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  1. Home
  3. Adsorption Characteristics Of Ball Milling-modified Chinese Medicine Residue Biochar Toward Quercetin.
  1. Home
  3. Adsorption Characteristics Of Ball Milling-modified Chinese Medicine Residue Biochar Toward Quercetin.

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Adsorption Characteristics of Ball Milling-Modified Chinese Medicine Residue Biochar Toward Quercetin.

Lanqing Li1, Yue Xie1, Keyan Chen1

  • 1College of Resources and Environment Science, Anhui Science and Technology University, Fengyang 233100, China.

ACS Omega
|March 18, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Ball-milled biochar derived from traditional Chinese medicine residues effectively removes quercetin, a harmful plant toxin. The best-performing biochar (BMC700) shows high adsorption capacity and recyclability, offering solutions for continuous cropping challenges.

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Area of Science:

  • Environmental Science
  • Materials Science
  • Agricultural Science

Background:

  • Traditional Chinese medicine residues are abundant agricultural byproducts.
  • Allelopathic autotoxic substances like quercetin inhibit plant growth in continuous cropping systems.
  • Biochar is a promising adsorbent for environmental remediation.

Purpose of the Study:

  • To prepare and characterize biochar (BC) and ball-milled biochar (BMC) from traditional Chinese medicine residues.
  • To evaluate the adsorption performance of BC and BMC for quercetin removal.
  • To elucidate the adsorption mechanism and explore the recyclability of the adsorbents.

Main Methods:

  • Biochar production via oxygen-limited pyrolysis at varying temperatures (300, 500, 700 °C) followed by ball milling.
  • Characterization using Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Raman spectroscopy.
  • Adsorption experiments investigating pH, humic acid concentration, kinetics, and isotherms; desorption and recyclability tests.

    • Main Results:

    • Pyrolysis increased BC aromaticity and carbon stability, while ball milling enhanced BMC surface oxygen-containing functional groups.
    • Ball-milled biochar derived from traditional Chinese medicine residues pyrolyzed at 700 °C (BMC700) showed the highest quercetin adsorption capacity (293.3 mg·g⁻¹ at 318 K).
    • Adsorption followed pseudo-second-order kinetics and Freundlich isotherm, indicating multimolecular layer adsorption.

    Conclusions:

    • BMC700 is a highly effective adsorbent for quercetin removal from aqueous solutions.
    • The adsorption mechanism involves pore-filling, hydrogen bonding, electrostatic interactions, π-π interactions, and the yoke effect.
    • The developed biochar adsorbents are recyclable and offer a sustainable solution for continuous cropping issues caused by allelopathic substances.