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 “"Particle Water"”.
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COMPLEXATION AND PARTICLE-WATER INTERACTIONS OF NICKEL IN ESTUARIES
The speciation and particle-water interactions of Ni were investigated in three estuaries with contrasting pollution levels, hydrodynamics and geochemical characteristics. Samples of water and sediments were collected seasonally from the Tamar, Tweed and Mersey Estuaries. The chemical speciation of …
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Particle-Water Interactions of Ni and Zn in Coastal Waters
… SPM in winter but at the same rate in spring. Particle-solute interactions of Ni and Zn, investigated using the radioisotopes ⁶³Ni and ⁶⁵zn, indicated significant variation in metal partitioning (Kd) for the SPM end-members of the Humber coastal zone with Ni Kd's varying from 6.7 x 10² for …
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PARTICLE-WATER INTERACTIONS OF HYDROPHOBIC ORGANIC MICROPOLLUTANTS IN MARINE SYSTEMS
… (HOMs) is of paramount importance to water quality managers because of their toxicity, persistence, and liability to bioaccumulate. In this study, the role played by the main estuarine variables (organic matter, suspended particulate matter [SPM], particle type and salinity) on HOM …
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Trace Metal-Particle Water Interactions in the Western North Sea
… zone were significantly influenced by freshwater discharge, tidal regime at the mouth of the estuary and prevailing wind conditions Total trace metal fluxes across the mouth of the Humber Estuary were highest during spring (311, 8 96 & 1045 kg day-1, for Cu, Cd and Pb respectively) and …
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Investigating the pH of atmospheric fine particles and implications for atmospheric chemistry
Particle acidity is a critical but poorly understood quantity that affects many aerosol processes and properties, including aerosol composition and toxicity. In this study, particle pH and water (which affects pH) are predicted using a thermodynamic model and measurements of RH, T, and inorganic …
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THE INFLUENCE OF SURFACTANTS ON THE SORPTION OF PHENANTHRENE IN NATURAL WATERS
… industrially ensures their presence in natural waters. Owing to both their hydrophobic and hydrophilic properties, surfactants are capable of both adsolubilisation and solubilisation of co-contaminants, hence, their presence in natural waters is considered extremely significant. The purpose of …
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Role of Water in the Formation, Transformation and Fate of Secondary Organic Aerosol
Particle-phase water is the most abundant atmospheric aerosol constituent, yet the importance of water for the formation, transformation and fate of secondary organic aerosol (SOA) remains not fully characterized. In order to address this knowledge gap, this thesis explores the role of water in SOA …
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Sediment-water exchange of polycyclic aromatic hydrocarbons in the lower Hudson Estuary
… hydrophobic organic contaminants (HOCs) between water and polyethylene, were shown to be useful for the measurement of dissolved HOCs like polycyclic aromatic hydrocarbons (PAHs) in natural waters. These PEDs allow for the measurement of the fugacity or "fleeing tendency" of such chemicals in …
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Accelerated settling of particulate matter by ’marine snow’ aggregates
… strong evidence for rapid settling of marine particles by aggregates. Particle water column residence times were determined by measuring the time lag between the interception of a flux event in a shallow trap and the interception of the same event in a deeper trap at the same site. Effective …
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The role of colloidal material in the fate and cycling of trace metals in estuarine and coastal waters
… fractionation (FFF) of colloidal Beaulieu River water highlighted the significance of the smaller colloidal fractions (<0.08^m and 0.08 to 0.134m) which contained the highest concentration of Fe, Mn and Zn when normalised to an assumed geometric surface area. A spatial and seasonal investigation …
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Investigating electrolyte-reagent-mineral interactions in response to water quality challenges in the flotation of a PGM ore
… Among other factors affecting flotation, water is a major factor as it acts as a reagent and transport medium. Therefore, it stands to reason that the quality of the water used in the process matters. Current environmental restrictions on water usage which are aimed at addressing the …