Performance evaluation of polyaniline modified phosphorylated cotton as promising adsorbent for Pb (II) ions removal

Abstract

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).

04. Recent techniques of surface modification for textile fabrics

“…The modified phosphorylated cotton fabric had a higher adsorption capacity (250 mg g-1) than the unmodified cotton fabric (54 mg g-1) and the polyaniline-modified cotton fabric (113.7 mg g-1). [5] Eman et al studied the graft copolymerization of Hydroxyethyl cellulose (HEC) by acrylic acid (AA) or by acrylic acid and acrylamide (AM) mixture with different composition ratio AA/AM (70/30 & 30/70) then the produced copolymer utilized to remove the ion Ni from aqueous solutions the result show that at optimum conditions of metal removal the removal efficiency of Ni ion follows the sequence: HEC-g-AA (I) >HEC-g-AA-Am (II) > HEC-g-AA-Am (III) with value of removal efficiency 94.6%, 91.2%and 86.1% respectively. [6] Wool fabrics were modified with chitosan and chitosan nanoparticles (1%, 2%, 3%) with synthesized direct dye to enhance the exhaustion of dye, fastness properties, and antimicrobial activity of dyed fabrics.…”

“…It will be utilized to improve the quality of textile products through fabric preparation, dyeing, and finishing techniques. Cleaning, activation, grafting, and deposition are the four processes that plasma processes can conveniently be divided into, as shown in figure (5). [23] The protective coatings applied on to the textiles through plasma technology make the textiles more durable.…”