salinity fate and transport and explore whether the technology is viable to improve soil health, crop yield, and long-term profitability. A subsurface salt transport model (MODFLOW-RT3D) is applied to a 50,600-ha (125,000 acres) region in southeastern Colorado …
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Structure-Property Relationships in the Design of High Performance Membranes for Water Desalination, Specifically Reverse Osmosis, Using Sulfonated Poly(Arylene Ether Sulfone)s
… allows water to pass through while barring the transport of salt ions. This research focuses on the development of sulfonated poly(arylene ether sulfone) derivatives with differing amounts of sulfonation and with the ions placed at different structural positions. Previously, such materials were …
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The molecular genetic investigation of paediatric liver disease
… pathogenesis such as a ciliopathy or bile salt transport defect.
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Hydrologic-economic modeling of irrigated agriculture in the Lower Murrumbidgee Catchment : investigations into sustainability
… simulations of unsaturated zone flow and salt transport. These detailed simulations include realistic meterological forcing, crop root extraction, and the effect of shallow, saline watertables. The use of the model for policy analysis is demonstrated in a case study of the Lower …
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An altimetry based examination of the path and variability of the Agulhas Return Current
… and warm currents, are key regions of heat and salt transport as well as for oceanic carbon uptake, air-sea heat flux and nutrient transport, thus positional shifts may have far-reaching implications (Gray and Palter, 2017). While meridional trends (latitudinal migrations) have been observed in …
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The influence of temperature on ion transport in nanofiltration membranes
… recovery, while the key drawback is diminished salt retention. Although the change of these performance metrics is widely reported in literature, few sources explain the causative mechanisms. Temperature-variation of the mobilities of both solute and solvent species, the solute diffusivity and …
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Synthesis, crosslinking and characterization of disulfonated poly(arylene ether sulfone)s for application in reverse osmosis and proton exchange membranes
… methanol permeability, water permeability and salt rejection. In general, all of the crosslinked membranes had lower water uptake and swelling relative to their uncrosslinked counterparts, and less water uptake and volume swelling were correlated with increasing gel fractions. It was possible …
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Synthesis and Characterization of Hydrophilic-Hydrophobic Poly (Arylene Ether Sulfone) Random and Segmented Copolymers for Membrane Applications
… surface properties, and water uptake. Water and salt transport properties were elucidated at the department of chemical engineering at the University of Texas at Austin. The gas separation membranes presented in chapter three were poly(arylene ether sulfone) and poly(ethylene oxide) …
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