Effect of thiourea-modified biochar on adsorption and fractionation of cadmium and lead in contaminated acidic soil

Biochar was obtained through pyrolysis of carrot pulp (CP) and then further modified with thiourea (CH4N2S). We investigated the effect of carrot pulp biochar (CPB) and modified CPB (MCPB) for adsorption and chemical fractionation of cadmium (Cd) and lead (Pb) in contaminated acidic soil. Application of modified biochar significantly (p?