Abstract：
Rapid and efficient removal of environmental antibiotics is vital to curb bacterial resistance. Through rational precursors-oriented design, we attain the best Al2O3 absorbent by 500 °C calcination of ammonium aluminium carbonate hydroxide (AACH) precursor from NH4HCO3 route (AACH-NH4HCO3-500) for fast and efficient removal of tetracycline (TC) and other antibiotics from environmental waters including high-salinity wastewater. AACH-NH4HCO3-500 (0.25 g·L-1) can remove (69.92 ± 1.78)% of aqueous TC (0.025 g·L-1) within 5 min and (97.62 ± 2.75)% within 2 h, and the adsorption capacity is 444.4 mg·g-1, which is the highest qmax of TC for the 2 h-adsorptions among numerous adsorbents. AACH-NH4HCO3-500 has fine tolerance to the coexisting substances, and can be easily regenerated and reused, and has no harm even discarded. The relations among the synthetic methods, the structural features, and the adsorption functions of Al2O3 are disclosed through a systematic comparison of the commercial Al2O3 and different Al2O3 nanomaterials attained from three precursors produced by five different routes. The reasons behind the exceptional adsorption performance are discussed throughout. Our findings would facilitate the development of excellent adsorbents for removal of other pollutants.
摘要：
快速有效地去除环境抗生素对于抑制细菌耐药性至关重要。通过合理的前体导向设计，我们通过从NH4HCO3路线（AACH-NH4HCO3-500）中500°C煅烧碳酸铝铵（AACH）前体，以获得最佳的Al2O3吸收剂，以快速有效地从环境中去除四环素（TC）和其他抗生素包括高盐度废水。AACH-NH4HCO3-500（0.25g·L-1）可以在5分钟内除去（69.92±1.78）％的水TC（0.025g·L-1），在2小时内除去（97.62±2.75）％，吸附容量为444.4mg·g-1，是众多吸附剂中TC吸附2h的最高qmax。AACH-NH4HCO3-500对共存物质具有良好的耐受性，并且可以很容易地再生和重复使用，并没有伤害甚至丢弃。合成方法之间的关系，结构特征，通过对商业Al2O3和由五种不同途径生产的三种前体获得的不同Al2O3纳米材料的系统比较，公开了Al2O3的吸附功能。在整个过程中讨论了出色的吸附性能背后的原因。我们的发现将有助于开发出色的吸附剂来去除其他污染物。
