Sulfurous acid, lead salt, dibasic

Additional information on environmental fate and behaviour

Administrative data

Endpoint:

additional information on environmental fate and behaviour

Type of information:

calculation (if not (Q)SAR)

Remarks:

estimated by calculation

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The estimation are based on model that has been developed to assess the long-term fate and effects of metals in the environment.

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Materials and methods

Test guideline

Qualifier:

no guideline followed

Principles of method if other than guideline:

Lead addition was modeled in the TICKET-UWM simulations as a single instantaneous load addition and the removal from the water column was assessed generically simulating a standard lake environment (EUSES). The physical parameters of the generalized lake are based on regional distribution parameters from the EUSES program (RIVM, 2004). Specifically, time variable TICKET-UWM simulations were performed to assess lead removal from the water column relative to the definition of rapid removal for soluble metals of greater than 70% removal in a 28-day period (Institute for Health and Consumer Protection, 2009). In addition, potential remobilization of Pb from the anoxic/oxic sediment to the water column was also assessed.

GLP compliance:

no

Type of study / information:

Model calculations

Test material

Test material information

Constituent 1

Reference substance name:

Lead

EC Number:

231-100-4

EC Name:

Lead

Cas Number:

7439-92-1

Molecular formula:

Pb

IUPAC Name:

lead

Test material form:

other: soluble lead

Applicant's summary and conclusion

Conclusions:

It can therefore be concluded that for typical conditions in Europe, lead-ions are rapidly removed from the water-column (>70% within 28 days). Moreover, remobilization of Pb from the sediments to the water column is insignificant. This conclusion is critical to the chronic environmental classification.

Executive summary:

Time variable TICKET-UWM simulations were performed to assess lead removal from the water column relative to the definition of rapid removal for soluble metals of greater than 70% removal in a 28-day period. The following conclusion could be formulated:

-         For a standard lake environment consisting of the EUSES model lake parameters, lead removal from the water column satisfies the definition for rapid removal of 70% dissolved lead removal in 28 days; 

-          For a standard lake environment consisting of the EUSES model lake parameters, assessed at pH 6 to 7, lead removal from the water column satisfies the definition for rapid removal of 70% dissolved lead removal in 28 days;

-        The potential for remobilization from anoxic and oxic sediments, quantified by comparing water column lead concentrations resulting from sediment feedback to the 70% removal concentration, is insignificant