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<p>Polycyclic aromatic hydrocarbons (PAHs) discharged through anthropogenic activities pose a threat to the environment. In this study, a nanocomposite material was successfully prepared by stacking nanoscale zerovalent iron (nZVI) onto biochar derived from aloe vera peels (AVP) to achieve efficient adsorptive removal of phenanthrene.The results of the batch study showed that at pH 7 and an nZVI-AVP dosage of 0.8&#xa0;g/L, the maximum removal efficiency of 96.25% was achieved after 40&#xa0;min of adsorption.Kinetic studies were conducted at various pH levels and phenanthrene concentrations.Batch studies confirmed that the <i>q</i><sub><i>e</i></sub> value estimated using the pseudo-second-order model best fits the data for phenanthrene removal by nZVI-AVP and closely agrees with the experimental values.Loading nZVI onto AVP enhances its performance and increases its capacity to sequester phenanthrene. The nZVI-AVP specifically adsorbed aromatic contaminants through π-π-interactions. Thus, nZVI-AVP can be considered a promising adsorbent for the removal of PAHs from aqueous solutions.</p> Graphical abstract <p></p>

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Mechanistic insights onto adsorptive removal of phenanthrene from aqueous solution and real-time effluent using nano zero-valent iron supported aloe vera peel biochar

  • 期刊论文

  • 发表日期：

    2026年3月21日

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  • Prabu Deivasigamani,
  • P. Senthil Kumar,
  • Sathish Sundararaman,
  • Michael Rahul Soosai,
  • A. Annam Renita,
  • M. Karthikeyan,
  • J. Aravind Kumar,
  • Murat Yılmaz,
  • Naveen Prasad,
  • Sivamani S

摘要

Polycyclic aromatic hydrocarbons (PAHs) discharged through anthropogenic activities pose a threat to the environment. In this study, a nanocomposite material was successfully prepared by stacking nanoscale zerovalent iron (nZVI) onto biochar derived from aloe vera peels (AVP) to achieve efficient adsorptive removal of phenanthrene.The results of the batch study showed that at pH 7 and an nZVI-AVP dosage of 0.8 g/L, the maximum removal efficiency of 96.25% was achieved after 40 min of adsorption.Kinetic studies were conducted at various pH levels and phenanthrene concentrations.Batch studies confirmed that the qe value estimated using the pseudo-second-order model best fits the data for phenanthrene removal by nZVI-AVP and closely agrees with the experimental values.Loading nZVI onto AVP enhances its performance and increases its capacity to sequester phenanthrene. The nZVI-AVP specifically adsorbed aromatic contaminants through π-π-interactions. Thus, nZVI-AVP can be considered a promising adsorbent for the removal of PAHs from aqueous solutions.

Graphical abstract