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Acute toxicity of heavy metals to aerobic digestion of waste cheese whey

Cimino, G. / Caristi, C.

AbstractEffects of the acidity and of metal ions on metabolic activity of activated sludge from waste cheese whey biological treatment have been determined. The 10% and 50% inhibitory concentrations (IC10 and IC50) were evaluated for each ion. In a decreasing order of toxicity two groups were found: Hg²⁺ > Cd²⁺ > CrO4²⁻ > Cr³⁺ > Cu²⁺ and Pb⁴⁺ > Zn²⁺. The discrepancy in results of other toxicity stufies reveals the impossibility of defining on an absolute scale an order of toxicity for these ions. A very strong synergistic effect was noted in the mixed Cu and Zn studies, thus pointing out the difficulty of setting a water-quality standard based on single toxic chemicals.

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Acute toxicity of heavy metals to aerobic digestion of waste cheese whey

Cimino, G. / Caristi, C.

AbstractEffects of the acidity and of metal ions on metabolic activity of activated sludge from waste cheese whey biological treatment have been determined. The 10% and 50% inhibitory concentrations (IC10 and IC50) were evaluated for each ion. In a decreasing order of toxicity two groups were found: Hg²⁺ > Cd²⁺ > CrO4²⁻ > Cr³⁺ > Cu²⁺ and Pb⁴⁺ > Zn²⁺. The discrepancy in results of other toxicity stufies reveals the impossibility of defining on an absolute scale an order of toxicity for these ions. A very strong synergistic effect was noted in the mixed Cu and Zn studies, thus pointing out the difficulty of setting a water-quality standard based on single toxic chemicals.

Acute toxicity of heavy metals to aerobic digestion of waste cheese whey

Cimino, G. / Caristi, C.

AbstractEffects of the acidity and of metal ions on metabolic activity of activated sludge from waste cheese whey biological treatment have been determined. The 10% and 50% inhibitory concentrations (IC10 and IC50) were evaluated for each ion. In a decreasing order of toxicity two groups were found: Hg²⁺ > Cd²⁺ > CrO4²⁻ > Cr³⁺ > Cu²⁺ and Pb⁴⁺ > Zn²⁺. The discrepancy in results of other toxicity stufies reveals the impossibility of defining on an absolute scale an order of toxicity for these ions. A very strong synergistic effect was noted in the mixed Cu and Zn studies, thus pointing out the difficulty of setting a water-quality standard based on single toxic chemicals.

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Title:

Acute toxicity of heavy metals to aerobic digestion of waste cheese whey

Contributors:

Cimino, G. (author) / Caristi, C. (author)

Published in:

Biological Wastes ; 33 ; 201-210

Publication date:

1990-02-05

Size:

10 pages

ISSN:

DOI:

https://doi.org/10.1016/0269-7483(90)90005-D

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

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