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Table 1 Range of codes used in the Box?Behnken design for variables and their real experimental values

From: Adsorptive removal of levofloxacin and antibiotic resistance genes from hospital wastewater by nano-zero-valent iron and nano-copper using kinetic studies and response surface methodology

Code

Variables

pH

Initial concentration

Time (minute)

Dosage

-1

3

2

15

0.01

0

6

5

40

0.03

1

9

8

65

0.04