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Table 10 Pearson and Spearman rank correlation coefficients of (P)HCA molecular properties and adsorption isotherm parameters

From: Adsorption of aliphatic polyhydroxy carboxylic acids on gibbsite: pH dependency and importance of adsorbate structure

 

Pearson correlation coefficient

C surf, max

C surf, min

PAmin

PAmax

pKOH1

V vdw

M

z

K d1

c sat

K L

Spearman correlation coefficient

 Csurf, max

1.00

1.00

 0.98

 0.98

0.87

 0.98

 0.98

− 0.84

0.75

− 0.56

− 0.02

 Csurf, min

0.90

1.00

 0.96

 0.98

0.89

 0.96

 0.97

− 0.87

0.80

− 0.55

− 0.09

 PAmin

 1.00

 0.90

1.00

0.99

− 0.78

1.00

0.99

0.84

− 0.67

0.65

− 0.15

 PAmax

 0.90

 1.00

0.90

1.00

− 0.81

1.00

1.00

0.89

− 0.72

0.67

− 0.09

 pKOH1

0.67

0.67

− 0.67

− 0.67

1.00

− 0.76

− 0.80

− 0.84

0.72

− 0.52

− 0.23

 Vvdw

 0.90

 1.00

0.90

1.00

− 0.67

1.00

0.99

0.84

− 0.69

0.65

− 0.13

 M

 0.90

 1.00

0.90

1.00

− 0.67

1.00

1.00

0.90

− 0.73

0.69

− 0.09

 z

− 0.70

 0.90

0.70

0.90

− 0.82

0.90

0.90

1.00

− 0.78

0.75

0.07

 Kd1

0.30

0.60

− 0.30

− 0.60

0.36

− 0.60

− 0.60

− 0.70

1.00

− 0.19

− 0.60

 csat

− 0.70

 0.90

0.70

0.90

− 0.41

0.90

0.90

0.80

− 0.50

1.00

− 0.56

 KL

0.40

0.30

− 0.40

− 0.30

0.05

− 0.30

− 0.30

− 0.10

− 0.50

− 0.50

1.00

  1. Coefficients emphases indicate significances (italic: 0.001, bold italic: 0.01, bold: 0.05). Parameter as in Tables 8 and 9