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    Application of CATS models for regional risk-assessment of toxicants

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    Authors
    Traas TP
    Aldenberg T
    Type
    Report
    Language
    en
    
    Metadata
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    Title
    Application of CATS models for regional risk-assessment of toxicants
    Translated Title
    Toepassing van CATS modellen voor regionale risk assessment van bioaccumulatie
    Publiekssamenvatting
    Toepassing van CATS modellen voor een regionale risicobeoordeling van bioaccumulatie bleek mogelijk. Voorbeeldstudies voor zware metalen en organotin lieten zien dat beginconcentraties, de belasting van het systeem en sorptieconstantes de berekening van platrisico's sterk beinvloeden. Consistente milieunormen voor land, water en sediment maken een vergelijking mogelijk tussen verschillende ecosystemen en/of regio's. Het beoordelen van bioaccumulatie van verschillende stoffen in voedselwebben is minder consistent omdat kritische concentraties, NOECs etc. vaak niet voor dezelfde organismen voorhanden zijn. De overschrijding van bestaande normen voor voedselwebben kan routinematig worden berekend door de hier getoonde berekeningswijze te vereenvoudigen.<br>
    Application of CATS models for regional assessment of bioaccumulation risks proved feasible. Case studies on heavy metals and organotin showed that initial concentrations, toxicant loading of the system and sorption coefficients strongly influence the prediction of bioaccumulation risks. Consistent quality objectives for soil, water and sediment allow a comparison between different ecosystems or regions. The evaluation of foodweb bioaccumulation for different toxicants is much less consistent since critical concentrations, NOECs etc. are not always available for the same organisms within food webs. Exceedance of quality objectives for food webs can be calculated on a routine basis by simplification of the procedure presented here.<br>
    Publisher
    Rijksinstituut voor Volksgezondheid en Milieu RIVM
    Sponsors
    DGM/SVS
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