Table 5 List of constants calculated from different models.

From: Ultrahigh and kinetic-favorable adsorption for recycling urea using corncob-derived porous biochar

Langmuir

Freundlich

Harkins–Jura

Q (mg/g)

b (mg/L)

R2

Qf (mg/g)

n

R2

A

B

R2

2.36

399.54

0.96

105.58

3.80

0.93

302,913.70

3.77

0.98