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Table 2 The correlation between zinc leaching efficiency on day 30 and individual physicochemical parameter at different stages

From: Responses of zinc recovery to temperature and mineral composition during sphalerite bioleaching process

Physicochemical parameters Day 6 Day 12 Day 21 Day 30
r p r p r p r p
pH 0.492 0.028 − 0.180 0.449 − 0.616 0.004 − 0.814 0.000
ORP − 0.003 0.989 − 0.075 0.755 0.274 0.242 0.410 0.073
Fe2+ 0.455 0.044 − 0.035 0.883 − 0.250 0.287 − 0.216 0.360
Fe3+ − 0.059 0.804 0.208 0.380 0.543 0.014 0.744 0.000
SO4 2− 0.407 0.075 0.592 0.006 0.745 0.000 0.786 0.000
Zn2+ 0.397 0.083 0.293 0.211 0.145 0.541 0.068 0.777
Cu2+ − 0.130 0.586 − 0.122 0.610 − 0.094 0.694 − 0.088 0.712
  1. Significant differences (p < 0.05) were indicated in italics