Novel manganese and nitrogen co-doped biochar based on sodium bicarbonate activation for efficient removal of bisphenol A: Mechanism insight and role analysis of manganese and nitrogen by combination of characterizations, experiments and density functional theory calculations,Bioresource Technology

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Novel manganese and nitrogen co-doped biochar based on sodium bicarbonate activation for efficient removal of bisphenol A: Mechanism insight and role analysis of manganese and nitrogen by combination of characterizations, experiments and density functional theory calculations
Bioresource Technology ( IF 9.7 ) Pub Date : 2024-03-17 , DOI: 10.1016/j.biortech.2024.130608
Wenlong Wu ₁ , Jinwei Zhang ₂ , Weijie Zhu ₂ , Shouhui Zhao ₂ , Yuchen Gao ₂ , Yan Li ₃ , Lei Ding ₃ , Heng Ding ₂

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A novel porous manganese and nitrogen co-doped biochar (Mn-N@SBC) was synthesized via one-step pyrolysis, utilizing loofah agricultural waste as the precursor and NaHCO as the activator. The behavior of bisphenol A adsorbed on Mn-N@SBC was evaluated using static batch adsorption experiments. Compared to direct manganese-nitrogen co-doping, co-doping based on NaHCO activation significantly increased the specific surface area (231 to 1027 m·g) and adsorption capacity (15 to 351 mg·g). Wide pH (2–10) and good resistance to cation/anion, humic acid and actual water demonstrated the robust adaptability of Mn-N@SBC to environmental factors. The significantly reduced specific surface area after adsorption, adverse effects of ethanol and phenanthrene on the removal of bisphenol A, and theoretically predicted interaction sites indicated the primary adsorption mechanisms involved pore filling, hydrophobicity, and π-π-electron-donor–acceptor interaction. This work presented an approach to create high-efficiency adsorbents from agricultural waste, offering theoretical and practical guidance for the removal of pollutants.

中文翻译：

基于碳酸氢钠活化的新型锰氮共掺杂生物炭有效去除双酚A：结合表征、实验和密度泛函理论计算对锰和氮的机理洞察和作用分析

以丝瓜农业废弃物为前驱体，NaHCO3为活化剂，通过一步热解合成了一种新型多孔锰氮共掺杂生物炭（Mn-N@SBC）。使用静态批量吸附实验评估双酚 A 在 Mn-N@SBC 上的吸附行为。与直接锰氮共掺杂相比，基于NaHCO活化的共掺杂显着增加了比表面积（231至1027 m·g）和吸附容量（15至351 mg·g）。宽pH值（2-10）和对阳离子/阴离子、腐殖酸和实际水的良好抵抗力证明了Mn-N@SBC对环境因素的强大适应性。吸附后比表面积显着降低、乙醇和菲对双酚 A 去除的不利影响以及理论上预测的相互作用位点表明主要吸附机制涉及孔填充、疏水性和 π-π-电子供体-受体相互作用。这项工作提出了一种从农业废物中制备高效吸附剂的方法，为污染物的去除提供了理论和实践指导。

更新日期：2024-03-17

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