Sample Pg Dye concentration of the test solution at different time intervals (×10-4 mol L-1) 1 h 2 h 3 h 4 h 5 h 6 h 7 h H. sabdariffa raw 4.96 4.38 4.08 4.08 3.79 3.21 3.21 Hs-g-poly(EA) 117.3 5.84 5.84 5.54 5.54 5.54 5.54 5.54 H-g-ply(EA-co-AN) 175.10 5.84 5.54 5.54 5.54 5.54 5.54 5.54 Hs-g-ply(EA-co-MA) 179.96 5.54 5.54 5.54 5.54 5.54 5.54 5.54

Table 6: Dye uptake studies of the graft copolymers vis-a-vis back bone.

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