Removal of Pb(II) from Aqueous Solutions with Manganese Oxide-Modified Diatomite

Table 2

Kinetic parameters of Pb(II) adsorption on Mn/diatomite at different initial concentrations of Pb(II) solutions.

Initial Pb(II) concentration (mg L^-1)	(mg g^-1)	Pseudo-first-order			Pseudo-second-order
		(min^-1)	(mg g^-1)	RMSE	(g mg^-1 min^-1)	(mg g^-1)	RMSE
31.8	31.5	0.2321	31.1	0.334	0.0272	31.7	0.208
57.6	52.2	0.1085	49.2	1.724	0.0038	52.4	0.689
91.4	74.4	0.1149	68.4	3.113	0.0029	72.8	1.497
115.5	77.9	0.1561	73.1	3.408	0.0041	76.8	1.500
145.1	88.2	0.2037	84.4	2.877	0.0059	87.3	1.373
188.3	90.3	0.1809	86.5	3.150	0.0046	90.0	1.211