<Originals>The Toxicity of Metallic Ions on the Activated Sludge and the Detoxication Effect of EDTA

概要

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Using the Warburg manometer, the author investigated the effect of metallic ions on oxygen uptake of activated sludge and calculated the values of TC_<50>(toxic concentration 50,the concentration of toxic substance required to obtain 50% inhibition of the oxygen uptake of unintoxicated sludge). The obtained results were as follows. 1) The toxicity was decreased with the following sequence in the unit of ppm. Cu^<2+>, Ag^+, Hg^<2+>, Ni^<2+>, Cd^<2+>, Zn^<2+>, Co^<2+>, Cr^<3+>. Cr^<6+> and Pb^<2+>. 2) The detoxication effect by EDTA was observed with Cu^<2+>, Ni^<2+>, Zn^<2+>, pb^<2+>, Cd^<2+> and Hg^<2+>. But for Ag^+ and Co^<2+>, it was small and for Cr^<3+> and Cr^<6+>, the effect was negligible.
岐阜薬科大学の論文
1971-06-30