Pyrolysis temperature-driven structural evolution of wheat straw biochar and enhanced adsorption mechanisms for Cr( vi )

Key Points

• The research aims to understand how different pyrolysis temperatures affect the structure of wheat straw biochar and its ability to adsorb chromium (Cr).
• Compared biochar produced at two temperatures: WS500 and WS300.
• Analyzed the pore structure and chemical groups of the biochars.
• Examined the adsorption capacity of each biochar variant for Cr(vi).
• WS500 biochar showed a significantly improved pore structure compared to WS300.
• Higher adsorption capacity for Cr(vi) was observed in WS500 biochar.
• Cr(vi) was effectively reduced to Cr(iii) in the presence of WS500 biochar.