Assessment of Novel Synthetized Nanozirconium Tungstovanadate as Cation Exchanger for Lead Ion Decontamination

Table 4

Effect of temperature on the ion exchange capacity of Zr(IV) tungstovanadate on heating time for 1 h.

Heating temperature (°C)	Appearance	IEC for Na^+ ion (mequiv.g^−1)	% loss in IEC
50	Yellow	2.5	0
100	Yellow	2.45	2
200	Yellow	2.39	4.4
400	Yellow	2.25	10
500	Dark yellow	2.15	16
600	Dark yellow	1.8	28
700	Greenish yellow	1.6	36