engleski

Combined toxic unit: moving towards a multipath risk assessment strategy of organic contaminants in river sediment

Toxic unit(TU)approach is currently currently prevailing in risk assessment of freshwater pollution (Ginebreda et al., 2014 ).It is defined as the the ratio between measured concentration of organic contaminants contaminants (OCs) in the water wand toxicological endpoints endpoints for aquatic organisms gathered from databases or by in - silico tools tools. To accentuate the importance of assessing both uptake paths in process of pollutant prioritization present in the the aquatic environment we propose an extension of the TU approach, by adding a factor containing the octanol-water partition coefficient as an estimator for lipid-water partitioning, sediment concentration and toxicity. It results in an estimative prioritization index, combined toxic unit (CTU). More effort must be invested in understanding diverse uptake paths of OCs into aquatic organisms. The CTU is an estimative index emphasizing both highly hydrophilic and lipophilic OCs no matter the uptake path.

toxic unit, organic contaminats, sediment, risk assessment

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