There are major environmental risks associated with antibiotic contamination in water, such as difficulty in removal, bioaccumulation and ecotoxicity. Inspired by the hydrophobic-hydrophilic structure of beetle carapaces, bionic membrane and column of UiO-66-NH₂ were prepared by a novel in-situ polymerization method. As aqueous passes through the obtained membrane, the solution is more inclined toward the hydrophilic UiO-66-NH₂ particles and the water channels than the hydrophobic substrate, promoting adsorption efficiency. The same method can be used to manufacture columns with better performance than commercially available HLB columns, suitable for processing large volumes of liquid. In this work, the effects of pH, adsorbent dosage, time and temperature on the adsorption of CIP were studied. Moreover, the static adsorption thermodynamics, kinetics and dynamic adsorption were investigated. The sorption could be appropriately described by the Langmuir isotherm model. Thermodynamic studies revealed that the adsorption process was spontaneous (ΔG < 0) and endothermic (ΔH > 0) with entropy generation (ΔS > 0). The UiO-66-NH₂ adsorption column exhibited an excellent dynamic adsorption effect on CIP. The study findings suggest that the prepared membrane and adsorption column exhibit promising abilities in removing CIP from solutions.

Mercury is the most toxic and harmful heavy metal pollutant, and it is essential to detect and remove mercury from beverages. Inducing the porphyrin molecules into the chitosan structure, a novel membrane sensor tetrakis(4-carboxyphenyl)porphyrin-grafted chitosan fiber membrane (TCPP-CS) was prepared by electrospinning method and applied to recognize Hg²⁺ contaminant selectively. Compared with other common metal ions (Pb²⁺, Cu²⁺, Fe³⁺, Cr³⁺, Mg²⁺, and Zn²⁺), the colorimetric sensor has specific color development and sensitivity to Hg²⁺ and the detection limit of the sensor reaches 1 × 10^–5 mol·L^–1. The response time of the membrane is 5 s, and it can be specifically colored in various pH environments convenient for practical application. Hg²⁺ resulted in a visual color change of the fiber membrane from brown to yellow-green, indicating a potential interaction between the porphyrin-functionalized chitosan fiber membrane and Hg²⁺ ions, and the wavelength shift of the UV–visible spectrum can be observed. It has the advantages of simplicity, rapidity, high selectivity, and high sensitivity, providing a new method for removing and detecting heavy metals in traditional Chinese medicine and drinks.