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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Administrative data

Endpoint:
biodegradation in water: simulation testing on ultimate degradation in surface water
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: No official guideline followed but study well designed, conducted and sufficiently documented.

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
2009

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 306 (Biodegradability in Seawater)
Deviations:
yes
Remarks:
Tested concentrations: 4 - 9 mg/L as TOC; Incubation temperature: 28 °C
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
4,4'-sulfonyldiphenol obtained from TCI Chemicals, Tokyo, Japan. Purity not specified

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
natural water
Details on source and properties of surface water:
Seawater was collected in December, january and October at two sites in the bay of Osaka, Japan:
- south port area of the city (+34° 38' 12.39", +135° 24' 41.67")
- north port area (+34° 39' 53.30", +135° 25' 15.35")
Water quality parameters:
pH: 7.4 - 8.2
Turb. (mg/L): 0 - 12
DO (mg/L): 4.3 - 11.4
Temp. (°C): 8.6 - 23.4
Cond (S/m). 4.1 - 4.9
CFU/mL: 300 - 5300

CFU: Colony Forming Units
Duration of test (contact time):
60 d
Initial test substance concentration
Initial conc.:
>= 4 - <= 9 mg/L
Based on:
other: TOC

Results and discussion

% Degradation
% Degr.:
0
Parameter:
test mat. analysis
Sampling time:
60 d
Transformation products:
no
Details on results:
Mass balance
Sum of daily mass load of BPS through all WWTPs (mean, unit: g):
influent: 56.2 (thereof 1.19 adsorbed mass)
effluent: 0.703 (thereof 0.107 adsorbed mass)
sludge: 0.259

Applicant's summary and conclusion

Conclusions:
The concentration of 4,4'-sulfonyldiphenol remained unchanged over the test period of 60 days in the sea die-away simulation test samples.
Executive summary:

In this study, the biodegradation behaviors of three bisphenolss, namely BPA (4,4'-isopropylidenediphenol),

BPF (4,4'-methylenediphenol) and BPS (4,4'-sulfonyldiphenol) in seawater were investigated over a test period of 60 days using TOC Handai (TOC, potential test) and sea die-away (SDA, simulation test) methods, which are both a kind of river-die-away test.

Degradation of 4,4'-sulfonyldiphenol could not be detected in this study.