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<p>Leveraging the significant potential of thiol-functionalized materials, this study pioneers the synthesis of a novel nanocomposite based on toluene-3,4-dithiol. The Mg-MPTMS/BBT/B nanocomposite was fabricated through a sequential strategy, initially constructing a thiol-modified magnesium phyllosilicate scaffold via 3-mercaptopropyltrimethoxysilane (MPTMS), followed by its functionalization with Balangu mucilage, toluene-3,4-dithiol, and isophthaloyl dichloride. Comprehensive characterization (XRD, BET, FT-IR, FESEM, TGA, TEM, EDS) confirmed the successful formation of the material's structure. Its efficacy was evaluated for the removal of toxic Pb<sup>2+</sup> and Hg<sup>2+</sup> ions, with process conditions optimized by Response Surface Methodology (RSM). The nanocomposite demonstrated exceptional adsorption capacities of 347.38&#xa0;mg/g for Pb<sup>2+</sup> (<i>pH</i> = 4, <i>t</i> = 42&#xa0;min, <i>C</i> = 60&#xa0;ppm, <i>D</i> = 0.002&#xa0;g) and 483.75&#xa0;mg/g for Hg<sup>2+</sup> (<i>pH</i> = 4, <i>t</i> = 62&#xa0;min, <i>C</i> = 50&#xa0;ppm, <i>D</i> = 0.002&#xa0;g). Adsorption behavior for Hg<sup>2+</sup> was best described by the Temkin isotherm, whereas Pb<sup>2+</sup> uptake followed the Langmuir model, indicating distinct removal mechanisms. Beyond its remarkable adsorption performance, the nanocomposite also functioned as an effective corrosion inhibitor for carbon steel in a 0.5&#xa0;M H<sub>2</sub>SO<sub>4</sub> environment, with inhibition efficiency escalating at higher concentrations. This work successfully presents a versatile, multifunctional material with dual capabilities in environmental remediation and corrosion protection.</p>

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Synthesis and Characterization of a Magnesium Organosilicate/Bis-benzothioate/Balangu Nanocomposite as a Multifunctional Material for Enhanced Heavy Metal Adsorption (Pb2+, Hg2+) and Corrosion Inhibition: Process Optimization via Response Surface Methodology

  • 期刊论文

  • 发表日期：

    2026年1月7日

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  • Mahsa Sedighpoor,
  • Samieh Fozooni,
  • Ahmad Momeni Tikdari,
  • Hooshang Hamidian,
  • Esmaeel Darezereshki

摘要

Leveraging the significant potential of thiol-functionalized materials, this study pioneers the synthesis of a novel nanocomposite based on toluene-3,4-dithiol. The Mg-MPTMS/BBT/B nanocomposite was fabricated through a sequential strategy, initially constructing a thiol-modified magnesium phyllosilicate scaffold via 3-mercaptopropyltrimethoxysilane (MPTMS), followed by its functionalization with Balangu mucilage, toluene-3,4-dithiol, and isophthaloyl dichloride. Comprehensive characterization (XRD, BET, FT-IR, FESEM, TGA, TEM, EDS) confirmed the successful formation of the material's structure. Its efficacy was evaluated for the removal of toxic Pb2+ and Hg2+ ions, with process conditions optimized by Response Surface Methodology (RSM). The nanocomposite demonstrated exceptional adsorption capacities of 347.38 mg/g for Pb2+ (pH = 4, t = 42 min, C = 60 ppm, D = 0.002 g) and 483.75 mg/g for Hg2+ (pH = 4, t = 62 min, C = 50 ppm, D = 0.002 g). Adsorption behavior for Hg2+ was best described by the Temkin isotherm, whereas Pb2+ uptake followed the Langmuir model, indicating distinct removal mechanisms. Beyond its remarkable adsorption performance, the nanocomposite also functioned as an effective corrosion inhibitor for carbon steel in a 0.5 M H2SO4 environment, with inhibition efficiency escalating at higher concentrations. This work successfully presents a versatile, multifunctional material with dual capabilities in environmental remediation and corrosion protection.