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Toxicity to aquatic algae and cyanobacteria

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In the acute algal toxicity test none of the UGI exhibited more than 50% effect at a 100 mg/L loading (7 days). Therefore, the unbounded 72-h EC50 is > 100 mg/L. UGI show effect levels in most cases well below the 10% chronic effect level. This is not surprising since chemical analysis results from previous transformation/dissolution tests do indicate that releases of most metal concentrations are very close or below detection limits (Skeaff and Hardy, 2007). The unbounded 72h-EC10 is > 1 mg/L for all the UGI products.

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