Developing new type of metal-organic framework iron fertilizer
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1.Nanjing Institute of Soil Science/State Key Laboratory of Soil and Sustainable Agriculture, Chinese Academy of Sciences, Nanjing 210008, China;2.College of Environment and Ecology, Jiangsu Open University, Nanjing 210017, China;3.College of Advanced Agricultural Science, University of Chinese Academy of Sciences, Beijing 100049, China

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S511;S143.1;TP39

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    Abstract:

    Metal-organic framework (MOF) material is a class of ecologically and environmentally friendly and functional cluster compound, which can be pre-designed topologically to achieve targeted loading and complexation of specific nutrients at the molecular level. In this article, the iron ions were used to synthesize a new Fe based MOF (Fe-MOF) fertilizer under mild hydrothermal conditions to study and evaluate the potential of Fe-MOF materials for application in iron fertilizers. The elemental composition and structural features of Fe-MOF were characterized using techniques including powder X-ray diffraction (PXRD), mid infrared spectroscopy (FTIR ATR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The behaviors of releasing nutrient were investigated by using hydrostatic dissolution and soil incubation experiments. The results showed that Fe-MOF was composed of iron, nitrogen, phosphorus, carbon, oxygen, and hydrogen elements, with a loading capacity of 19.7% for iron, a ratio of 1∶1 for trivalent and divalent iron, and a loading capacity of 5.1% and 14.7% for nitrogen and phosphorus, respectively. The cumulative release rate of iron in aqueous solution for 84 days was 4.7%, while the cumulative release rate in soil reached 58.7%, showing the characteristic of excellent slow and controlled release. It is indicated that the synergistic compatibility and directional assembly of trace elements (iron) and macro elements (nitrogen, phosphorus) have been achieved by using environmentally friendly materials as substrates and a simple and green process of hydrothermal synthesis. It will provide a feasible pathway for designing a new type of iron fertilizers.

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吴珂,周健民,杜昌文. Developing new type of metal-organic framework iron fertilizer[J]. Jorunal of Huazhong Agricultural University,2023,42(6):73-79.

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History
  • Received:October 18,2023
  • Revised:
  • Adopted:
  • Online: December 12,2023
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