TUHH Open Research
Help
  • Log In
    New user? Click here to register.Have you forgotten your password?
  • English
  • Deutsch
  • Communities & Collections
  • Publications
  • Research Data
  • People
  • Institutions
  • Projects
  • Statistics
  1. Home
  2. TUHH
  3. Publication References
  4. Investigating the development and reproducibility of heterogeneous gypsum scaling on reverse osmosis membranes using real-time membrane surface imaging
 
Options

Investigating the development and reproducibility of heterogeneous gypsum scaling on reverse osmosis membranes using real-time membrane surface imaging

Publikationstyp
Journal Article
Date Issued
2018-02-15
Sprache
English
Author(s)
Benecke, Jan  
Haas, Moritz  
Baur, Fabian  
Ernst, Mathias  orcid-logo
Institut
Wasserressourcen und Wasserversorgung B-11  
TORE-URI
http://hdl.handle.net/11420/2604
Journal
Desalination  
Volume
428
Start Page
161
End Page
171
Citation
Desalination (428): 161-171 (2018-02-15)
Publisher DOI
10.1016/j.desal.2017.11.025
Scopus ID
2-s2.0-85035096076
Publisher
Elsevier Science
Reproducibility of heterogeneous gypsum scale development on a reverse osmosis membrane was investigated using real-time membrane surface imaging by light microscopy. Temporal scale development in nine identical experiments using virgin membrane samples followed reproducible trends with decreasing rate of detected crystals, linear increase of fractional surface coverage and decreasing rate of crystal growth. Significant scatter, however, was observed in between individual experiments with respect to absolute values for determined scaling parameters. Using an intentionally higher scale-forming ion concentration (+ 4.1%), scaling behavior lay within the previously observed scatter. Contrarily, stainless steel particles led to significantly higher crystal number densities and smaller mean crystal diameters, while surface coverage remained unchanged. Scale development on a repeatedly scaled and cleaned membrane sample showed increased crystal number densities, i.e. nucleation affinity, and smaller mean crystal diameters in each consecutive scaling experiment. Gypsum crystals physically altered the membrane surface and assumingly initiated additional hetero-nucleation sites. Our observations demonstrate that individual membrane samples exhibit significantly different overall and local nucleation affinities, which may be enhanced by deposited particulate matter or physical membrane surface alterations. Nucleation affinity, however, did not predominantly determine the overall propensity of gypsum scaling.
TUHH
Weiterführende Links
  • Contact
  • Send Feedback
  • Cookie settings
  • Privacy policy
  • Impress
DSpace Software

Built with DSpace-CRIS software - Extension maintained and optimized by 4Science
Design by effective webwork GmbH

  • Deutsche NationalbibliothekDeutsche Nationalbibliothek
  • ORCiD Member OrganizationORCiD Member Organization
  • DataCiteDataCite
  • Re3DataRe3Data
  • OpenDOAROpenDOAR
  • OpenAireOpenAire
  • BASE Bielefeld Academic Search EngineBASE Bielefeld Academic Search Engine
Feedback