Kinetics parameters for phosphate adsorption of the intraparticle diffusion model.

Adsorbent	First stage			Second stage			Third stage
	k 1 (g mg−1 h0.5)	C 1 (mg g−1)	R 2	k 2 (g mg−1 h0.5)	C 2 (mg g−1)	R 2	k 3 (g mg−1 h0.5)	C 3 (mg g−1)	R 2
ZEO@AZ	43.8987	−5.5008	0.9999	8.8870	9.5535	0.9172	0.4622	21.1805	0.9152
ZEO@CZ	40.5107	−5.8701	0.9538	2.5603	10.0720	0.9929	0.2599	13.1927	0.9621
AZ	12.0002	−1.4451	0.9992	0.9448	3.0964	0.9635	0.0653	4.7872	0.9682
ZEO	11.4777	0.5933	0.9985	2.4181	5.8696	0.9685	0.1367	9.1174	0.8952