Abstract
Metal and Metalloid elements have rich chemistry in agroecosystem with widespread diversity, dynamics, and transformations. Among all metal/metalloid elements, some are classified as heavy metal/metalloid contaminants or pollutants (HMPs) while other as heavy metal nutrients (HMNs). The HMPs includes Cd, Pb, Hg while As is metalloid and all of these are toxic for plants even in small concentrations while HMNs include Fe, Mn, Zn, Ni, Co, and Cu which can become toxic for plants in higher concentrations. Role of carbon-based amendments like biochar and other biostimulants have always been an interesting approach in the management of geochemistry of these nutrients as well as their sustainable management in agriculture. The current chapter summarizes heavy metal/ metalloid contaminant source, classification, and fate in the soil-plant-human food chain and review biochar and biostimulant relevant research for effective management of the same. Furthermore, it also includes a short biobiographic analysis regarding relavent research dimensions, and published literature.
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