Efficient adsorption of triazole fungicides using a porous organic polymer with imine/aminal linkages

•The synthesized MPA-TPA-POPs were employed for the first time as adsorbents to efficiently remove triazole fungicides from aqueous solutions.•The optimal adsorption rates of MPA-TPA-POPs for triazole fungicides FLU, PAC, TEB, and TRI were determined to be 99.94%, 99.54%, 99.74%, and 79.94%.•Fitting with various models elucidated the adsorption mechanism and interaction between MPA-TPA-POPs and fungicides.•Through interference test and adsorption–desorption test experiments, MPA-TPA-POPs were demonstrated to be a class of efficient and stable adsorbents in real wastewater. Triazole fungicides are widely used in agricultural production and possess strong environmental toxicity, necessitating their removal from water sources. Due to their notable characteristics, including high surface area and tunable porous structure, porous organic polymers (POPs) show promise as materials for adsorbing various fungicides from wastewater. Here, MPT-TPA-POPs were synthesized in green solvents using inexpensive diamines and dialdehyde monomers to form imine and aminal linkages. MPT-TPA-POPs were tested as an adsorbent for removing triazole fungicides from water under different conditions. It was found that MPT-TPA-POPs exhibited excellent adsorption capacity towards triazole fungicides. The optimal adsorption rates for flutriafol (FLU), paclobutrazol (PAC), Tebuconazole (TEB), and triadimefon (TRI) were 57.82 %, 86.55 %, 91.95 %, and 98.3 %, respectively, with maximum adsorption capacities of 106.15 mg/g, 219.45 mg/g, 234.65 mg/g, and 233.9 mg/g. The adsorption process was found to be more in line with the pseudo-second-order kinetic model and Langmuir model. The reuse and cost analysis of the adsorbent indicates that after 6 cycles of adsorption-desorption, the reusability efficiency of the adsorbent material in simulated water samples remains above 89 %. A series of characterization methods were used to characterize MPT-TPA-POPs before and after the adsorption of triazole fungicides to examine changes in functional groups, morphology, elemental composition, surface area, and pore volume. The study results suggest that MPT-TPA-POPs can serve as a green, low-cost, and efficient adsorbent for removing triazole fungicides from water, providing a new approach for fungicide removal and adsorbent development.