Iron powder water purifying agent and preparation method thereof
A technology of water purifying agent and iron powder, which is applied in chemical instruments and methods, water/sewage treatment, oxidized water/sewage treatment, etc. It can solve the problems of harming human health, environmental pollution by industrial wastewater, and unsatisfactory purification effect of industrial wastewater, etc. problems, to achieve the effect of increasing oxidation performance and increasing removal rate
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Embodiment 1
[0035] A preparation method of iron powder water purifying agent is characterized in that the method comprises the following steps:
[0036] Prepare mixed iron ore powder;
[0037] Mixing and reacting the mixed iron ore powder with hydrochloric acid and filtering a small amount of precipitate contained in the solution after the reaction to obtain a first mixed solution;
[0038] Prepare the second mixed solution containing nitric acid and modified ferric nitrate;
[0039] mixing the first mixed solution with the second mixed solution to obtain a third mixed solution;
[0040] Prepare a fourth mixed solution containing activated calcium oxide; and
[0041] The third mixed solution is mixed with the fourth mixed solution.
Embodiment 2
[0043] The preparation method of described mixed iron ore powder is:
[0044] Mix iron ore, pyrite and pyrite according to the weight ratio (1-1.8): (1-1.8): 1, and obtain 800-mesh mixed iron ore powder after crushing, crushing and ball milling.
[0045] The weight ratio of the mixed iron ore powder and hydrochloric acid is (0.7-1.5): (1-2); the mixed reaction conditions of the mixed iron ore powder and hydrochloric acid are: stirring at 60-80°C for 2-5 hours and Stand still for 2-4h; wherein, the mass fraction of the hydrochloric acid is 24%, and the density is 1.12g / cm³.
Embodiment 3
[0047] The method for preparing the second mixed solution is: mixing the nitric acid and modified ferric nitrate into water, stirring at 40-60°C for 0.5-2h, wherein the total weight of the nitric acid and modified ferric nitrate is equal to The weight ratio of water is (1-2): (1.5-6); the weight ratio of the nitric acid to the modified ferric nitrate is (1-2): (4.5-6); the mass fraction concentration of the nitric acid is 68 %, the density is 1.4g / cm³.
[0048] The preparation method of the modified ferric nitrate is as follows: place the ferric nitrate under the protection of liquid nitrogen, let it stand for reaction at a temperature of -5-10° C. for 30-50 minutes, and then naturally raise the temperature to room temperature.
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