Table 1 Factors and levels in Plackett-Burman statistical design affecting myco-synthesis of iron oxide nanoparticles.

From: Nano-bioremediation of metal-polluted industrial wastewater using myco-synthesized iron oxide nanoparticles derived from Aspergillus niger AUMC 16028

Variables

Unit

Level

Low (−)

High (+)

Culture age

(days)

5

9

Culture temperature

⁰C

25

35 °C

Culture pH

5

8

 Yeast extract

g/L

0

5

 Inoculum size

disk

1

2

 Biomass contact time

day

1

3

 Reaction time

h

24

48

 Reaction temperature

⁰C

25

35

Reaction pH

5

8

 Fe3+

mM

1

3

 Reaction shaking

rpm

0

150

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