Table 1 The experimental range and levels of input process variables assessed.

From: Preparation and characterization of low-cost adsorbents for the efficient removal of malachite green using response surface modeling and reusability studies

Variables

Code

Levels

− 1

0

1

pH

A

5

7

9

Dye concentration (mg/l)

B

5

50

100

Temperature (°C)

C

30

35

40

Dosage (g/l)

D

2.0

4.0

6.0

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