No of days (d) DR19 495nm) DR19+ DB9 (λ460nm)
I-PGP I-PGP
10 88.5 74.5
20 85.6 73.6
30 77.4 69.5
40 77.8 68.5
50 69.4 51.4
60 50.5 43.4
Table 4: Continuous removal of dye colour in a vertical bed reactor. Dye / dye mixture were independently passed through the reactor (15 × 2 cm) filled with I-PGP (1500 U) at room temperature continuously. Samples from the column outlet were collected and after centrifugation were analyzed spectrophotometrically for the dye colour removal.