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Terrestrial Effects

An earthworm acute toxicity test (OECD TG 207) of commercial LAS (average carbon chain length of 11.36) was performed with Eisenia foetida on artificial soil. The 14d-LC50 for Eisenia foetida was more than 1000 mg/kg.

The No effect concentration was nominal NOEC=250 mg/kg soil.

In another study used Lumbricus terrestris for 14days and 14d-LC50 value was more than 1333 mg/kg.

The no effect concentration was nominal NOEC=667 mg/kg soil.

 

Groups of 10 male and 10 female F. fimetaria were exposed to concentrations of LAS ranging from 0 -1000 mg/kg dw soil for 21 days. At the end of the 21 days, the number of F. fimetaria were counted, and the number of surviving adults and juveniles as the result of reproduction were counted. There was no effect on adult survival, however, there was a dose-related decrease in reproduction.

The EC10 based on reproduction was 147 mg/kg dw soil.

 

Groups of 10 male and 10 female Folsomia fimetaria were exposed to various concentrations of Na-LAS in three different soil types for 21 days. At the end of this period, the number of adult and juvenile organisms was counted. Another test was done to compare the toxicity of three LAS salts, Na, Ca, and Mg, in one soil type (sandy). There was little variation in toxicity among the three soil types and in the three salt species.

The EC10 for Folsomia fimetaria in various soils ranged from 85-93 mg/kg dry weight soil

 

The ECOSAR QSAR model predicts that 30-day,NOECcited as a ChV value would to be7.346 mg/L(ppm) for terrestrial plants.

The ECOSAR QSAR model predicts that 96-hr EC50 value would to be12.086mg/L (ppm) for terrestrial plants.

Field studies to terrestrial plants indicate that dodecylbenzenesulfonic acid affects the growth and decrease in survival of Orchid (Phalaenopis) (Ernst et al., 1971).

NOEC was 10 mg/kg soil.dw and EC50 was 100 mg/kg soil.dw

 

Three species of crop plant B. rapa, A. sativa, and S. alba, were grown in soil containing concentrations of LAS that varied from 0 -10,000 mg/kg dw soil. The seedlings were grown for 14 days, and then weighed. The weight was compared to weights of controls plants. All three species showed a dose-related reduction in growth.

The EC10 for B. rapa was 86 mg/kg dw soil, for A. sativa it was 80 mg/kg dw soil, and for S. alba it was 200 mg/kg dw soil.

 

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