Bio-assembled MgO-coated tea waste biochar efficiently decontaminates phosphate from water and kitchen waste fermentation liquid

Abstract Crystal morphology of metal oxides in engineered metal-biochar composites governs the removal phosphorus (P) from aqueous solutions. Up to our best knowledge, preparation bio-assembled MgO-coated biochar and its application for P solutions kitchen waste fermentation liquids have not yet been studied. Therefore, this study, a needle-like MgO particle coated tea c omposite (MTC) was prepared through novel biological assembly template elimination process. The produced MTC used as an adsorbent removing synthetic solution real liquid. maximum sorption capacities MTC, deduced Langmuir model, were 58.80 mg g ?1 at pH 7 192.8 liquid 9. increase ionic strength (0–0.1 mol L NaNO 3 ) reduced efficiency 98.53% 93.01% but had no significant impact on Precipitation MgHPO 4 Mg(H 2 PO (76.5%), ligand exchange (18.0%), electrostatic attraction (5.5%) potential mechanisms solution, while struvite formation (57.6%) (42.2%) governed Compared previously reported MgO-biochar composites, lower capacity phosphate higher studied could be effective candidate environments, especially liquids. In future, it will necessary systematically compare performance with different oxide crystal types wastewater. Graphical