Corrosion and runoff from zinc-coated materials and outdoor structures is an important source for the dispersion of zinc in the environment.
Runoff water was analysed chemically and evaluated for its possible environmental impact, using both a biosensor test with the bacteria Alcaligenes eutrophus (BiometR) and the conventional 72 h growth inhibition test with the green alga Raphidocelis subcapitata.
Rates of malformation in medaka fry from paddies treated twice a week with anti-dandruff shampoo (0.18?0.37 μL/L each time) over a period of 4 months were within the natural background, perhaps due to the quick dissipation rate of this chemical in the environment.
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