Investigate the Synergistic Mechanism of Nitrogen/sulfur co-doped Carbon and Its Application in the Remediation of Heavy Metals

Abstract

Heavy metal pollution has become a serious global threat, causing great damage to the environment and human health. Nitrogen/sulfur co-doped biochar(NBCs) is of significant importance for the remediation of heavy metal pollution. This paper aims to deeply explore the synergistic mechanism of NBCs in heavy metal remediation. It has been found that NBCs can optimize the pore structure and surface chemical properties of biochar, and significantly improve the adsorption efficiency and stability of heavy metals. This paper also systematically reviews various synthesis processes and modification mechanisms of NBCs, and explores the oxidative precipitation and chemical fixation mechanisms of NBCs in the system of synergistic oxidants. However, existing research still faces challenges such as unclear synergistic remediation mechanisms for multiple metals, insufficient long-term stability of the carbon skeleton, and lack of verification for large-scale applications. In the future, new preparation processes need to be developed to promote the application of NBCs in complex environments, providing theoretical support and practical reference for the development of green and sustainable remediation technologies.