Abstract
A bulk carbon adsorbent with a bionic structure was synthesized based on wrinkled silica microspheres colloidal crystal templates (WSMs-CCTs). As a result, the carbon microcapsules with the internal structure of beef omasum are closely integrated by interconnected macropores to form the bulk carbon adsorbent (ICM-BO). ICM-BO was further applied as a phenol adsorbent to achieve efficient phenol removal. Compared with the reported adsorbents, ICM-BO with excellent adsorption capacity and reusability are attributed to the hierarchical nanoscale needle-like structure of the inner walls, interconnected macropores, and the robust monolith nature. The isothermal adsorption process can be well described through the Liu model with a maximum proposed absorption value of 504. 8 mg g−1 at 318 K. In addition, the morphology of ICM-BO is maintained and the regeneration efficiency (RE) is relatively stable after 10 cycles, indicating that ICM-BO has excellent reusability. Notably, in the simulated industrial effluent experiment, the removal rate of phenolic compounds by ICM-BO reach 93.5%, indicating that the ICM-BO is hardly affected by other components and has excellent adsorption capacity, which is expected to be an ideal choice for the adsorption of phenols.
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