Scholarlink

<p>Lead contamination remains a critical environmental and public health concern, demanding efficient and sustainable treatment strategies. In this study, a chitosan-modified g-C<sub>3</sub>N<sub>4</sub> nanocomposite (1CS/2&#xa0;g-C<sub>3</sub>N<sub>4</sub>) was synthesized and evaluated for Pb<sup>2+</sup> removal from aqueous solutions. Structural and morphological characterizations confirmed the formation of a stable nanostructure with high surface area, uniform morphology, and enhanced adsorption affinity. Thermodynamic analysis indicated that the adsorption process is exothermic (ΔH° = –21.481&#xa0;kJ/mol) and favorable at low temperatures, while kinetic studies revealed pseudo-second-order behavior. The equilibrium data were best fitted to the Langmuir isotherm, with a maximum adsorption capacity of 14.14&#xa0;mg/g. Under optimal conditions, the nanocomposite achieved a Pb<sup>2+</sup> removal efficiency of 51.82%, nearly three times higher than pristine g-C<sub>3</sub>N<sub>4</sub>. In addition, the material demonstrated broad-spectrum adsorption capability for other heavy metals (Cu<sup>2+</sup>, Cd<sup>2+</sup>, Ni<sup>2+</sup>, Fe<sup>3+</sup>) and organic pollutants (dyes and antibiotics), highlighting its durability, stability, and potential as a versatile adsorbent for practical wastewater treatment and environmental remediation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Novel chitosan/g-C3N4 nanocomposite for Pb(II) removal: facile synthesis, adsorption mechanism, and environmental applications

  • 期刊论文

  • 发表日期：

    2026年2月13日

查看全文
  • Quang Minh Pham,
  • Thu Huong Nguyen,
  • Manh Khai Nguyen,
  • Minh Trang Hoang,
  • Hoang Giang Pham,
  • Anh-Tuan Vu

摘要

Lead contamination remains a critical environmental and public health concern, demanding efficient and sustainable treatment strategies. In this study, a chitosan-modified g-C3N4 nanocomposite (1CS/2 g-C3N4) was synthesized and evaluated for Pb2+ removal from aqueous solutions. Structural and morphological characterizations confirmed the formation of a stable nanostructure with high surface area, uniform morphology, and enhanced adsorption affinity. Thermodynamic analysis indicated that the adsorption process is exothermic (ΔH° = –21.481 kJ/mol) and favorable at low temperatures, while kinetic studies revealed pseudo-second-order behavior. The equilibrium data were best fitted to the Langmuir isotherm, with a maximum adsorption capacity of 14.14 mg/g. Under optimal conditions, the nanocomposite achieved a Pb2+ removal efficiency of 51.82%, nearly three times higher than pristine g-C3N4. In addition, the material demonstrated broad-spectrum adsorption capability for other heavy metals (Cu2+, Cd2+, Ni2+, Fe3+) and organic pollutants (dyes and antibiotics), highlighting its durability, stability, and potential as a versatile adsorbent for practical wastewater treatment and environmental remediation.