Abstract
Due to the ecosystem and public health concerns, contaminants must be removed from the water, and water purification methods aim to find superior materials with superior chemistry and unique structures. We developed a new 3D flower-like double-oxide hydrotalcite composite as an extraction phase for the enrichment of quinolone antibiotics (QAs). In this work, NiAl double-oxide composite microspheres (Al2O3-C@NiAl-LDO) with 3D flower-like structure were prepared by calcining pollen to prepare Al2O3-C carbon templates and homogeneously coating LDO nanosheets on Al2O3-C microspheres. Compared with the pristine NiAl-LDH (82.70 m2/g), the Al2O3-C@NiAl-LDO microspheres exhibited a higher specific surface area (139.70 m2/g), making them rich in active adsorption sites. In addition, a large number of anions that can be exchanged between the layers can effectively enhance adsorption capacity through multiple interactions. The adsorption performance of Al2O3-C@NiAl-LDO microspheres on QAs was investigated in detail. The prepared composites proved to be suitable for the adsorption of QAs in complex samples with a maximum adsorption capacity of 64.08 mg g−1. The developed method was successfully applied to the analysis of QAs in real samples with a satisfactory recovery.
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