Table 1.

Parameters of the Langmuir equation and separation factors for the adsorption of humic acid on different adsorbents obtained at 37 °C.

Sample	K (L/mg)	q∞ (mg/g)	RL
Chitosan	1.01 × 10−2	3.33 × 103	4.74 × 10−3
DEAE-cellulose	1.21 × 10−1	2.13 × 102	1.92 × 10−2
Chitin	4.54 × 10−2	1.89 × 102	5.17 × 10−2
Active charcoal	2.49 × 10−2	1.54 × 102	6.26 × 10−2