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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

Half life period of chlorocresol in water was observed to be 38 days while in sediment it is 340 days. Based on these half life values of it is concluded that chlorocresol is readily biodegradable in water where as it is non biodegradable in sediment. However, since there is no diffusion of the substance in the sediment as evident from the reported data (1% in sediment) and hence persistence in the sediment compartment is not likely to be critical.

Key value for chemical safety assessment

Half-life in freshwater:
37.5 d
at the temperature of:
25 °C
Half-life in freshwater sediment:
337.5 d
at the temperature of:
25 °C

Additional information

Based on level III fugacity model the half life period of chlorocresol was estimated

Half life period of chlorocresol in water was observed to be 38 days while in sediment it is 340 days. Based on these half life values of it is concluded that chlorocresol is readily biodegradable in water where as it is non biodegradable in sediment. However, since there is no diffusion of the substance in the sediment as evident from the reported data (1% in sediment) and hence persistence in the sediment compartment is not likely to be critical.

Media

Half life

(days)

Percent in Medium

Water

38

19%

 

Sediment

340

1%