Heavy metal pollution is a pressing environmental concern due to its persistence, bioaccumulation, and toxicity hazards. Organic treatments, particularly the use of biochar, have proven effective in heavy metals and metalloid remediation efforts. Biochar’s effectiveness in heavy metal sorption depends on various factors such as surface area, porosity, functional groups, and mineral and ash content which are influenced by the production process and conditions. High-temperature pyrolysis of biochar feedstock alters its structure, transitions aliphatic chains to aromatic structures, and reduces functional groups such as carboxyl and hydroxyl fractions. Metal immobilization function is attributed to functional groups which are active sites of metal binding while dense mineral content brings precipitation. High-temperature pyrolysis increases biochar's surface area, resulting in increased adsorption and metal accumulation in pores. Biochar represents an environmentally friendly and cost-effective approach for heavy metal control, which also boosts crop growth and soil fertility. Further research is warranted to explore metal dynamics under natural environmental conditions, elucidating metal interactive patterns and bioavailability of essential minerals.