Kinetic constants for HAP-MMT and HAP on fluoride adsorption.

		HAP-MMT	HAP
Experimental data	Q e (exp) mg g−1	14.92	7.32
Pseudo first order	k 1	−0.215	−0.208
	Q e (cal) (mg g−1)	127.673	21.409
	R 2	0.8817	0.7922
Pseudo second order	Q e (cal) mg g−1	15.08	7.51
	k 2 (gmg−1s)	0.014	0.020
	R 2	0.999	0.997
Intraparticle diffusion	K p (mg g−1 min−1/2)	2.5042	1.5546
	C	0.322	0.367
	R 2	0.7465	0.6560