The copolymer resin was synthesized by the condensation polymerization involving monomers like 8-hydroxyquinoline 5-sulphonic acid (0.2 mol) and thiosemicarbazide (0.1 mol) with formaldehyde (0.3 mol) in 2:1:3 ratio using 2M HCl as reaction medium for 6 h at 130 °C. The reaction mixture was then cooled and poured into crushed ice with constant stirring and left overnight. The crimson red coloured resin was obtained and washed with warm water, methanol and acetone followed by filtration to remove unreacted monomers and impurities. Finally, the copolymer resin was dried in an air oven at 75 °C for 24 h. The yield of the copolymer was found to be 82%. The copolymer was found to be soluble in solvents like dimethylsulphoxide (DMSO), dimethylformamide (DMF) and tetrahydrofuran (THF). and partially soluble in mineral acids. The novel copolymer/activated charcoal composite was prepared by 8-HQTSF copolymer and activated charcoal in 1:2 ratio. The copolymer was dissolved in 25 mL of DMSO and the activated charcoal was added into it and the mixture was subjected to ultrasonication for 3 h with constant stirring for 24 h at room temperature. After the specific time, the obtained polymer composite was separated, filtered and dried at 70°C for 24 h.