Table 4.

A comparison of the adsorption capacity of functionalized ECNFs with the other carbon nanomaterials.

Adsorbent	Adsorption capacity qmax (mg/g)	Condition	Ref.
CNTs	102	pH 5, time = 80 min	51
MWCNTs@SiO2-NH2	147	pH 7, Co = 250 mg/L, T = 30 °C, time = 24 h	52
Oxidized MWCNTs	117.64	pH 7, Co = 1200 mg/L, T = 25 °C	53
CNF-CoFe2O4	42.9	pH 4, Co = 100 mg/L, T = 25 °C, time = 180 min	54
GO aerogels	158.7	pH 5.5, Co = 100 mg/L,	55
magnetic chitosan@GO	76.94	pH 5, T = 30 °C	56
GO/L-Trp	222	pH 4, Co = 250 mg/L, T = 20 °C, time = 40 min	57
ECNFs	105	pH 5.5, Co = 200 mg/L, T = 25 °C, time = 180 min	This work
oxidized ECNFs	243	pH 5.5, Co = 200 mg/L, T = 25 °C, time = 60 min	This work
melam-ECNFs	367.5	pH 5.5, Co = 200 mg/L, T = 25 °C, time = 60 min	This work
PmPDA-ECNFs	354.5	pH 5.5, Co = 200 mg/L, T = 25 °C, time = 60 min	This work