|Characterisation Method Name:|
|NOx impact on Base-cat-ion capacity|
|Principal Method Name:|
|EPS: Equivalency method using SO2 as a reference|
|The characterisation factor is determined by an equivalency method using SO2 as a|
When reacting with water and oxygen, 1 kg of NO2 may produce the same amount of protons as 0.5*64/46 = 0.70 kg SO2. When adsorbed by biota reactions may occur where N is reduced again and the net acid production is decreased.
The characterisation factor of SO2 for soil base-cat-ion capacity is determined in Base-cat-ion capacity of EPS for SO2 to 1.56 equivalents of base cat-ions per kg SO2. The characterisation factor of NOx is therefore 0.70*1.56 = 1.09 equivalents of base cations per kg NOx.
|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 residence time in air in the order of a week and the residence time in soil is less than a year. The flow group is emissions anywhere on the globe during 1990. The environmental system investigated is therefore chosen to be global during 1990|
|Characterisation Parameter||Category Indicator||Impact Indication Principle||Aspect||Substance||Quantity||Unit||Notes|
|CFactor||Base cat-ion capacity||EPS/2000||
|NOx||1.09||H+ mole equivalence/kg|