Green Synthesis of S- and N-Codoped Carbon Nanospheres and Application as Adsorbent of Pb (II) from Aqueous Solution

Table 2

The statistical roughness coefficients of prepared samples.

Amplitude factors	CNs	N-CNs	S-CNs
Ra (nm)	0.9	0.55	0.65
Rq	1.06	0.65	0.76
Rsk	−0.14	−0.33	−0.26
Rku	1.99	2.01	1.9
Thickness (nm)	4.00	2.39	2.87