Removal of Ammonium from Aqueous Solutions Using Zeolite Synthesized from Electrolytic Manganese Residue

Table 3

Comparison of maximum adsorption capacity of ammonium on various zeolites.

Adsorbent	Maximum adsorption capacity (mg/g)	Reference
EMRZ	31.08∼32.88	This work
Natural Chinese zeolite	5.87∼6.02	[52]
Natural Chinese clinoptilolite	10.53	[53]
Natural Iranian zeolite	8.51–10.39	[42]
Natural Iranian zeolite	43.47	[54]
Pretreated natural zeolites	32.73	[55]
NaCl-modified zeolite	14.26	[48]
NaOH-activated zeolite	21.2	[46]
Natural Turkish zeolite	5.76–7.36	[56]
Rice husk ash-synthesized zeolite	42.37	[25]
Fly ash derived zeolite	18.19	[57]
Fly ash derived zeolite	3.94	[58]