Abstract
Because of rapid industrialization and agriculturalization, solving the pressing problems of environment pollution, especially water and food quality, requires innovative solutions. Pesticides, notably organic nitrogen pesticides (ONPs). It was a ubiquitous pollutant that requires effective adsorption and removal strategies due to its harmful effects on health. Here, an amazing method was proposed for efficient adsorption and sensitive detection six ONPs in different tea and waste waters. This study outlined the successful construction of a urchin-shaped hollow metal organic framework (named as H-ZIF-8@Zn-MOF-74) by solvothermal conversion strategy, resulting in the fabrication of solid-phase microextraction (SPME) fiber coating. The orthogonal experimental design (OED) was used to evaluate the effects of five factors and five levels of experimental parameters. Under the optimal conditions, the coated SPME fiber exhibited excellent removal efficiency for six ONPs, the maximum adsorption capacities were 31.82, 19.67, 26.96, 52.59, 18.67, and 25.46 mg g−1, respectively, this was attributed to the hollow structure and open coordination unsaturated metal sites. Moreover, the established detection method presented a wider linear range (0.072–1000 μg/L), lower detection limits (LOD) (0.021–0.422 μg/L) and quantification limits (LOQ) (0.072–1.406 μg/L). The relative recovery rate of pesticide analysis was from 83.86 % to 111.8 %, and the relative standard deviation of real water samples was 0.548 % to 7.336 %. The developed SPME fiber demonstrated notable stability and durability even after many uses, suggesting their strong potential for future applications in adsorption and extraction of solution. This innovative method offered a direct and eco-friendly approach for fabricating MOFs-based SPME fibers to organic pollutants.
Published Version
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