Scholarlink

<p>A highly efficient magnetic bio-composite (Fe<sub>3</sub>O<sub>4</sub>/BC) was successfully synthesized and characterized for the removal of toxic Congo Red (CR) azo dye from industrial wastewater solutions. The adsorbent was prepared by activated carbon derived from biochar (BC) with magnetic iron oxide (Fe<sub>3</sub>O<sub>4</sub>) nanoparticles via a co-precipitation method. Synthesis of magnetic biochar composites (Fe<sub>3</sub>O<sub>4</sub>/BC) nanoparticles measured between 30 and 80&#xa0;nm for the removal of Congo Red dye. Comprehensive characterization of the Fe<sub>3</sub>O<sub>4</sub>/BC composite, including XRD, FTIR, TGA-DTA, VSM, TEM, AFM, FESEM, and SEM, confirmed the successful integration and magnetic properties of the nanomaterial. Batch adsorption experiments established the optimum parameters at pH 5.0 and 35&#xa0;°C, achieving equilibrium within 60&#xa0;min. The influence of surfactants, metal ions, and salts demonstrated the composite’s robustness in complex matrices. The kinetic analysis strongly followed the pseudo-second-order model (R<sup>2</sup> &gt; 0.99), suggesting chemisorption is the rate-limiting step. Isotherm studies indicated a good fit to both the Langmuir and Temkin models, yielding a maximum adsorption capacity (q<sub>max</sub>) of 798.15&#xa0;mg/g. Thermodynamic analysis confirmed the biosorption process as endothermic and spontaneous (ΔG° &lt; 0). This study confirms that the Fe<sub>3</sub>O<sub>4</sub>/BC was a magnetically recoverable bio-composite, which shows significant and higher adsorption capacity as a sustainable material for better industrial 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

Cost-effective adsorptive removal of Congo red azo dye from industrial effluents using magnetic biochar-derived activated carbon

  • 期刊论文

  • 发表日期：

    2026年5月21日

查看全文
  • Hari Mohan Meena,
  • Shrikant Kukreti,
  • Rajendra Kumar Bairwa,
  • Srinivas Tadepalli

摘要

A highly efficient magnetic bio-composite (Fe3O4/BC) was successfully synthesized and characterized for the removal of toxic Congo Red (CR) azo dye from industrial wastewater solutions. The adsorbent was prepared by activated carbon derived from biochar (BC) with magnetic iron oxide (Fe3O4) nanoparticles via a co-precipitation method. Synthesis of magnetic biochar composites (Fe3O4/BC) nanoparticles measured between 30 and 80 nm for the removal of Congo Red dye. Comprehensive characterization of the Fe3O4/BC composite, including XRD, FTIR, TGA-DTA, VSM, TEM, AFM, FESEM, and SEM, confirmed the successful integration and magnetic properties of the nanomaterial. Batch adsorption experiments established the optimum parameters at pH 5.0 and 35 °C, achieving equilibrium within 60 min. The influence of surfactants, metal ions, and salts demonstrated the composite’s robustness in complex matrices. The kinetic analysis strongly followed the pseudo-second-order model (R2 > 0.99), suggesting chemisorption is the rate-limiting step. Isotherm studies indicated a good fit to both the Langmuir and Temkin models, yielding a maximum adsorption capacity (qmax) of 798.15 mg/g. Thermodynamic analysis confirmed the biosorption process as endothermic and spontaneous (ΔG° < 0). This study confirms that the Fe3O4/BC was a magnetically recoverable bio-composite, which shows significant and higher adsorption capacity as a sustainable material for better industrial wastewater treatment.