Optimized Synthesis of FeS Nanoparticles with a High Cr(VI) Removal Capability

Table 1

OA₉(3⁴) matrix for parameter optimization in the synthesis of FeS nanoparticles and DLS particle sizes (hydrodynamic diameter).

Run number	Factor				Hydrodynamic diameter (nm)
	CMC (w/w)	Oscillation (rpm)	Titration (mL/s)	Na2S (M)
1	0.05%	200	0.05	0.0426	186.9
2	0.05%	100	0.01	0.0213	258.8
3	0.05%	250	0.15	0.0639	139.2
4	0.1%	100	0.05	0.0639	171.5
5	0.1%	250	0.01	0.0426	151.3
6	0.1%	200	0.15	0.0213	47.39
7	0.2%	250	0.05	0.0213	25.84
8	0.2%	200	0.01	0.0639	127.4
9	0.2%	100	0.15	0.0426	108.5