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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