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Table 1 Correction equations for hardness-adjusted toxicity values (LC50) of heavy metals (Cd, Cu, Mn, and Zn) results from 24 h acute toxicity test using Daphnia magna

From: Ecological assessment of coal mine and metal mine drainage in South Korea using Daphnia magna bioassay

Metals

Correction equation

 

Cd

LC 50  = 1.0035 log(hardness) − 1.5425

r 2 = 0.8257, p < 0.05

Cu

LC 50  = 0.1988 log(hardness) − 0.3133

r 2 = 0.9126, p < 0.05

Mn

LC 50  = 44.9173 log(hardness) − 56.9595

r 2 = 0.7968, p < 0.05

Zn

LC 50  = 21.5845 log(hardness) − 34.1380

r 2 = 0.9349, p < 0.05

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