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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