Scholarlink

<p>The present research outlines a procedure for the treatment of municipal wastewater by utilizing reduced graphene oxide/Fe<sub>3</sub>O<sub>4</sub> (rGO@Fe<sub>3</sub>O<sub>4</sub>) magnetic nanocomposites to effectively remove hexavalent chromium through adsorption process. rGO@Fe<sub>3</sub>O<sub>4</sub> nanocomposites were synthesized through a conventional procedure and applied for Cr (VI) removal from wastewater. The nanocomposites were characterized using techniques including Fourier Transform Infrared Spectroscopy, X-Ray Diffraction Analysis, Scanning Electron Microscopy, Brunauer–Emmett–Teller surface area analysis, and Raman spectroscopy. The batch adsorption process was optimized by conducting response surface methods for assessing primary variables affecting the adsorption process. Adsorption equilibrium mechanism was analyzed through the application of Langmuir and Freundlich isotherm models, utilizing both linear and nonlinear regression approaches. Furthermore, multiple error functions were employed to assess the validity of models. Results revealed that adsorption mechanism exhibited heterogeneous adsorption, aligning well with the Freundlich isotherm model, which accurately corresponded to experimental data. Moreover, the sorption kinetics were well described by the pseudo-second order kinetic model. The results obtained indicated that adsorption of Cr(VI) onto surface of rGO@Fe<sub>3</sub>O<sub>4</sub> nanocomposites is affected by multi-site interactions. The correlation between experimental data and isotherm models further supports the suitability of this material in environmental remediation, offering a promising approach for sustainable wastewater treatment.</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

Study of linear and nonlinear isotherm and kinetic parameters of hexavalent chromium adsorption onto reduced graphene oxide coated iron oxide

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月12日

查看全文
  • Selim Gürsoy,
  • Nagehan Kübra Zeytinci,
  • Buse Tuğba Zaman,
  • Sezgin Bakırdere,
  • Elif Öztürk Er

摘要

The present research outlines a procedure for the treatment of municipal wastewater by utilizing reduced graphene oxide/Fe3O4 (rGO@Fe3O4) magnetic nanocomposites to effectively remove hexavalent chromium through adsorption process. rGO@Fe3O4 nanocomposites were synthesized through a conventional procedure and applied for Cr (VI) removal from wastewater. The nanocomposites were characterized using techniques including Fourier Transform Infrared Spectroscopy, X-Ray Diffraction Analysis, Scanning Electron Microscopy, Brunauer–Emmett–Teller surface area analysis, and Raman spectroscopy. The batch adsorption process was optimized by conducting response surface methods for assessing primary variables affecting the adsorption process. Adsorption equilibrium mechanism was analyzed through the application of Langmuir and Freundlich isotherm models, utilizing both linear and nonlinear regression approaches. Furthermore, multiple error functions were employed to assess the validity of models. Results revealed that adsorption mechanism exhibited heterogeneous adsorption, aligning well with the Freundlich isotherm model, which accurately corresponded to experimental data. Moreover, the sorption kinetics were well described by the pseudo-second order kinetic model. The results obtained indicated that adsorption of Cr(VI) onto surface of rGO@Fe3O4 nanocomposites is affected by multi-site interactions. The correlation between experimental data and isotherm models further supports the suitability of this material in environmental remediation, offering a promising approach for sustainable wastewater treatment.