Effects and mechanisms of zero-valent iron-loaded corn straw biochars on Cd(II) adsorption onto loessial soil

Key Points

• Cadmium adsorption increased significantly with the use of zero-valent iron-loaded biochars in loessial soil.
• The adsorption capacity measured up to 85% in controlled conditions, enhancing soil quality.
• Analysis included the evaluation of various biochar types and their impacts on cadmium removal efficiency.
• These findings suggest practical applications of biochars for reducing heavy metal pollution in agricultural soils.