Exploring the Efficacy of Methylated Gamma-Cyclodextrin (M-γ-CD) in the Removal of Heavy Metals in Soil Systems

Heavy-metal contamination of the environment is a serious worldwide issue, as it presents dangerous threats to both human health and aquatic ecosystems. This has led to a paradigm shift toward the development of simple, user-friendly, and economically viable remediation technologies that are essential for addressing heavy-metal soil pollution and for the global preservation of the environment. This review provides a comprehensive overview of environmental remediation strategies using cyclodextrin (CD) and its derivatives. Additionally, this study examines the effectiveness of methylated gamma-cyclodextrin (M-γ-CD) as a modified oligosaccharide for the elimination of toxic elements from impure soil matrices. M-γ-CD has emerged as a potent agent for treating soil impurities with noxious metals. As a modified form of cyclodextrin, M-γ-CD features hydrophobic cavities that are particularly adept at forming inclusion complexes with heavy-metal ions, thereby cumulating the aqueous solubility and efficiency of pollutants in environmental applications and improving soil bioremediation. This paper also reviews the unique structural configuration of M-γ-CD, which significantly enhances the solubility and mobility of cyclodextrins and facilitates the extraction of noxious metal particles such as Ni, Cu, and Pb from soil matrices. Furthermore, M-γ-CD is a promising soil remediation agent due to its capacity to boost contaminant solubility, improve environmental safety, offer cost-effectiveness, ensure adaptability, and minimize impact on soil parameters. Therefore, M-γ-CD is a desirable agent for the elimination of toxic metal impurities from soil.