A simple and efficient strategy to prepare a β-CD-modified hyper-crosslinked styrene-divinyl benzene copolymer (CDM-HCP) was developed. It was applied for the removal of anilines from aqueous solutions. The introduction of β-CD into the hyper-crosslinked polymer (see the featured scheme)significantly enhanced adsorption properties for the removal of various amines such as aniline, p-chloroaniline (p-CA)p-methylaniline (p-MA) and p-aminobenzoic acid (p-ABC). The maximum adsorption capacities determined by adsorption isotherms were 148.97 mg/g for aniline, 198.45 mg/g for p-MA, 293.71 mg/g for p-CA, and 622.91 mg/g for p-ABC, respectively. It had higher adsorption capacities than those of some commercial polymeric resins, such as XAD-4, PA66, and AB-8.
Figure 1 Effect of the amounts of β-CD in CDM-HPC on the amine adsorption
A CDM-HCP can be regenerated efficiently and used repeatedly, indicating its potential technological applications in removing organic pollutants from actual industrial effluents.
Yang, Z., Wu, G., Li, Q., Ai, H., Yao, X., & Ji, H. (2020). Immobilization of β-CD on a Hyper-Crosslinked Polymer for the Enhanced Removal of Amines from Aqueous Solutions. Polymers, 12(7), 1620. doi:10.3390/polym12071620