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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.

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