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<p>A novel biopolymer-based nanocomposite, crosslinked chitosan-tartaric acid with multi-walled carbon nanotubes (CHS-TA/MWCNT), was developed and investigated for its capacity to remove cationic organic dye (Basic Red 2, BR2). The structural and surface characteristics of the CHS-TA/MWCNT nanocomposite were comprehensively analyzed using scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), point of zero charge (pH<sub>pzc</sub>), and energy-dispersive X-ray spectroscopy (EDS). The CHS-TA/MWCNT material exhibited a specific surface area of 25.0 m<sup>2</sup>/g, with a mean pore diameter of 16.72 nm and a total pore volume of 0.1046 cm<sup>3</sup>/g. To optimize the uptake of BR2 dye, response surface methodology coupled with Box-Behnken design (RSM-BBD) was adopted to assess the effects of key variables. Equilibrium data fit well to the Temkin model, while kinetic studies followed a pseudo-first-order model. The experimental adsorption capacity was determined to be 216.05 mg/g. These results confirm the potential of CHS-TA/MWCNT polymeric adsorbents as a sustainable and efficient bioadsorbent for the treatment of dye-laden industrial wastewater.</p>

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Crosslinked chitosan-tartaric acid composited with multi-walled carbon nanotubes for efficient removal of cationic organic dye: characterization and adsorption modeling

  • 期刊论文

  • 发表日期：

    2026年3月27日

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  • Ahmed Saud Abdulhameed,
  • Rima Heider Al Omari,
  • Mohammed Al-Yaari,
  • Mahmoud Abualhaija,
  • Sameer Algburi

摘要

A novel biopolymer-based nanocomposite, crosslinked chitosan-tartaric acid with multi-walled carbon nanotubes (CHS-TA/MWCNT), was developed and investigated for its capacity to remove cationic organic dye (Basic Red 2, BR2). The structural and surface characteristics of the CHS-TA/MWCNT nanocomposite were comprehensively analyzed using scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), point of zero charge (pHpzc), and energy-dispersive X-ray spectroscopy (EDS). The CHS-TA/MWCNT material exhibited a specific surface area of 25.0 m2/g, with a mean pore diameter of 16.72 nm and a total pore volume of 0.1046 cm3/g. To optimize the uptake of BR2 dye, response surface methodology coupled with Box-Behnken design (RSM-BBD) was adopted to assess the effects of key variables. Equilibrium data fit well to the Temkin model, while kinetic studies followed a pseudo-first-order model. The experimental adsorption capacity was determined to be 216.05 mg/g. These results confirm the potential of CHS-TA/MWCNT polymeric adsorbents as a sustainable and efficient bioadsorbent for the treatment of dye-laden industrial wastewater.