Kinetic parameters for orthophosphate adsorption by hydrochars.

Kinetic parameters		pH 3			pH 5			pH 8
		HC	PRHC	POHC	HC	PRHC	POHC	HC	PRHC	POHC
Pseudo-first order	R 2	0.7637	0.6899	0.5476	0.7122	0.6374	0.6256	0.8035	0.7291	0.6551
	K 1 (min−1)	0.0004	0.0004	0.0004	0.0004	0.0004	0.0006	0.0004	0.0004	0.0004
Pseudo-second order	R 2	0.7489	0.7157	0.7049	0.7377	0.7126	0.7335	0.7506	0.7247	0.6961
	K 2 (g mg−1 min−1)	0.0610	0.0999	0.1031	0.0716	0.1137	0.1750	0.0480	0.0762	0.0970
Elovich	R 2	0.7612	0.7488	0.7038	0.7456	0.7373	0.7038	0.7634	0.7591	0.7351
	α (mg g−1 min−1)	55.6626	68.9872	68.8631	59.4897	71.4767	80.7558	51.6533	62.1344	70.0282
	β (mg g−1)	1.2116	1.0164	0.9705	1.1381	0.9649	0.8445	1.3152	1.1163	1.0134
Intraparticle	R 2	0.7443	0.7372	0.6718	0.7295	0.7202	0.7365	0.7497	0.7422	0.7206
	K i (mg g−1 h0.5)	0.288	0.3892	0.3222	0.3106	0.3833	0.4146	0.2743	0.3373	0.3973