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Article Dans Une Revue International Journal of Life Cycle Assessment Année : 2011

Classification of chemicals into emission-based impact categories: a first approach for equiprobable and site-specific conceptual frames

Anne Ventura

Résumé

In the calculation of life cycle impact assessment indicators: for several direct contribution of one pollutant to several impact categories, the distribution between these impact categories is not accounted. The proposed approaches of non-redundant classification are based on the probability that an emitted substance and its chemically degraded forms are involved into several environmental impacts. Methods Two types of repartitions are examined in this paper: (1) one called equiprobable classification, based on identical probability of contributions to several impact categories, and (2) and one called zone classification based. Both methods are based on a classification coefficient alpha and require categorization of chemical pathways (reactive, suspensive, direct, indirect). The first method, the equiprobable classification, is a quick method that allows avoiding multiple counting of pollutants. The second method, the zone classification method, is based on two steps: (1) the first step requires defining an impacted zone around the source, inside which the emitted chemicals are expected to majorly diffuse or spread, and (2) in the second step, the score of the chemical is set according to the occurrence of the chemical target inside the impacted zone. Results Both methods are applied on a case study of NOx emissions in Paris. Results highlight big differences (33%.to 47%) when using or not the classification coefficient. Coefficients calculated using equiprobable or zone classifications are of the same order of magnitude except for indirect contributions.

Dates et versions

hal-00924823 , version 1 (07-01-2014)

Identifiants

Citer

Anne Ventura. Classification of chemicals into emission-based impact categories: a first approach for equiprobable and site-specific conceptual frames. International Journal of Life Cycle Assessment, 2011, 16 (2), pp 148-158. ⟨10.1007/s11367-010-0242-x⟩. ⟨hal-00924823⟩
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