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Phosphoric-acid-activated biochar derived from spent coffee grounds as sustainable adsorbent for solid-phase extraction
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DOI：10.1016/j.mtcomm.2026.115590.png)
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Abstract
En 中文
• Sustainable SPE is sorbent from waste spent coffee grounds. • H₃PO₄ activation creates mesoporous biochar (207.7 m² g⁻¹). • High adsorption capacity for tetracycline (qmax = 97.4 mg g⁻¹). • Synergistic adsorption via π–π, H-bonding, and electrostatic forces. • Stable and reusable SPE cartridge over five cycles.
Keywords:
Biochar
Solid-phase extraction
Tetracycline
Wastewater treatment
Adsorption
Spent coffee grounds
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