Removal and Adsorption Mechanisms of Phosphorus, Cd and Pb from Wastewater Conferred by Landfill Leachate Sludge-Derived Biochar

There is a high treatment cost and secondary pollution to the environment due organic content complex composition in landfill leachate sludge refuse incineration power plants. Landfill sludge-derived biochar (LLSDB) was prepared via pyrolysis order realize its resource utilization remove pollutants from wastewater. The study focused on removal of nutrients phosphorus heavy metals (Cd(II) Pb(II)) wastewater through adsorption process using LLSDB. investigation also looked into kinetics thermodynamics process. It found that Freundlich–Temkin–Langmuir model best for describing initial concentration total phosphorus, (TP) 0–1.0, 1.0–20, 20–120 mg/L, respectively, while Freundlich–Langmuir Cd(II) 100–500 Pb(II) 500–5000 respectively. Additionally, exothermic entropy reduction TP (˂1.0 mg/L) spontaneous, endothermic increment processes (≥1.0 mg/L), increased with temperature. inferred mechanism LLSDB low concentrations TP, mainly physical adsorption, following linear distribution, chemical because series reactions; were nicely adsorbed removed by LLSDB600, which an incredibly superior strategy controlling waste waste.