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Attapulgite/carbon composites as a recyclable adsorbent for antibiotics removal
Jie Tang,Li Zong,Bin Mu,Yuru Kang,Aiqin Wang 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.8
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 oC 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.