Potential of Biochar to Immobilize Nickel in Contaminated Soils

This chapter focuses on the biochar potential for immobilization of Ni in contaminated soils. It explains the possible mechanisms of interaction between biochar and Ni in soils and the cutting edge of biochar production and development for better performance of Ni immobilization. Different management strategies have been employed for the remediation of contaminated soils with potentially toxic elements including Ni. Conventional soil remediation strategies, including solidification, soil replacement, soil washing, and electrokinetic extraction, have been used for such purpose. In a number of studies, biochar proved to be a suitable candidate to stabilize Ni and remedy contaminated soil. The International Biochar Initiative defined the biochar as "a solid material obtained from the thermochemical conversion of biomass in an oxygen-limited environment". Biochar is recognized as a potentially feasible tool for dealing with numerous environmental issues, including soil remediation, waste management, climate change mitigation, and energy production.