Application of Biochar in the Remediation of Heavy Metal Pollution in Agricultural Soils

Abstract

As industrialization progresses, heavy metal contamination in agricultural soils has become a pressing concern, threatening the safety of food crops, the balance of ecosystems, and human well-being. This environmental issue has garnered significant attention due to its widespread impact. Major contributors to soil contamination include the release of industrial effluents, air emissions, solid waste, and the excessive application of chemical fertilizers and pesticides. The ongoing accumulation of heavy metals compromises soil health and hinders plant development. Biochar, an emerging soil amendment, has demonstrated great potential in addressing heavy metal pollution in agricultural environments. Its distinctive characteristics—such as high porosity and extensive surface area—enable it to effectively adsorb and stabilize heavy metal ions. Moreover, biochar contributes to improving soil fertility, enhancing moisture retention, optimizing soil structure, and promoting microbial diversity, thereby supporting healthier crop growth. This study investigates the role of biochar in remediating heavy metal-contaminated agricultural soils and aims to provide innovative and sustainable strategies for environmental restoration.