Novel Magnetically Interconnected Micro/Macroporous Structure of Monolithic Porous Carbon Adsorbent Derived from Sodium Alginate and Wasted Black Liquor and Its Adsorption Performance**

The novel and facile preparation of magnetically interconnected micro/ macroporous structure monolithic porous carbon adsorbent (MPCA) were designed presented herein. synthesis was achieved via conventional freeze-drying pyrolysis processes. In this study, sodium alginate wasted black liquor employed as starting precursors. Sodium acts a template materials, whereas liquor, the product from paper industry with plentiful lignin content alkaline solution, played an essential role in reinforcement activation porosity for resulting materials. Moreover, both precursors well dissolved Fe3+ providing simple addition magnetic source one-pot synthesis. micro/macroporous structures generated through and, subsequently process. obtained cylindrical-shaped (MPCA-700) showed high mechanical stability, BET specific surface area (902 m2 /g). Such aforementioned features considered suitable to make synthesized monolith removal heavy metal ions. maximum adsorption capacity MPCA-700 towards Pb2+ ions 76.34 mg/g at pH 5. studies illustrated that kinetics isotherm perfectly fitted pseudo-second-order model Langmuir isotherm, respectively. This work presents promising protocol reduce overall costs renewable adsorbents good efficiency regeneration.