In this article, phosphorylated cotton fabric was modified with polyaniline using in‐situ chemical solution polymerization to produce conducting fabric. The modified fabric was characterized using Fourier transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), and scanning electron microscopy (SEM). In addition, the surface electrical resistivity was measured where the modified fabric recorded electrical resistivity of 9.02 kΩ, compared to more than 1000 MΩ for untreated cotton fabrics. The efficiency of the modified fabric in the removal of Pb2+ ions from an aqueous solution was investigated. The phosphorylated cotton fabric modified with polyaniline (C‐Ph‐PANI) exhibited the highest adsorption capacity (250 mg g−1) compared to 54 mg g−1 for the unmodified cotton fabric and 113.7 mg g−1 for cotton fabric modified with polyaniline. The impact of pH, adsorbent amount, adsorbate concentration, and contact time on Pb2+ ions adsorption capacity was also investigated. The adsorption mechanism of Pb2+ ions by C‐Ph‐PANI was studied using Langmuir and Freundlich isotherms. It was found that, the adsorption isotherm obeyed the Langmuir model (monolayer adsorption) with a higher R2 value (0.979) more than the Freundlich model (multilayer adsorption) which recorded a lower R2 value (0.904).
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