We evaluated the adsorption performance of attapulgite/carbon (APT/C) composite as reusable adsorbents for antibiotics. APT/C composite was first synthesized by one-step calcination based on the spent bleaching earth after bleaching of vegetable oil, and followed by a thermal regeneration after adsorption of antibiotic at different temperatures. Antibiotics adsorption results revealed that APT/C composites prepared at 300 °C exhibited high adsorption capacity and fast equilibrium. Thermal regeneration proved to be an efficient methodology for recycling the spent antibiotic-loaded APT/C composites. After the ten-time continuous adsorption-calcination process, the removal ratios of the recycled adsorbents still retained around 67.3% and 62.9% for chlortetracycline and tetracycline, respectively. The conjugation of the adsorption and regeneration results suggested that combining the advantages of APT and carbon species provided a feasible strategy to fabricate a promising adsorbent with the desirable adsorption and regeneration properties for removal of antibiotics in the future.
Korean Journal of Chemical Engineering – Springer Journals
Published: May 25, 2018
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