A method of magnetic field strengthening Hangjin 2# soil loaded with nanometer zero-valent iron to remove pollutants in water
A technology of nanometer zero-valent iron and magnetic field enhancement, applied in the fields of magnetic/electric field water/sewage treatment, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problem of reduced reactivity and effectiveness of zero-valent iron Degrade pollutants, reduce the possibility of engineering applications and other issues, to achieve the effect of not easy particle agglomeration and self-oxidation, good ion exchange capacity and adsorption capacity, and improve resource utilization
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Embodiment 1
[0047] Preparation of composite magnetic material of Hangjin 2# soil loaded with nanometer zero-valent iron:
[0048] (1) 1.932g of FeCl 3 ·6H 2 O was dissolved in 50ml ethanol solution (40ml ethanol, 10ml water) to obtain a mixed solution.
[0049] (2) The mixed solution described in step (1) is put in the three-necked flask, and add 2.00g Hangjin soil through simply grinding through 200 mesh sieves, so that the mass ratio of nano zero-valent iron (NZVI) and Hangjin 2# soil is 1 :5.
[0050] (3) Pass nitrogen into the mixed solution described in step (2) and magnetically stir for 30 minutes to remove oxygen in the mixed solution.
[0051] (4) Dissolve 0.708 g of sodium borohydride in 100 ml of water, and transfer the sodium borohydride solution to a 250 ml pear-shaped flask.
[0052] (5) under the condition of continuous stirring and feeding nitrogen, the sodium borohydride solution described in step (4) is added in the three-necked flask described in step (3) at a rate o...
Embodiment 2
[0056] (1) Arrange a magnetic field around the reactor, the magnetic field used is a low-temperature superconducting magnetic field, and the magnetic field strength is about 40mT; in the complete mixing reactor, the initial concentration of methyl orange in printing and dyeing wastewater is 50mg / L, and the initial pH value is adjusted to 8.0.
[0057] (2) In the above-mentioned methyl orange wastewater, first add the composite magnetic material of Hang Jin 2# loaded with nanometer zero-valent iron prepared by embodiment 1, the dosage of the composite magnetic material is 1g / L, and the condition that the external magnetic field exists Under the condition, the removal rate of methyl orange by the composite magnetic material can reach 92.8% within 30 minutes; while in the absence of a magnetic field, the removal rate of methyl orange is 63.76% in 30 minutes. The results are shown in figure 2 . Depend on figure 2 It can be seen that the presence of an external magnetic field ca...
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