Table 1 CCD design for input variables.

From: RSM optimization and morphological investigation of bismuth ferrite for photodegradation of organic pollutant under visible light

Factor

Unit

Levels

−2

−1

0

1

2

Catalyst amount

mg

5

10

15

20

25

pH

-

2

4

6

8

10

Concentration MB

mg/l

5

10

15

20

25

LED lamp power

W

50

100

150

200

250

Time

min

20

40

60

80

100

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