Table 1 Chemical structures of the studied dyes and their physical characteristics: (a) RB198, (b) DY50, (c) NBB and (d) MB.

From: Dimethyl diallyl ammonium chloride and diallylamin Co-polymer modified bio-film derived from palm dates for the adsorption of dyes

Reactive Blue 198 (RB198) λmax = 595 nm Molecular weight (g/mol) = 882.19

Direct Yellow 50 (DY50) λmax = 390 nm Molecular weight (g/mol) = 952.81

Naphtol blue Black (NBB) λmax = 610 nm Molecular weight (g/mol) = 616.49

Methylene Blue (MB) λmax = 664 nm Molecular weight (g/mol) = 319.85

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