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Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

The adsorption/desorption of TOPP as a whole substance is not scientifically necessary or meaningful for the purpose of environmental exposure assessment. It is necessary to consider the adsorption properties of the individual constituents of TOPP. As a consequence, in this section, only data describing the adsorption/desorption of TOPP constituents are considered.

Additional information

The distribution in a waste water treatment plant for the constituent blocks of TOPP has been estimated using the SimpleTreat model (implemented in EUSES 2.1.2) based on the physicochemical and biodegradation properties, see the table below. These distributions are also indicative of the distribution in the wider environment.

The estimated distribution for each TOPP block is shown in Table 4.2.3.

Table 4.2.3: Distribution modelling in STP

Block number

% to air

% to water

% to sludge

% degraded

1

59.8

3.54

7.97

28.7

2

83

4.96

8.03

4.02

3

59.9

3.47

8.66

28

4

32.4

19.9

0.213

47.5

5

46.8

15.5

0.0457

37.6

6

16.5

5.37

77.3

0.819

7

1.64

12

1.2

85.2

8

86.2

5.73

8.06

0

9

45.2

54.4

0.441

0