Chinese Journal of Applied Chemistry ›› 2025, Vol. 42 ›› Issue (8): 1144-1154.DOI: 10.19894/j.issn.1000-0518.250072

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Adsorptive Removal of Neonicotinoid Pesticides in Water by MOF-525 Composite Sponge Designed by Perspective of Molecular Interactions

Xin-Yu ZHANG1,2, Jian-Hui HUANG1,2, Lei HUANG1,2, Da-Ming ZHANG2,3, Fei XU1,2, Xiu-Xiu WU1,2()   

  1. 1.School of Health Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China
    2.Shanghai Engineering Research Center of Food Rapid Detection,Shanghai 200093,China
    3.Shanghai Ruixin Technology Instrument Co. ,Ltd. ,Shanghai 200331,China
  • Received:2025-02-24 Accepted:2025-06-16 Published:2025-08-01 Online:2025-08-11
  • Contact: Xiu-Xiu WU
  • About author:xiuxiuwu@usst.edu.cn
  • Supported by:
    the Program of Shanghai Academic/Technology Research Leader(22XD1434700);the National Natural Science Foundation of China(32302219)

Abstract:

Porphyrin based-metal organic framework (MOF) with strong affinity for neonicotinoid pesticide molecules were screened based on intermolecular interactions. Neonicotinoid pesticide molecules bind to meso-tetrakis(4-carboxyphenyl)porphyrin (H4TCPP) ligands mainly through weak interactions such as π-π interactions, CH…π and Cl…π. MOF-525 was prepared by solvothermal method using zirconium chloride octahydrate, meso-tetra(4-carboxyphenyl)porphin, and benzoic acid as the raw materials. MOF-525 was immobilized on a melamine sponge (MS) by poly (vinyl alcohol) (PVA) to obtain MOF-525 composite melamine sponge (MOF-525@MS). The structure of MOF-525@MS was characterized by using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and thermogravimetric (TG), respectively. MOF-525@MS was used as an adsorbent for the optimization of adsorption experimental conditions, determination of actual samples and determination of reusability of four neonicotinoid pesticides (nitenpyram, thiamethoxam, acetamiprid and imidacloprid) in water. The results showed that the removal rate of MOF-525@MS for the above four neonicotinoid pesticides was over 87.49% at pH=5, adsorption time of 15 min and 8% NaCl. Three kinds of water samples from Huangpu River, field water and lake water were spiked with different concentrations of pesticides (100, 200 and 300 mg/L), and MOF-525@MS showed 80.61%~97.82% removal of pesticides in all three kinds of water samples. Finally, the removal rate was still 75.41%~81.20% after five cycles of adsorption-elution-drying-re-adsorption repetition, which has good reusability and is a good adsorbent material that can be used for the removal of neonicotinoid pesticides in water.

Key words: Metal-organic framework, Composite materials, Neonicotinoid pesticides, Adsorptive removal

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