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Environmental fate & pathways

Biodegradation in soil

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Description of key information

The study selected for allocation of the key value, Garcia Mônego (2008), was performed to GLP and to current accepted guidelines, and as such was considered of high reliability and adequate for the assessment of Biodegradation in soil of the test material, 2,4,6-tribromophenol.

Key value for chemical safety assessment

Half-life in soil:
7 d
at the temperature of:
20 °C

Additional information

Reference: Garcia Mônego, J. (2008)

Reliability: 1

Result: A mean half life (based on the 3 soil types tested) of 7 days, ranging from 5 to 10 days, indicating non-persistence in the three tested soils. The result of the metabolic pathway under aerobic conditions was mineralisation to carbon dioxide and the formation of bound residues.

Soil

%Degr.

Parameter

Sampling time

Sandy clay loam

88.21

Test mat. analysis

120 d

Clay

92.02

Test mat. analysis

120 d

Sand

93.41

Test mat. analysis

120 d

 

Soil

Half-life

Type

Remarks (e.g. regr. equ., r², DT90)

Sandy clay loam

5 d

(pseudo-)first order (= DT50)

DT90 17 days (biotic)

Clay

10 d

(pseudo-)first order (= DT50)

DT90 31 days (biotic)

Sand

6 d

(pseudo-)first order (= DT50)

DT90 19 days (biotic)

Sandy clay loam

189 d

(pseudo-)first order (= DT50)

DT90 629 days (abiotic)

Clay

252 d

(pseudo-)first order (= DT50)

DT90 837 days (abiotic)

Sand

523 d

(pseudo-)first order (= DT50)

DT90 523 days (abiotic)