Abstract
High levels of heavy metals, particularly of lead, in soil and water occur worldwide in many countries. Due to the harmful consequences on human health, it is mandatory to avoid Pb-contaminated soils and waters to enter in the food chain. In this research, biochar was prepared by corn stalk paralysation and alkali-modification. BCR sequential extraction method was employed to evaluate the morphological changes of lead in soil and a pot experiment was conducted with garland chrysanthemum as an indicator plant to investigate the bioavailability of lead in soil with biochar. The results indicated that alkali-modified biochar KBC showed strong immobilization abilities and could reduce the mobility and bioavailability of lead in soil.
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