The use of CDs in soil remediation has a long history. Here is the most recent chapter.
The removal efficiency of antimony (Sb) and naphthalene (Nap) from a combined contaminated soil was studied by carboxymethyl-β-cyclodextrin (CMCD) leaching and reveal its remediation mechanisms. The results show that the highest removal efficiencies of Sb and Nap were 94.82% and 93.59%, respectively. The breakthrough curves show that CMCD had a stronger inclusion capacity of Nap than Sb, and Sb could enhance the adsorption capacity of Nap, while Nap weakened the adsorption of Sb during CMCD leaching. CMCD is a good eluant for remediating soil contaminated by a combination of heavy metals and polycyclic aromatic hydrocarbons (PAHs), and its remediation mechanisms depend on the complexation reactions between the surface functional groups and inclusion reactions in the internal cavities.