Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

For the registration substance no monitoring data are available. But for the structurally similar substance SAS (Secondary Alkane Sulfonate, CAS No. 97489-15-1, already REACH registered) such data are available (see Table). SAS has, as the registration substance, a sulfonate group and an alkyl chain between 12 and 15 carbon atoms. Both substances are readily biodegradable. Based on this facts a read-across to the SAS result is justified.

MONITORING DATA FROM VARIOUS SEWAGE TREATMENT PLANTS (STP)

In the SAS HERA Report (AISE, 2005) monitoring data for SAS in municipal STPs were given which are listed in Table 4.zzz below.

Table 4.zzz Influent & effluent concentrations of STP and associated Removal rates

Country

Location

Influent conc.

Effluent conc.

Reliability

Calc.

Removal

Ref.

Germany

Lüdinghausen

1,2 mg/L

2 µg/L

2

99,8 %

Klotz, 1994b

Germany

Marl-Ost

0,5 mg/L

4 µg/L

2

99,2 %

Klotz, 1994b

Germany

München II

(Autumn 1993)

0,3 mg/L

< 1 µg/L

2

> 99,7 %

Klotz, 1994b

Germany

München II

(Winter1993)

0,5 mg/L

2 µg/L

2

99,6 %

Klotz, 1994b

Switzerland

Zürich-Glatt

0,54 – 0,89 mg/L

<1-17 µg/L

1

96,9 - >99,9 %

Field et al., 1994

Switzerland

Bülach

0,85 mg/L

< 1 µg/L

1

> 99,9 %

Field et al., 1994

Switzerland

Niederglatt

0,67 mg/L

< 1 µg/L

1

> 99,9 %

Field et al., 1994

Switzerland

Opfikon

0,61 mg/L

< 1 µg/L

1

> 99,8 %

Field et al., 1994

Reliability criteria of IUCLID are used

Based on the removal rates given in Table 4.zzz an average removal of 99.4 % can be calculated.

MONITORING DATA OF SAS IN SEWAGE SLUDGE

In the SAS HERA Report (AISE, 2005) monitoring data for SAS sewage sludge were given which are listed in Table 4.aaa below.

Table 4.aaa Monitoring data on SAS in Sewage sludge

Country

Location

Primary sludge

Secondary sludge

Digested sludge

Relia-bility

Reference

Germany

Kriftel (1991)

-

0,05 g/kg dw.

3 g/kg dw.

2

Klotz, 1994b

Germany

Lorsbach (1991)

-

< 0,1 g/kg dw.

0,4 g/kg dw,

2

Klotz, 1994b

Germany

Lüdinghausen (1986)

1,8 g/kg dw.

0,6 g/kg dw.

2,4 g/kg dw.

2

Klotz, 1994b

Germany

Lüdinghausen (1987)

1,2 g/kg dw.

1,7 g/kg dw.

2,9 g/kg dw.

2

Klotz, 1994b

Germany

Essen(1987)

-

-

3,3 g/kg dw.

2

Klotz, 1994b

Germany

 

München (1987)

-

< 0,1 g/kg dw.

-

2

Klotz, 1994b

Germany

München (1993)

-

< 0,1 g/kg dw.

-

2

Klotz, 1994b

Switzerland

Zürich (1992)

-

-

0,8 g/kg dw.

2

Field, 1992

Switzerland

Opfikon (1992)

-

-

0,8 g/kg dw.

2

Field, 1992

Switzerland

Niederglatt (1992)

-

-

0,3 g/kg dw.

2

Field, 1992

Switzerland

Seegräben (1992)

-

0,4 g/kg dw.

-

2

Field, 1992

Switzerland

Stäfa (1992)

-

0,5 g/kg dw.

-

2

Field, 1992

Switzerland

Zurich(1995)

-

0,5 g/kg dw.

0,7 g/kg dw.

1

Field, 1995

Reliability criteria of IUCLID are used

FATE OF SAS IN SEWAGE TREATMENT PLANTS

Field et al. (1995) have carried out a detailed mass balance investigation on the fate of SAS in the municipal sewage treatment plant of Zurich-Glatt (Figure see AISE HERA SAS, 2005).

15.6% of SAS entering the STP is transfered via primary sludge to anaerobic digester and 84.4% of SAS enters the activated sludge plant. In the activated sludge 84.1% is of SAS is biodegraded and 0.3% of SAS is in the effluent of the STP. This mass balance is used for the environmental exposure assessment of SAS.

MONITORING DATA OF SAS IN GERMAN RIVERS

SAS monitoring data from six German rivers measured at 13 different locations are available (AISE HERA SAS, 2005). At 11 locations the measured SAS concentration was <= 1 µg/L which was the limit of detection. At 2 locations higher SAS concentrations were found but the reliability of these measurements cannot be assigned from the available data (see Table 4.bbb).

Table 4.bbb Monitoring data of SAS in 6 German rivers

River names

No. of Locations

Conc. in river

Reliability

Reference

Isar

near STP Munich II

(Winter 1993)

1

above STP:

< 1 µg/L

below STP:

1 µg/L

2

Klotz, 1994b

Main

nearFrankfurt

(Summer 1993)

1

< 1 µg/L

2

Klotz, 1994b

Leine

near STP Herrenhausen

1

< 1 µg/L

2

Klotz, 1994b

 

Rur, Wurm, Inde

 

8

< 1 µg/L

4

Schulze, 2001

 

Rur

 

6

 

1 µg/L

(median)

 

4

Schroeder, 1995

Reliability criteria of IUCLID are used