Porous FeS material, preparation method thereof and application of porous FeS material in purification of wastewater containing arsenic and/or heavy metals
A technology for heavy metals and wastewater, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of low arsenic content in sulfide slag, insufficient reaction, high sodium sulfide dosage, etc., and achieve reactivity High, reduce pollution, meet the effect of application requirements
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Embodiment 1
[0033] Weigh a certain amount of pyrite and iron powder respectively, so that nFeS 2 :nFe=1:1, then put it in a mortar, grind and mix well. The mixed pyrite and iron powder were sieved, and the -200 mesh minerals were placed in a crucible, then the crucible was placed in a tube furnace, and nitrogen was introduced, and calcined at 500 ° C for 120 min; The product was taken out and ground in a mortar and sieved to obtain -200 mesh porous FeS material.
[0034] At the same time, five sets of control experiments at different temperatures were set up, and the calcination temperatures were 400 °C, 450 °C, 550 °C, 600 °C, and 700 °C; SEM image of figure 1 The XRD patterns of the porous FeS materials prepared at 400°C, 450°C, 550°C, 600°C and 700°C calcination temperature are shown in figure 2 shown. from figure 1 It can be seen that the porous FeS material prepared by calcination at 500 °C has an obvious porous structure. figure 1 It shows that the surface of the calcined pro...
Embodiment 2
[0037]Weigh a certain amount of pyrite and iron powder respectively, so that nFeS 2 :nFe=1:1.5, then put it in a mortar, grind and mix well. The mixed pyrite and iron powder were sieved, and the -200 mesh minerals were placed in a crucible, then the crucible was placed in a tube furnace, and nitrogen was introduced, and calcined at 550 ° C for 120 min; The product is taken out and ground in the grinding process, and the -200 mesh porous FeS material can be obtained by sieving.
[0038] Using the porous material prepared by the above method to remove heavy metal ions in the foul acid, the specific steps are as follows: adding the prepared porous FeS material into a three-necked flask, measuring 200 mL of the above-mentioned fouling acid in the three-necked flask, and setting the temperature to 80°C, It was placed on a water bath heating stirrer and stirred, and the rotation speed was set to 300 r / min. After fully reacting for 60 min, the amount of porous FeS material added was...
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