| Popis: |
In sediments along river Bahlui, in northern Romania, chemical loads of PCBs, HCHs, DDTs and PAHs are lower than the admitted thresholds. Biological indices derived from phytoplankton show moderate levels of pollution. Ecotoxicological bioassays indicated low/no toxicity for river waters, but high toxicity for certain discharge points near the river. The general quality of the river waters appears to be average, but with important signals on the dangers posed by domestic discharges. In the wider geographical context of the Danube basin, we see even moderate levels of local pollution as menacing, because of pollution accumulation effects. |
