Table 1 Analysis of variance summary of all responses (Y1–Y3) for the three fitted polynomial models.

From: Removal of lead from aqueous solutions using three biosorbents of aquatic origin with the emphasis on the affective factors

Source

Y1(PbR)

Y3(PbO)

Y3(PbC)

F-ratio

p-value

F-ratio

p-value

F- ratio

p-value

Model

53.29

 < 0.0001

27.90

 < 0.0001

26.57

 < 0.0001

A (Biosorbent Dosage)

138.31

 < 0.0001

49.62

 < 0.0001

6.41

0.0172

B (Biosorbent Size)

  

0.0032

0.9550

0.0630

0.8036

C (Contact Time)

8.26

0.0060

0.6169

0.4359

0.0764

0.7843

D (Temperature)

0.9873

0.3253

  

5.27

0.0294

E (Initial Concentration)

301.13

 < 0.0001

169.00

 < 0.0001

75.71

 < 0.0001

F (pH)

111.61

 < 0.0001

35.07

 < 0.0001

22.80

 < 0.0001

G (Salinity)

14.12

0.0005

3.15

0.0820

90.12

 < 0.0001

AF

3.56

0.0652

    

DE

16.67

0.0002

    

EG

  

5.25

0.0261

  

FG

3.19

0.0805

    

A2

32.61

 < 0.0001

9.81

0.0029

  

B2

  

25.12

 < 0.0001

  

C2

2.76

0.1033

15.00

0.0003

  

E2

11.64

0.0013

6.84

0.0118

  

Lack of Fit

1.46

0.3462

0.64

0.6821

4.46

0.0517

  1. PbR: Concentration of Pb adsorbed by scales of Rutilus kutum; PbO: Concentration of Pb adsorbed by scales of Oncorhynchus mykiss; PbC: Concentration of Pb adsorbed by shells of Cerastoderma glaucum.
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