Abstract:In the Anaerobic Membrane Bioreactor (AnMBR), microbial quorum sensing exacerbates biological fouling. Controlling the concentration of N-acyl homoserine lactones (AHLs) is crucial for membrane fouling control. Furanone (DMHF), a structural analog of AHLs, was selected based on surface molecularly imprinted technology. Nanoscale magnetic Fe_3O_4 particles, modified with the silane coupling agent KH-570, were used as carriers. A magnetic molecularly imprinted polymer (DMHF/SMIP) with selective adsorption for DMHF was successfully prepared through surface polymerization. The DMHF/SMIP was characterized using Fourier Transform Infrared Spectrometer (FTIR), Scanning Electron Microscopy (SEM), and Vibrating Sample Magnetometer (VSM). The results indicated that the DMHF/SMIP had a successfully encapsulated imprinting layer, uniform particle size, stable crystalline form, and good superparamagnetism. Simulation studies investigated the adsorption performance and membrane fouling control by DMHF/SMIP. DMHF/SMIP reached adsorption equilibrium in approximately 50 minutes, with a maximum adsorption capacity of 85.97 mg/g for DMHF. The adsorption process followed second-order kinetics and fit the Langmuir equation, indicating chemical and monolayer adsorption. DMHF/SMIP exhibited excellent stability and recyclability, maintaining an adsorption efficiency of 83.01% after five adsorption-desorption cycles. Selective adsorption experiments demonstrated the high selectivity of DMHF/SMIP for DMHF. Using C_6-HSL as a representative AHL, the adsorption capacity was 3.93 ug/g. Finally, in an AnMBR application experiment, the removal rate of C_6-HSL by DMHF/SMIP was 34.87%. Close-