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Uracil-functionalized hyper-cross-linked polymers as adsorbents for phenol removal from aqueous solutions
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DOI：10.1007/s11164-026-06085-x.png)
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Abstract
En 中文
This work presents the synthesis and application of uracil-modified hyper-cross-linked polymers (UHCP-Fe and UHCP-Al) as high-performance adsorbents for phenol removal from aqueous solutions. The materials were fabricated via a two-step procedure involving initial grafting of uracil onto chloromethylated polystyrene, followed by a Friedel–Crafts reaction to form the hyper-cross-linked network. Structural analyses confirmed the successful incorporation of uracil and the formation of hierarchical porous architectures, with SBET values reaching 352.2 m2/g for UHCP-Fe and 122.9 m2/g for UHCP-Al. The adsorbents demonstrated exceptional phenol adsorption capacities of 146.8 and 133.1 mg/g at 298 K, respectively, attributed to synergistic interactions such as hydrogen bonding, micropore filling, acid-base interactions, and π–π stacking. Adsorption kinetics were best described by a pseudo-second-order model, while equilibrium data were well-fitted to both Langmuir and Freundlich isotherms, with the Langmuir model showing higher correlation coefficients for UHCP-Fe and UHCP-Al. Thermodynamic studies indicated the process was exothermic, with optimal removal (~ 91.4%) occurring at neutral pH and an adsorbent dosage of 1.0 g/50 mL solution. Moreover, UHCP-Fe retained 89.7% of its adsorption capacity after five regeneration cycles, highlighting its reusability. This work demonstrates a sustainable and effective strategy for treating phenol-contaminated wastewater by integrating bio-based uracil motifs with robust hyper-cross-linked polymers networks.
Keywords:
Uracil
Hyper-cross-linked polymers
Friedel–Crafts alkylation reaction
Phenol
Adsorption
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3.5
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634
Citations:
9.9K
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