Paper_Clip_Tutorial Part1.pdf - GaBi Software

The surface of the model is divided
into 3% surface water, 60% natural
soil, 27% agricultural soil and 10%
industrial soil. 25% of the rainwater is
infiltrated into the soil.
The potential toxicities (human,
aquatic and terrestrial ecosystems)
are generated from a proportion based
on the reference substance 1,4-
Dichlorbenzol (C6H4Cl2) in the air reference
section. The unit is kg 1,4-
Dichlorbenzol-Equiv. (kg DCB-Äq.) per
kg emission (GUINÉE ET AL. 2002).
The identification of the toxicity potential
is afflicted with uncertainties because
the impacts of the individual
substances are extremely dependent
on exposure times and various potential
effects are aggregated. The model
is therefore based on a comparison of
effect and exposure assessment. It
calculates the concentration in the
environment via the amount of emission,
a distribution model and the risk
characterisation via an input sensitive
module. Degradation and transport in
other environmental compartments
are not represented.
Toxicity potential can be calculated
with toxicological threshold values,
based on a continuous exposure to
the substance. This leads to a division
of the toxicity into the groups mentioned
above (HTP, AETP, TETP) for
which, based on the location of the
emission source (air, water, soil),
three values are calculated. Consequently,
there is a matrix for toxic
substances with rows of the various
toxicities that have impacts on both
humans and aquatic and terrestrial
ecosystems, and columns of the extent
of the toxic potential, considering
the different emission locations.
Appendix A
Halogenorganic
compounds
Heavy metals
DCB
PCB
Figure A 6: Human Toxicity Potential
(IKP 2003)
Figure A 7: Terrestrial Eco-Toxicity Potential
(IKP 2003)
Figure A 8: Aquatic Eco-Toxicity Potential
(IKP 2003)
90
PAH
Halogenorganic
compounds
Heavy metals
DCB
PAH
Air
Food
Products
PCB
Halogenorganic
compounds
Heavy metals PCB
DCB
PAH
Biosphere
(Terrestrial ecosystem)
Biosphere
(Aquatic ecosystem)