Table 3. Maximum Adsorption Capacities (q_m) for Pb(II) by Some Adsorbents.

adsorbent	qm (mg/g)	refs
ECAA	219.3	(2)
AC	58.00	(9)
CMC/PAM	312.5	(12)
FMMS	223.2	(13)
Fe3O4/LDH-AM	266.6	(14)
MNPs	188.7	(16)
EDCMS	123.5	(17)
Fe3O4-P(Cys/HEA)	38.69	(19)
LLDPE-g-PAA-co-starch/OMMT	430.0	(22)
M-PAM-HA	174.9	(23)
P(AANa-co-AM)/GO	452.3	(25)
Fe3O4@SiO2@P(AANa-co-AM)	237.53	this work