Advanced redox water treatment technology based on nitrogen-doped iron-carbon material with core-shell structure and for magnetic field recovery
A core-shell structure, advanced oxidation technology, applied in the fields of oxidized water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as high energy demand, toxic metal leakage, etc., to overcome easy agglomeration and prolong use. The effect of longevity, simple method
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[0020] Example 1 Preparation of a nitrogen-doped iron-carbon composite material with a magnetic core-shell structure
[0021] 674mg FeCl 3 ·6H 2 O, 452.5mg of 2-aminoterephthalic acid (NH 2 DBC), 56mL of N,N-dimethylformamide (DMF) was added to the container, stirred at room temperature to a transparent solution; the solution was transferred to the volume of 100mL PTFE reactor tank, using stainless steel The outer shell was sealed and put into an oven at 443K for 24 hours; after slowly cooling to room temperature, the mixture was centrifuged, and the obtained crystals were washed with DMF and absolute ethanol respectively; the washed crystals were placed in a vacuum drying oven at 100°C for heat preservation 10 hours. The dried crystal was calcined in a tube furnace in a nitrogen atmosphere, and the temperature was raised to 650°C at a temperature rise rate of 5°C / min, kept for 3 hours, and naturally cooled to room temperature to obtain a nitrogen-doped magnetic core-shell struct...
Example Embodiment
[0022] Implementation case 2 A nitrogen-doped iron-carbon composite material with a magnetic core-shell structure activated persulfate to degrade acyclovir drug pollutants in water
[0023] The nitrogen-doped iron-carbon composite material with a magnetic core-shell structure prepared in Example 1 was used as a catalyst to activate persulfate to degrade acyclovir refractory drug pollutants in water. A 250mL beaker is used as a reactor, 200mL of reaction solution is configured, and the pH of the solution is adjusted to 7.0 with 0.1mol / L NaOH. Among them, the dosage of the catalyst is 100 mg / L, the concentration of potassium persulfate is 0.65 mmol / L, the concentration of acyclovir is 10 mg / L, and the reaction is carried out with sufficient stirring at room temperature for 1 hour.
[0024] In this embodiment, the activated persulfate of the nitrogen-doped iron-carbon composite material with a magnetic core-shell structure can effectively oxidize and degrade acyclovir in water. After ...
Example Embodiment
[0025] Implementation case 3 A nitrogen-doped iron-carbon composite material with a magnetic core-shell structure to reduce bromate in water
[0026] Using the nitrogen-doped iron-carbon composite material with a magnetic core-shell structure prepared in Example 1 as a reducing agent to remove bromate from water, a conical flask with a capacity of 300 mL was selected as the reactor, and the concentration of 7.81 μmol / L BrO 3 - The solution is added to the reactor, and then 500mg / L of reducing agent is added to the reactor. After the addition is completed, the bottle stopper is tightly closed, and then shaken at 200 rpm at room temperature. The water sample is taken regularly and filtered through a 0.45 μm filter membrane. Quantitative analysis of BrO by ion chromatography 3 - And Br - The concentration of Figure 4 . Figure 4 It is shown that the nitrogen-doped iron-carbon composite material with a magnetic core-shell structure of the present invention can effectively remove br...
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