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Environmental fate & pathways

Additional information on environmental fate and behaviour

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Administrative data

Endpoint:
additional information on environmental fate and behaviour
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
other information
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Basic data are given, the study meets basic scientific principles.

Data source

Reference
Reference Type:
publication
Title:
Ergebnisse des Grossversuches - Einsatz eines Zeolith A-haltigen Waschmittels - in Stuttgart-Büsnau
Author:
Wagner R
Year:
1979
Bibliographic source:
Die Prüfung des Umweltverhaltens von Na-Al-Silikat Zeolith A als Phosphatersatzstoff in Wasch- und Reinigungsmitteln. Umweltbundesamt, Materialien 4/79, Erich Schmidt Verlag, Berlin, 58-71

Materials and methods

Principles of method if other than guideline:
Test type: field experiment on removal of zeolite A in wastewater treatment
Test duration: 14 months
Test location: municipal sewage treatment plant, Büsnau (Germany), activated sludge process
Test temperature: ambient
Investigated parameters: COD, BOD, phosphorus, nitrogen, ammonia, elimination
Type of study / information:
Sewage treatment

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Zeolite A (Sasil, sodium aluminium silicate), doped with indium to render zeolites accessible to neutron activation analysis.
- Chemical name: Zeolite, cuboidal, crystalline, synthetic, non-fibrous
- Framework: cuboidal
- Related CAS No. 1318-02-1

Results and discussion

Any other information on results incl. tables

The average overall removal rate observed in the Büsnau sewage treatment plant is 96%. 21% of the influent zeolite A are retained in the sand trap, 42% in the primary clarifier, and 33% in the biological treatment.

Applicant's summary and conclusion