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

Table 1

Experimental conditions were carried out during the preparation of the Mn/diatomite samples.

Sample	Mass of diatomite (g)	Mass of KMnO4 (g)	10 M HCl volume (mL)	KMnO4/HCl molar ratio	Hydrothermal temperature (°C)	Hydrothermal time (h)
1	0.5	0.79	4	1 : 8	80	16
2	0.5	0.79	4	1 : 8	120	16
3	0.5	0.79	4	1 : 8	160	16
4	0.5	0.79	0.5	1 : 1	80	16
5	0.5	0.79	1	1 : 2	80	16
6	0.5	0.79	2	1 : 4	80	16
7	0.5	0.79	2	1 : 4	80	24
8	0.5	0.79	2	1 : 4	80	48