New insights into silica scaling on RO-membranes

Andreas Kempter, Torben Gaedt, Volodymyr Boyko, Stephan Nied, Keith Hirsch

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


The polymerization of silica in hard water was investigated by using different supersaturation levels of silica at pH 7 and 8. The results indicate a kinetically stable range up to ~400ppm [SiO2] under the chosen conditions at pH 7, whereas no such range is present at pH 8. Additionally, polyvinylpyrrolidone and polyethers were tested for their silica inhibition capabilities. It was found that the performance is depending on molecular weight as well as dosage of the polymers, respectively. From these results, a mechanism for inhibition at pH 7 and 8 was suggested.

Original languageEnglish
Pages (from-to)899-907
Number of pages9
JournalDesalination and Water Treatment
Issue number4-6
StatePublished - 2013
Externally publishedYes


  • Antiscalants
  • Polymers
  • RO membranes
  • Scaling process
  • Silica polymerization
  • Silica scale


Dive into the research topics of 'New insights into silica scaling on RO-membranes'. Together they form a unique fingerprint.

Cite this