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  • Atomic absorption spectrophotometry; Cobalt; Copper; Deposit type; DEPTH, sediment/rock; DOWNWIND-H; Dredge; DRG; DWHD16; Elevation of event; Event label; Geochemistry; Horizon; Identification; Iron; Latitude of event; Longitude of event; Manganese; manganese micronodule; manganese nodule; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; Porosity; SAN_JUAN_1963; sediment; SNJ-DH2; Specific surface area; Spencer F. Baird; Water in rock; Wet chemistry  (1)
  • mixed surfactant adsorption  (1)
  • rutile  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Lyotropic effect in surface charge, electrokinetics, and coagulation of a rutile dispersion (1994)
    Springer
    Colloid & polymer science 272 (1994), S. 554-561 
    Details
    ISSN: 1435-1536
    Schlagwort(e): Coagulation ; electrokinetics ; interfacial layer ; lyotropic effect ; rutile
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau
    Notizen: Abstract Potentiometric, electrokinetic, and coagulation experiments with a rutile dispersion in the pH region above the point of zero charge exhibit an “inverse” lyotropic sequence for counterions: Li+〉K+〉Cs+. The potentiometric and electrokinetic data were interpreted by a surface complexation model assuming the Stern-Gouy-Chapman structure of the interfacial layer, which yielded the values of inner layer capacitances,C, and the intrinsic equilibrium constants,K ass 0 , characterizing the specificity of each counterion. These parameters were used to explain the order of lyotropic sequences in the adsorption, coagulation, and electrokinetic phenomena.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00653221
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Electrophoretic behaviour and viscosities of metal oxides in mixed surfactant systems (1998)
    Springer
    Colloid & polymer science 276 (1998), S. 72-80 
    Details
    ISSN: 1435-1536
    Schlagwort(e): Key words Electrokinetics ; mixed surfactant adsorption ; viscosity ; anatase ; alumina
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau
    Notizen: Abstract  The electrokinetic behavior and viscosity of anatase and alumina in mixed-surfactant solutions were investigated. Sodium dodecylsulfate and nonionic polyoxyethylene ethers were investigated as model surfactants. Pure nonionic surfactants adsorbed on anatase and coated the particles, so that the zeta potential was nearly zero near the critical micelle concentration of surfactant. At higher surfactant concentrations, an increase in the zeta potentials was observed, suggesting a change in the microstructure of the adsorbed layer. Addition of nonionic surfactant to positively charged anatase and alumina with some preadsorbed sodium dodecylsulfate reversed the surface charge of the oxide to negative, indicating enhanced coadsorption of the anionic surfactant. At higher concentrations of the nonionic surfactant, the charge reversed back to positive. Nonionic surfactants did not reverse the surface charge of these oxides in the absence of the anionic surfactant. Coenhanced adsorption of nonionic and anionic surfactants was used to stabilize alumina at the isoelectric point, where neither surfactant adsorbed appreciably on its own. These results suggest a dramatic change in conformation of the surfactant chains in mixed systems. Further explanation and justification of the proposed changes in adsorbed surfactant conformation require spectroscopic evidence.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003960050211
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
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    Unbekannt
    Chemical composition of marine manganese nodules from two potential mining sites of the Pacific Ocean (2023)
    PANGAEA
    Details
    Publikationsdatum: 2023-08-28
    Beschreibung: Manganese nodules were selected from various potential mining sites of the Pacific ocean. They were dried by heating at 110°C for 24 hours and ground to powder before their chemical analysis by atomic absorption spectrophotometry.
    Schlagwort(e): Atomic absorption spectrophotometry; Cobalt; Copper; Deposit type; DEPTH, sediment/rock; DOWNWIND-H; Dredge; DRG; DWHD16; Elevation of event; Event label; Geochemistry; Horizon; Identification; Iron; Latitude of event; Longitude of event; Manganese; manganese micronodule; manganese nodule; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; Porosity; SAN_JUAN_1963; sediment; SNJ-DH2; Specific surface area; Spencer F. Baird; Water in rock; Wet chemistry
    Materialart: Dataset
    Format: text/tab-separated-values, 20 data points
    Standort Signatur Erwartet Verfügbarkeit
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    DATEN PANGAEA
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