|Characterisation Method Name:|
|HF impact on YOLL|
|Principal Method Name:|
|EPS: secondary aerosol pathway|
|YOLL stands for Year of Lost Life.|
Model for secondary aerosol pathway
The characterisation factor is determined by a modified equivalency method using SO2 as
a reference. SO2 is preferred before PM10 because it has a similar emission-dispersion-exposure pattern as SO2.
An equivalency factor with SO2 is determined through the formula:
(MF/MHF) / (MSO4/MSO2) = 0.633,
MF and MHF are the molecular weights of F - and HF, respectively, and MSO4 and MSO2 are the molecular weights of SO4 and SO2, respectively.
Calculation of pathway specific characterisation factor
The secondary aerosol pathway specific characterisation factor of SO2 for YOLL is 3.74E-05 YOLL/kg SO2, which thus will result in a characterisation factor for HF of 0.633*3.74E-05 = 2.36E-05 YOLL/kg HF.
|Steen B (1999b): A systematic approach to environmental priority strategies in product development (EPS). Version 2000 – Models and data of the default method CPM report Chalmers University of Technology Sweden|
|The system is global and the time period is 1990.|
|Characterisation Parameter||Category Indicator||Impact Indication Principle||Aspect||Substance||Quantity||Unit||Notes|
|HF||2.36E-05||p yr/kg||secondary aerosol pathway|