Sample Pg Dye concentration of the test solution at different time intervals (x 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-BA) 112.2 5.84 5.54 5.54 5.54 5.54 5.54 5.54 Hs-g-ply(EA-co-VA) 36.1 5.84 5.54 3.79 3.79 3.79 3.79 3.79

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