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Enhanced Adsorptivity of Hexavalent Chromium in Aqueous Solutions Using CTS@nZVI Modified Wheat Straw-Derived Porous Carbon.
Deng, Tiantian; Li, Hansheng; Ding, Su; Chen, Feng; Fu, Jingbao; Zhao, Junwei.
Afiliación
  • Deng T; School of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, China.
  • Li H; School of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, China.
  • Ding S; Faculty of Health Sciences, University of Technology MARA, Puncak Alam Campus, Puncak Alam 42300, Malaysia.
  • Chen F; School of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, China.
  • Fu J; School of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, China.
  • Zhao J; School of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, China.
Nanomaterials (Basel) ; 14(11)2024 Jun 03.
Article en En | MEDLINE | ID: mdl-38869598
ABSTRACT
Using KOH-modified wheat straw as the precursor, wheat straw biochar was produced through carbonization at 500 °C. Subsequently, a synthetic material containing nano-zero-valent iron (nZVI) was prepared via liquid phase reduction (nZVI-WSPC). To enhance its properties, chitosan (CTS) was used by crosslinking to form the new adsorbent named CTS@nZVI-WSPC. The impact of CTS on parameters such as mass ratio, initial pH value, and adsorbent dosage on the adsorption efficiency of Cr(VI) in solution was investigated through one-factor experiments. Isotherm adsorption and thermodynamic analysis demonstrated that the adsorption of Cr(VI) by CTS@nZVI-WSPC conforms to the Langmuir model, with a maximum adsorption capacity of 147.93 mg/g, and the adsorption process is endothermic. Kinetic analysis revealed that the adsorption process follows a pseudo-second-order kinetic model. The adsorption mechanism, as elucidated by SEM, FTIR, XPS, and XRD, suggests that the process may involve multiple mechanisms, including pore adsorption, electrostatic adsorption, chemical reduction, and surface chelation. The adsorption capacity of Cr(VI) by CTS@nZVI-WSPC remains high after five cycles. The adsorbent is simple to operate, economical, efficient, and reusable, making it a promising candidate for the treatment of Cr(VI) in water.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanomaterials (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanomaterials (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza