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Data of following studies are demonstrating rapid biodegradation of C12-LAS (including sodium dodecylbenzene sulfonate (DBS)) under aerobic and anaerobic conditions. Temmink and Klapwijk (2004) conducted OECD 301F test and the result is that more than 60% of mineralisation was achie

Biodegradation of sodium dodecylbenzene sulfonate (DBS), at 10 ppm was measured 75% after 11 days and test temperature was maintained at 20 deg C for 17 days. The sodium dodecylbenzene sulfonate (DBS) could be conclued as readily degradable.ved within 28 days.

For dodecylbenzene sulfonic acid (Dodecylbenzene sulfonic acids (CAS# 27176-87-0 , EC Number; 248-289-4) ) is a very close analogue of Sodium dodecylbenzenesulfonate (CAS No. 25155-30-0, EC Number; 246-680-4) ) and the dissociated acid it readily dissociates in water and release the dodecylbenzene sulfonic anion in solution.), the available study indicates 69% of the material mineralized after 28 days ,OECD 301B test (USEPA 1992).

 

Ward and Larson (1989) conducted a laboratory study and observed the biodegradation rate constant and half-life for C12-LAS in sludge-amended soil. The biodegradation rate constant for C12-LAS is 0.030 day-1and half-life for C12-LAS is 23.1 days. Scheunertet al., (1987) measured the biomineralization rate of dodecylbenzenesulfonate in soil/water suspension under anaerobic and aerobic conditions for 42 days. The results (40.6%14CO2: aerobic, 51.9%14CO2: anaerobic) showed that the substance was readily biodegradable by the micro-organisms present in soil.

 

Summary of Biodegradation

 

Type/ Method

Test material

Degradation

Duration

References

Aerobic/

OECD 301F

C12-LAS

> 60 % of mineralisation

28 days

Temmink and Klapwijk, 2004

Aerobic/

Other

Sodium dodecylbenzenesulfonate

75 %

11 days

Cook and Glodman, 1974

Aerobic/

OECD 301B

Dodecylbenzenesulfonic acid

69 % of mineralisation

28 days

USEPA 1992

Aerobic/

Other

C12-LAS

50%

23.1 days

Ward and Larson, 1989

Aerobic and Anaerobic/

Other

Dodecylbenzenesulfonate

40.6%14CO2of mineralization

(aerobic),

51.9%14CO2of mineralization (anaerobic)

42 days

Scheunertet al., 1987

 

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