Pyrolysis Temperature Dependence of Pb2+ removal by Sewage Sludge Biochar：characteristics evaluation and adsorption performance

Key Points

• The aim is to evaluate how different pyrolysis temperatures affect lead ion removal from water using sewage sludge-derived biochar.
• Prepared biochar from sewage sludge at various pyrolysis temperatures (400 – 700 °C).
• Conducted adsorption experiments to test lead removal efficiency.
• Analyzed the characteristics of biochar, focusing on surface area and functional groups.
• Lead removal efficiency varied significantly with pyrolysis temperature.
• Higher pyrolysis temperatures improved the specific surface area of biochar, enhancing adsorption capacity.
• Optimum temperature for maximum lead removal was identified.