Drainge treating agent and method for reducing fluorin ion in drainge
A treatment agent, fluoride ion technology, applied in the direction of adsorption water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as not meeting or not meeting soil standards
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Embodiment 1
[0053] The synthesis of embodiment 1 composite metal compound A
[0054] Put 600mL of tap water and 100g of magnesium hydroxide (Kisma F) produced by Kyowa Chemical Industry Co., Ltd. into a beaker with a volume of 3L to make a magnesium hydroxide slurry (2.86 mol / L), and use a quantitative pump under stirring. 850 mL of 0.52 mol / L aluminum sulfate aqueous solution and 1,400 mL of 0.75 mol / L sodium carbonate aqueous solution were simultaneously injected for 30 minutes. The reaction temperature was 20° C., and the pH after the reaction was 7.8.
[0055] The reaction solution was filtered, washed with water, dried in an oven at 60° C. for 20 minutes, and pulverized with a lab-scale hammer mill to obtain a composite metal compound A. Details of the reaction conditions and the composition of the obtained composite metal compound A are shown in Table 1. The X-ray diffraction figure of gained composite metal compound A is shown in figure 1 middle. Such as figure 1 It can be see...
Embodiment 2
[0056] The synthesis of embodiment 2 composite metal compound B
[0057] Using the same magnesium hydroxide as in Example 1, prepare 1L of 2.0 mol / L magnesium hydroxide slurry in a beaker with a volume of 3.5L, and drop 770mL of 1 mol / L magnesium hydroxide slurry into 770mL of 1mol / L magnesium hydroxide under stirring respectively with a time of 30 minutes using a quantitative pump. / L aluminum chloride aqueous solution and 1,250mL 0.75 mol / L sodium carbonate aqueous solution. The reaction temperature was 30° C., and the pH after the reaction was 8.3.
[0058] The reaction solution was filtered, washed with water, dried in an oven at 60° C. for 20 minutes, and pulverized by a laboratory-scale hammer mill to obtain a composite metal compound B. Details of the reaction conditions and the composition of the obtained composite metal compound B are shown in Table 1.
Embodiment 3
[0059] The synthesis of embodiment 3 composite metal compound C
[0060] Using the same magnesium hydroxide as in Example 1, prepare 1L of 2.5 mol / L magnesium hydroxide slurry in a beaker with a volume of 3.5L, and drop 770mL of 1 mol / L magnesium hydroxide slurry into 770mL of 1mol / L magnesium hydroxide under stirring respectively with a time of 30 minutes using a quantitative pump. / L aluminum nitrate aqueous solution and 1,200mL 0.75 mol / L sodium carbonate aqueous solution. The reaction temperature was 40° C., and the pH after the reaction was 8.7. The reaction solution was filtered, washed with water, dried in an oven at 60° C. for 20 minutes, and pulverized by a laboratory-scale hammer mill to obtain a composite metal compound C. Details of the reaction conditions and the composition of the resulting composite metal compound C are shown in Table 1.
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