Fig. 6

Environmental safety evaluation. (A) Metal leaching concentrations (Zn, Fe) versus EPA discharge limits; (B) Ecotoxicity assessment showing EC₅₀ values for Daphnia magna.

Environmental safety evaluation. (A) Metal leaching concentrations (Zn, Fe) versus EPA discharge limits; (B) Ecotoxicity assessment showing EC₅₀ values for Daphnia magna.