Scholarlink

<p>This work reports novel carbon embedded green mesoporous magnetite nanocomposite (Fe<sub>3</sub>O<sub>4</sub>@MBC NCs) from mango-leaf biowaste via an eco-friendly, cost-effective, and straightforward biogenic fabrication approach. Multiple approaches, including UV–Vis, XRD, Raman spectrometer, FTIR, VSM, SEM, EDX, BET, TEM, VSM, DLS/Zetasizer, and TGA-DTA, were employed in characterisation. The applicability of Fe<sub>3</sub>O<sub>4</sub>@MBC NCs as a cost-effective nanoadsorbent was extensively examined for the sequestration of toxic metals [Cd(II), Ni(II), and Zn(II)] from synthetic solutions in batch mode experiments. The BET-specific surface area of Fe<sub>3</sub>O<sub>4</sub>@MBC was calculated to be 32.16 m<sup>2</sup>/g, along with the BJH pore diameter of 7.07 nm, exhibiting mesoporosity. The irregularly spherical magnetite nanoparticles capped with phytochemicals from mango-leaf biowaste existed both interstitially and on the surface of carbon derived from biowaste. The Fe<sub>3</sub>O<sub>4</sub>@MBC sample demonstrates soft ferromagnetism characteristics and a superior saturation magnetisation of 29.03 emu/g. Among the simulation models applied, kinetics data for Cd(II), Ni(II), and Zn(II) were found to follow the pseudo second order and Elovich models, while the adsorption equilibrium data was well fitted with the Langmuir isotherm. The Langmuir-based monolayer adsorption capacities for Cd(II), Ni(II), and Zn(II) were 138.89, 112.36, and 107.53 mg/g, respectively. The ideal-fitted kinetics correctly identified chemisorption as the key rate-limiting step in the adsorption mechanism via carboxylate and hydroxyl moieties on the heterogeneous surface of Fe<sub>3</sub>O<sub>4</sub>@MBC NCs. The endothermic and feasible adsorption of toxic metal ions was observed, accompanied by enhanced randomness at higher temperatures. Cost estimation at the lab scale and exceptional sequestration of toxic metal ions with ≥ 82.55% regenerability across five magnetically retrieved recycles confirm the economic viability of fabricated nanoadsorbent. Finally, the effectiveness of Fe<sub>3</sub>O<sub>4</sub>@MBC in sequestering toxic cationic metals from electroplating wastewater supports the achievement of UN-2030, SDG 6, 8 and 14 in an eco-friendly and economically viable manner.</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

One-Pot Biogenic Fabrication of Novel Carbon Embedded Green Mesoporous Magnetite (Fe3O4@MBC) Nanocomposite from Mango-Leaf Biowaste: An Economical and Recyclable Nanoadsorbent for Improved Sequestration of Toxic Metal Ions from Synthetic and Electroplating Wastewater

  • 期刊论文

  • 发表日期：

    2025年10月18日

查看全文
  • Subhash Chander,
  • Asha Gupta

摘要

This work reports novel carbon embedded green mesoporous magnetite nanocomposite (Fe3O4@MBC NCs) from mango-leaf biowaste via an eco-friendly, cost-effective, and straightforward biogenic fabrication approach. Multiple approaches, including UV–Vis, XRD, Raman spectrometer, FTIR, VSM, SEM, EDX, BET, TEM, VSM, DLS/Zetasizer, and TGA-DTA, were employed in characterisation. The applicability of Fe3O4@MBC NCs as a cost-effective nanoadsorbent was extensively examined for the sequestration of toxic metals [Cd(II), Ni(II), and Zn(II)] from synthetic solutions in batch mode experiments. The BET-specific surface area of Fe3O4@MBC was calculated to be 32.16 m2/g, along with the BJH pore diameter of 7.07 nm, exhibiting mesoporosity. The irregularly spherical magnetite nanoparticles capped with phytochemicals from mango-leaf biowaste existed both interstitially and on the surface of carbon derived from biowaste. The Fe3O4@MBC sample demonstrates soft ferromagnetism characteristics and a superior saturation magnetisation of 29.03 emu/g. Among the simulation models applied, kinetics data for Cd(II), Ni(II), and Zn(II) were found to follow the pseudo second order and Elovich models, while the adsorption equilibrium data was well fitted with the Langmuir isotherm. The Langmuir-based monolayer adsorption capacities for Cd(II), Ni(II), and Zn(II) were 138.89, 112.36, and 107.53 mg/g, respectively. The ideal-fitted kinetics correctly identified chemisorption as the key rate-limiting step in the adsorption mechanism via carboxylate and hydroxyl moieties on the heterogeneous surface of Fe3O4@MBC NCs. The endothermic and feasible adsorption of toxic metal ions was observed, accompanied by enhanced randomness at higher temperatures. Cost estimation at the lab scale and exceptional sequestration of toxic metal ions with ≥ 82.55% regenerability across five magnetically retrieved recycles confirm the economic viability of fabricated nanoadsorbent. Finally, the effectiveness of Fe3O4@MBC in sequestering toxic cationic metals from electroplating wastewater supports the achievement of UN-2030, SDG 6, 8 and 14 in an eco-friendly and economically viable manner.