Table 3 Part A: ANOVA summary of the predicted models for responses (SC and ΔpH) and Part B: ANOVA summary for fitted models applied in experimental design.

From: Bacterial acidic agents-assisted multi-elemental (Ni, Co, and Li) leaching of used lithium-ion batteries at high pulp densities

Responses

Model

ANOVA

Source

Sum of squares

df

Mean square

F-value

p value

Part A

 Sulfate concentration (SC) (g/l)

Quadratic

Model

706.30

9

78.48

940.21

< 0.0001

Residual

0.83

10

0.083

  

Lack of fit

0.74

5

0.15

8.15

0.0190

Pure error

0.091

5

0.018

  

Cor total

707.13

19

   

 ΔpH

Quadratic

Model

2.49

9

0.28

78.25

< 0.0001

Residual

0.035

10

3.536E−003

  

Lack of fit

0.023

5

4.605E−003

1.87

0.2549

Pure error

0.012

5

2.467E−003

  

Cor total

2.53

19

   

Responses

R-squared

Adj R-squared

Adeq precision

PRESS

Part B

 Sulfate concentration (g/l)

0.9988

0.9978

129.56

6.34

 ΔpH

0.9860

0.9734

35.14

0.21

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