Sorption performance and mechanism of a sludge-derived char as porous carbon-based hybrid adsorbent for benzene derivatives in aqueous solution

- Hierarchical porous sludge char were fabricated by pyrolysis at 500 °C.
- A stronger Si-O bond (1.83 Å and 1.87 Å) between the carboxyl and SiO2 was found.
- Quantum chemistry calculation confirmed the interaction of Si-O and H-O bonds.
- Multiple model (QT = QA + KPCe) was presented in the sludge char sorption process.