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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

methyl 5-nitrohydrogen.isophthalate is found to be biodegradable in water and sediment in approximately 360 h. This indicates that it is not persistent and therefore considered as biodegardable in water and sediment

Key value for chemical safety assessment

Half-life in freshwater:
360 h
at the temperature of:
20 °C
Half-life in freshwater sediment:
3 240 h
at the temperature of:
20 °C

Additional information

 

 

Mass Amount (percent)

Half-Life (hr)

Emissions (kg/hr)

Water

29.6

360

1000

Sediment

0.069

3.24e+003

0

 

 

Fugacity (atm)

Reaction (kg/hr)

Advection (kg/hr)

Reaction (percent)

Advection (percent)

Water

1.64e-017

1.11e+003

576

37

19.2

Sediment

1.48e-017

0.287

0.0268

0.00956

0.000894

 

Persistence Time: 648 hr

Reaction Time: 802 hr

Advection Time: 3.38e+003 hr

Percent Reacted: 80.8

Percent Advected: 19.2

 

Half-Lives (hr), (based upon Biowin (Ultimate) and Aopwin):

Air: 343.2

Water: 360

Soil: 720

Sediment: 3240

Biowin estimate: 2.760 (weeks )

 

Advection Times (hr):

Air: 100

Water: 1000

Sediment: 5e+004