Adsorption 2 Anionic dye Azo dyes 1 Bed height 1 Breakthrough time 1 Cationic surfactant 1 Cationic surfactants 1 Cationics 1 Citrus fruits 1 Coprecipitation method 1 Dye removal from aqueous solutions 1 Dyes 1 Fixed bed column 1 Fixed bed columns 1 GO-LDH 1 Graphene 1 Graphene oxide-layered-double hydroxide 1 Graphene oxides 1 Ion exchange 1 LDH 1 Layered-double hydroxides 1 Mengkuang leaves 1 Methyl orange dyes 1 Reactive Orange 16 1 Reactive Orange 16 dye 1 Reactive orange 16 dye 1 Recycling 1 Reusability 1 Scanning electron microscopy 1 Sodium hydroxide 1